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At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations to come. Our pioneering and inventive spirit has enabled us to be at the forefront of many technological advancements in our nation's history - from the first flight across the Atlantic Ocean, to stealth bombers, to landing on the moon. We look for people who have bold new ideas, courage and a pioneering spirit to join forces to invent the future, and have fun along the way. Our culture thrives on intellectual curiosity, cognitive diversity and bringing your whole self to work and we have an insatiable drive to do what others think is impossible. Our employees are not only part of history, they're making history.

Northrop Grumman Mission Systems is a trusted provider of mission-enabling solutions for global security. Our organization is chartered with providing the skills, innovative technologies to develop, design, produce and sustain optimized product lines across the sector while providing a decisive advantage to the warfighter.

We are looking for you to join our team as a Network Engineer/Principal Network Engineer based out of San Diego, CA . As a Network Engineer/Principal Network Engineer at Northrop Grumman you will have a challenging and rewarding opportunity to be a part of our Enterprise-wide digital transformation. Through the use of Model-based Engineering, DevSecOps and Agile practices we continue to evolve how we deliver critical national defense products and capabilities for the warfighter. Our success is grounded in our ability to embrace change, move quickly and continuously drive innovation. The successful candidate will be collaborative, open, transparent, and team-oriented with a focus on team empowerment & shared responsibility, flexibility, continuous learning, and a culture of automation.

What You'll Get to Do:

• Work closely with engineers and technicians in a lab environment
• Advise on integration of new emerging industry technologies to the program's systems
• Implement engineering changes to the system as required
• Review, analyze, and incorporate technical requirements into end-to-end system architectures
• Responsible for completing the network configurations and coordinating with the peers, SMEs, and government engineers
• Occasional travel may be required

This position may be filled as a Network Engineer or Principal Network Engineer.

Qualifications:

Basic Qualifications for Network Engineer:

• Bachelors degree in science, engineering, or related discipline with 2 years of experience; OR 0 years of experience with a Masters degree
• An additional 4 years of relevant experience can be considered in lieu of a Bachelor degree.
• Experience with network design, architecture, specifications, and equipment selection.
• Understanding of IP4 and IPv6 network design, including IP sub-netting and protocols including BGP, OSPF and EIGRP.
• Understanding of network device configuration and troubleshooting (ideally, Cisco IOS/IOS-XE).
• Understanding of advanced features like GRE, IPSEC, IP quality-of-service, VLANs, and multicast.
• Familiar with network management protocols, like SNMP, SSH, syslog, RADIUS/TACACS.
• Ability to travel 10% of the time
• Must be a US Citizen
• CLEARANCE: The ability to obtain and maintain a DoD secret clearance is required

Basic Qualifications for Principal Network Engineer:

• Bachelors degree in science, engineering, or related discipline with 5 years of experience; OR 3 years of relevant experience with a Masters degree; OR 1 year of experience with STEM PhD degree
• An additional 4 years of relevant experience can be considered in lieu of a Bachelor degree.
• Experience with network design, architecture, specifications, and equipment selection.
• Understanding of IP4 and IPv6 network design, including IP sub-netting and protocols including BGP, OSPF and EIGRP.
• Understanding of network device configuration and troubleshooting (ideally, Cisco IOS/IOS-XE).
• Understanding of advanced features like GRE, IPSEC, IP quality-of-service, VLANs, and multicast.
• Familiar with network management protocols, like SNMP, SSH, syslog, RADIUS/TACACS.
• Ability to travel 10% of the time
• Must be a US Citizen
• CLEARANCE: The ability to obtain and maintain a DoD secret clearance is required

Preferred Qualifications:

• DoD 8570 Security certification such as Sec+, CASP, CISSP, or equivalent.
• A professional certification specific to the networking industry like a CCNA/CCNP/CCIE or equivalent.
• Familiar with network management applications, like Splunk, Firepower Management Center (FMC), and/or Cisco ISE.
• Exposure to the Risk Management Framework, associated security controls, and STIGs.
• Familiar with Windows, Linux, and VMWare configuration and troubleshooting.
• Experience with HAIPE/TACLANE and other military COMSEC/CRYPTO equipment and procedures.
• Experience with tactical/military radio networks, like Common Data Link (CDL) and ANW2.
• Experience with (MIL) SATCOM equipment and services.
• Experience with Cisco Unified Communications / VoIP and VTC
• Experience with Cisco Modelling Labs (CML) or Virtual Internet Routing Lab (VIRL).
• Proficiency with MS Office tools, including PowerPoint and Visio
• Active U.S. Government DOD Secret Clearance

