52,240 Technology Professionals jobs in the United States

The network administrator is responsible for maintaining the networks and systems that keep our organization running. From maintaining ironclad security to supervising network updates and training users, the administrator is not only IT support but also the thread that connects all operations. Deep technological expertise with a wide range of computer systems, hardware, and software is essential for the network administrator to excel in this role and help drive our organization forward.

• Assist in network design, implementation, and maintenance
• Provide network support across organizational operating systems
• Maintain stable and consistent connectivity across all network computers
• Prepare, implement, and monitor disaster procedures and recovery

• Maintain network servers and associated hardware, software, services, and settings
• Recommend, test, and implement system and security upgrades
• Consistently monitor and troubleshoot network stability and performance
• Create, adjust, and maintain network user settings and permissions
• Write technical support documentation for network systems and applications

• Two or more years of experience in a network administration role
• Comprehensive knowledge of networking concepts and computing infrastructures
• Proven skills in network engineering, operations, and performance analysis
• Experience with leading server management and monitoring tools
• Strong communication skills for training and assisting users

• Bachelor’s degree (or equivalent) in computer science or related field
• Experience with Microsoft Windows Server 2008 and forward
• Experience with Cisco switches and routers
• Professional certification, such as CISSP, CCNA, or CCNP

Mantech seeks a motivated, career and customer-oriented Network Administrator with a focus on Cisco Networks to join our team in Laurel, MD .

You will be part of a mission-driven team delivering enterprise infrastructure capabilities to support a global workforce engaged in national defense operations

Responsibilities include, but are not limited to:

• Maintain and upgrade network infrastructure, including routers and switches
• Update and configure antivirus software and other tools to secure the network
• Apply Security Technical Implementation Guide (STIG) updates to switches and follow Software Test and Evaluation (STE) policies
• Design and plan Cisco NEXUS network infrastructure, including setup and ongoing maintenance
• Configure Remote Authentication Dial-In User Service (RADIUS) for switch administration
• Use network monitoring and management tools such as Solarwinds to oversee network performance
• Must be willing to work a flexible schedule between 6:00am-6:00pm and may be assigned to an evening patching schedule

Minimum Qualifications:

• Bachelor’s degree in a technical discipline from an accredited college or university with 12+ years of experience as a Network Administrator. 3 additional years of Network Administration experience with an associate’s degree OR 8 years of additional experience and a high school diploma might be substituted
• Demonstrated experience downloading software and upgrading Cisco switches and firewalls
• Strong technical background in Cisco FirePower Firewalls
• IAT II certification (DoD 8140 required within 60 days of starting employment.  Acceptable certifications include CCNA-Security/CySA+/GICSP/GSEC/Security+ CE/CND/ or SSCP)

Preferred Qualifications:

• Familiarity with configuring, scripting, and managing Unix, RHEL and Windows operating systems
• Familiarity with Scanboy
• Familiarity with JIRA ticketing system
• Familiarity with Enclave environments
• Familiarity with Solarwinds
• Familiarity using LatteART and XACTA

Clearance Requirements:

• Must have a current/active TS/SCI with Polygraph

Physical Requirements:

• The candidate must be able to move, carry, and deliver workstations from the office to the customer’s desk
• The