Salary Range: $81,300.00 - $21,900.00 Salary Range 2: 100,300.00 - 150,500.00 The above salary range represents a general guideline; however, Northrop Grumman considers a number of factors when determining base salary offers such as the scope and responsibilities of the position and the candidate's experience, education, skills and current market conditions. Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay. Annual bonuses are designed to reward individual contributions as well as allow employees to share in company results. Employees in Vice President or Director positions may be eligible for Long Term Incentives. In addition, Northrop Grumman provides a variety of benefits including health insurance coverage, life and disability insurance, savings plan, Company paid holidays and paid time off (PTO) for vacation and/or personal business.

The application period for the job is estimated to be 20 days from the job posting date. However, this timeline may be shortened or extended depending on business needs and the availability of qualified candidates. Northrop Grumman is an Equal Opportunity Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. For our complete EEO and pay transparency statement, please visit U.S. Citizenship is required for all positions with a government clearance and certain other restricted positions.

MANTECH seeks a skilled and security-focused Network Engineer to support the Cryptographic Solutions Program within the National Security Systems domain in Linthicum Heights, MD . This opportunity allows you to directly contribute to national defense by securing critical communication infrastructures used by the Department of Defense and Intelligence Community. In this role, you will help design, implement, and safeguard cryptographic networks that ensure data protection, compliance, and mission assurance across highly sensitive environments.
 

Responsibilities include, but are not limited to:

• Implement encryption protocols (e.g., SSL/TLS, IPsec) to safeguard data in transit
• Configure and secure firewalls, routers, and switches within classified environments
• Monitor network performance and identify anomalies using advanced diagnostic tools
• Troubleshoot cryptographic implementations and resolve connectivity issues
• Maintain and update cryptographic systems to address known vulnerabilities
• Conduct technical risk assessments to evaluate network infrastructure threats
• Analyze existing cryptographic methods and recommend enhancements or alternatives
• Collaborate with cybersecurity professionals to meet compliance and certification requirements
• Develop and maintain comprehensive documentation of network architecture, policies, and procedures
   

Minimum Qualifications:

• Bachelor’s degree in Network Engineering, Systems Engineering, Information Technology, or related field and 3 years of relevant experience; OR Master’s degree in a related field and 1 year of relevant experience; OR 8 years of relevant experience may be substituted for degree
• Proficiency in securing and troubleshooting core network protocols and components
• Experience with Nessus, and system administration across Linux/Windows environments
• Understanding of network security principles including segmentation and monitoring
• CompTIA Security+ certification or equivalent industry credential
   

Preferred Qualifications:

• Background in cryptographic engineering or cybersecurity analysis
• Familiarity with certification and accreditation processes for secure systems
• Experience supporting DoD or Intelligence Community infrastructure programs
   

Clearance Requirements:

• Must possess a current and active TS/SCI with Polygraph
   

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time
• Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and/or virtual communication, which may involve delivering presentations

ManTech seeks a motivated, career and customer-oriented Network Engineer to join our team in Annapolis Junction, MD . The Network SME is responsible for supporting operational design, installation and testing of newly installed and existing network and security devices across multiple classification domains in support of a global footprint.  The successful candidate will work with a high functioning team based in Maryland supporting other network technicians in multiple states and countries.

Responsibilities include but are not limited to:

• With no supervision and minimal guidance, assist with the evaluation, design, documentation, installation/implementation, testing, perform problem isolation and resolution of network errors.
• Install data and voice cables for business cable television and router/switched systems.

grade existing cable television and internet systems

• Provide Tier III engineering support to a globally distributed services team in geographically dispersed customer locations.
• Interface with agency and non-agency sites via emails/phone to walk them through hands-on troubleshooting.
• Work flexible hours, staying until the job is completed (mission is restored).
• Conduct site surveys, prepares configuration capture (documents) computers, networking devices, and various peripheral equipment impacted by the cable plant.
• Communicate effectively with a wide variety of technical and non-technical audiences, including customers, team partners, and other staff members.
• Travel is required in support of service requirements ~10-20%. This position also offers opportunities to support other bodies of work, at different locations, and to travel both CONUS and OCONUS (no hostile areas).
• Integrate DoD serial and IP encryption methodologies into intricate networks and systems, embodying a profound comprehension of security imperatives.
• Execute Tier 3 LAN and WAN support across multiple domains and locations both CONUS & OCONUS using standard enterprise tools.
• Troubleshoot spanning diverse technologies encompassing OSPF, EIGRP, BGP, DMVPN, LACP, VPLS, EVPN VxLAN, QoS IP multicasting technologies, LSP, Spanning-Tree, Port-Security, and multiple Layer 2 and 3 networking functions.
• Assimilate DoD serial and IP encryption, augmenting the integrity of networks and systems.
   

Minimum Qualifications:

• Must hold a current 8570 compliance Level II certification such as Sec+ CE or CCNA
• Bachelor’s degree and 4 additional years of relevant experience.  4 years of experience may be substituted for education
• Proven hands-on experience with Cisco platforms (ASR, ISR, CSR, Catalyst) is required, and hands-on experience with network management and monitoring system.
• Possess the skills to track, analyze and monitor technology performance metrics.
• Able to complete CAN networking requirements (configurations, port security, VLAN assignments, etc).
• Basic understanding of site drawings, prints, schematics, and room layouts.
• A working knowledge of cyber infrastructure, networking protocols, with a thorough understanding of TCP/IP, IPv4/v6 address management and DNS
• Basic knowledge of the TIA/EIA color code for copper and fiber cabling systems.
• 4 years of experience in programs and contracts of similar scope, type, and complexity are required
• Experience with service management knowledge in key ITSM processes including incident management, problem management, change management, service level management and knowledge management

Preferred Qualifications:

• Experience with customer ticketing systems such as ServiceNow
• Experience in a technical role with an understanding of IT equipment and service life as well as planning and implementation of equipment replacement

• Experience with large scale enterprise IT contracts

Clearance Requirements:

• Must have a current/active TS/SCI w/ Poly

Physical Requirements:

• The person must be able to handle cable of varying lengths, widths and weights and the associated equipment.  The person in this position must be able to remain in a stationary position 50% of the time, occasionally moving about inside the office to collaborate with other leaders/teams, use standard office automation equipment, and virtual communication, which may involve delivering presentations.
• Able to lift at least 30 pounds.
• Working both indoor and outdoor environments.

MANTECH seeks a skilled and security-focused Network Engineer to support the Cryptographic Solutions Program within the National Security Systems domain in Linthicum Heights, MD . This opportunity allows you to directly contribute to national defense by securing critical communication infrastructures used by the Department of Defense and Intelligence Community. In this role, you will help design, implement, and safeguard cryptographic networks that ensure data protection, compliance, and mission assurance across highly sensitive environments.
 

Responsibilities include, but are not limited to:

• Implement encryption protocols (e.g., SSL/TLS, IPsec) to safeguard data in transit
• Configure and secure firewalls, routers, and switches within classified environments
• Monitor network performance and identify anomalies using advanced diagnostic tools
• Troubleshoot cryptographic implementations and resolve connectivity issues
• Maintain and update cryptographic systems to address known vulnerabilities
• Conduct technical risk assessments to evaluate network infrastructure threats
• Analyze existing cryptographic methods and recommend enhancements or alternatives
• Collaborate with cybersecurity professionals to meet compliance and certification requirements
• Develop and maintain comprehensive documentation of network architecture, policies, and procedures
   

Minimum Qualifications:

• Bachelor’s degree in Network Engineering, Systems Engineering, Information Technology, or related field and 3 years of relevant experience; OR Master’s degree in a related field and 1 year of relevant experience; OR 8 years of relevant experience may be substituted for degree
• Proficiency in securing and troubleshooting core network protocols and components
• Experience with Nessus, and system administration across Linux/Windows environments
• Understanding of network security principles including segmentation and monitoring
• CompTIA Security+ certification or equivalent industry credential
   

Preferred Qualifications:

• Background in cryptographic engineering or cybersecurity analysis
• Familiarity with certification and accreditation processes for secure systems
• Experience supporting DoD or Intelligence Community infrastructure programs
   

Clearance Requirements:

• Must possess a current and active TS/SCI with Polygraph
   

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time
• Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and/or virtual communication, which may involve delivering presentations

ManTech seeks a motivated, career and customer-oriented Network Engineer to join our team in Annapolis Junction, MD . The Network SME is responsible for supporting operational design, installation and testing of newly installed and existing network and security devices across multiple classification domains in support of a global footprint.  The successful candidate will work with a high functioning team based in Maryland supporting other network technicians in multiple states and countries.

Responsibilities include but are not limited to:

• With no supervision and minimal guidance, assist with the evaluation, design, documentation, installation/implementation, testing, perform problem isolation and resolution of network errors.
• Install data and voice cables for business cable television and router/switched systems.

grade existing cable television and internet systems

• Provide Tier III engineering support to a globally distributed services team in geographically dispersed customer locations.
• Interface with agency and non-agency sites via emails/phone to walk them through hands-on troubleshooting.
• Work flexible hours, staying until the job is completed (mission is restored).
• Conduct site surveys, prepares configuration capture (documents) computers, networking devices, and various peripheral equipment impacted by the cable plant.
• Communicate effectively with a wide variety of technical and non-technical audiences, including customers, team partners, and other staff members.
• Travel is required in support of service requirements ~10-20%. This position also offers opportunities to support other bodies of work, at different locations, and to travel both CONUS and OCONUS (no hostile areas).
• Integrate DoD serial and IP encryption methodologies into intricate networks and systems, embodying a profound comprehension of security imperatives.
• Execute Tier 3 LAN and WAN support across multiple domains and locations both CONUS & OCONUS using standard enterprise tools.
• Troubleshoot spanning diverse technologies encompassing OSPF, EIGRP, BGP, DMVPN, LACP, VPLS, EVPN VxLAN, QoS IP multicasting technologies, LSP, Spanning-Tree, Port-Security, and multiple Layer 2 and 3 networking functions.
• Assimilate DoD serial and IP encryption, augmenting the integrity of networks and systems.
   

Minimum Qualifications:

• Must hold a current 8570 compliance Level II certification such as Sec+ CE or CCNA
• Bachelor’s degree and 4 additional years of relevant experience.  4 years of experience may be substituted for education
• Proven hands-on experience with Cisco platforms (ASR, ISR, CSR, Catalyst) is required, and hands-on experience with network management and monitoring system.
• Possess the skills to track, analyze and monitor technology performance metrics.
• Able to complete CAN networking requirements (configurations, port security, VLAN assignments, etc).
• Basic understanding of site drawings, prints, schematics, and room layouts.
• A working knowledge of cyber infrastructure, networking protocols, with a thorough understanding of TCP/IP, IPv4/v6 address management and DNS
• Basic knowledge of the TIA/EIA color code for copper and fiber cabling systems.
• 4 years of experience in programs and contracts of similar scope, type, and complexity are required
• Experience with service management knowledge in key ITSM processes including incident management, problem management, change management, service level management and knowledge management

Preferred Qualifications:

• Experience with customer ticketing systems such as ServiceNow
• Experience in a technical role with an understanding of IT equipment and service life as well as planning and implementation of equipment replacement

• Experience with large scale enterprise IT contracts

Clearance Requirements:

• Must have a current/active TS/SCI w/ Poly

Physical Requirements:

• The person must be able to handle cable of varying lengths, widths and weights and the associated equipment.  The person in this position must be able to remain in a stationary position 50% of the time, occasionally moving about inside the office to collaborate with other leaders/teams, use standard office automation equipment, and virtual communication, which may involve delivering presentations.
• Able to lift at least 30 pounds.
• Working both indoor and outdoor environments.

MANTECH  seeks a motivated, career and customer-oriented Network Engineer  to join our team in Norfolk, VA.  This is an onsite  position. 

Responsibilities include but are not limited to:

• Providing network security support to Navy operational and training networks focused specifically on the Navy Enterprise Tactical Training Network (NETTN)

• Ensuring uninterrupted network connectivity to customers and sites by planning and executing the installation of new capabilities, as well as operating, maintaining, and troubleshooting network connectivity and infrastructure on enterprise managed networks including support of multiple network enclaves across classification levels

• Support establishment and maintenance of various networks across the NCTE enterprise environment, including IP, LAN, WAN, and MPLS among others

• Running network protocols, network engineering techniques and architectures in support of Navy training and operational requirements

• Working directly with government and contractor personnel receiving engineering oversight form the Naval Surface Warfare Center (NSWC), Corona Division

• Analyzing site survey reports to ensure accurate network engineering planning

• Support the procurement of network device hardware and software and oversee their installation and integration into the NCTE based on the approved network portfolio

• · Set-up, configuration, and support of internal and external networks, to include:

• Proficiency with network performance monitoring tools

• Identifying and analyzing systems requirements

• Developing and maintaining system applications and security

• Developing and maintaining network configurations

• Troubleshooting network performance issues

• Providing user support and guidance

• Recommending and implementing upgrades, patches, new applications, and new equipment

• Developing and maintaining a disaster recovery plan

• Ensuring proper documentation, coordination, and maintenance of multiple systems

Minimum Qualifications:

• Bachelor’s degree in Computer Science, Information Technology, or other related field and 5+ years relevant Network Engineering experience OR High School Diploma and 11 years of relevant experience may be substituted in lieu of degree

• Experience with the Department of Defense (DoD) Security Technical Implementation Guidelines

• Experience in implementing and integrating cross domain solutions at both the Secret and TS levels

• Computing Environment/Operating System (CE/OS) certifications Linux, Windows or Cisco

• Expertise in network infrastructure and operations

• Strong Cisco networking skills (IP addressing, switching, routing, IOS) and leadership in end-to-end network lifecycle for C4I systems

Preferred Qualifications:

• 7+ years of relevant work experience as a network engineer within a U.S. Government environment, DoD strongly preferred

• Master’s degree in computer science, Information Technology, or other related field

• Active CCNA certification

• Experience in a Network Operations Center (NOC) or Network Operations Security Center (NOSC) environment including help desk, customer communication, trouble ticketing, and issue resolution

• Experience with network security architecture similar to the NETTN including Cisco Identity Services Engine (ISE), Cisco Secure Firewall Management Center, Cisco Firepower NGFW firewalls, AAA, 802.1x, VPN deployments, STIG implementation and verification, Command Cyber Readiness Inspections (CCRI)

Clearance Requirements:

• Active Secret clearance with the ability to obtain and maintain an active Top Secret/ SCI security clearance

Physical Requirements:

• Must be able to remain in a stationary position 50%

• Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer

• The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

MANTECH  seeks a motivated, career and customer-oriented Network Engineer to join our team in Norfolk, Va.  This is an onsite  position. 

Responsibilities include but are not limited to:

• Providing network security support to Navy operational and training networks focused specifically on the Navy Enterprise Tactical Training Network (NETTN)

• Ensuring uninterrupted network connectivity to customers and sites by planning and executing the installation of new capabilities, as well as operating, maintaining, and troubleshooting network connectivity and infrastructure on enterprise managed networks including support of multiple network enclaves across classification levels

• Support establishment and maintenance of various networks across the NCTE enterprise environment, including IP, LAN, WAN, and MPLS among others

• Running network protocols, network engineering techniques and architectures in support of Navy training and operational requirements

• Working directly with government and contractor personnel receiving engineering oversight form the Naval Surface Warfare Center (NSWC), Corona Division

• Analyzing site survey reports to ensure accurate network engineering planning

• Support the procurement of network device hardware and software and oversee their installation and integration into the NCTE based on the approved network portfolio

• Set-up, configuration, and support of internal and external networks, to include: Identifying and analyzing systems requirements, Developing and maintaining system applications and security, Developing and maintaining network configurations, Troubleshooting network performance issues, Providing user support and guidance, Recommending and implementing upgrades, patches, new applications, and new equipment, Developing and maintaining a disaster recovery plan, Ensuring proper documentation, coordination, and maintenance of multiple systems

Minimum Qualifications:

• Bachelor’s degree in Computer Science, Information Technology, or other related field and 5+ years relevant network engineering experience OR High School diploma and 11 years of relevant experience

• Experience with the Department of Defense (DoD) Security Technical Implementation Guidelines

• Experience in implementing and integrating cross domain solutions at both the Secret and TS levels

• Computing Environment/Operating System (CE/OS) certifications Linux, Windows or Cisco

• Expertise in network infrastructure and operations

• Proficiency with network performance monitoring tools

• Strong Cisco networking skills (IP addressing, switching, routing, IOS) and leadership in end-to-end network lifecycle for C4I systems

Preferred Qualifications:

• 7+ years of relevant work experience as a network engineer within a U.S. Government environment, DoD strongly preferred

• Master’s degree in computer science, Information Technology, or other related field

• Active CCNA certification

• Experience in a Network Operations Center (NOC) or Network Operations Security Center (NOSC) environment including help desk, customer communication, trouble ticketing, and issue resolution

• Experience with network security architecture similar to the NETTN including Cisco Identity Services Engine (ISE), Cisco Secure Firewall Management Center, Cisco Firepower NGFW firewalls, AAA, 802.1x, VPN deployments, STIG implementation and verification, Command Cyber Readiness Inspections (CCRI)

Clearance Requirements:

• Active Secret security clearance with the ability to obtain and maintain an active Top Secret/ SCI security clearance

Physical Requirements:

• Must be able to remain in a stationary position 50%

• Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer

• The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.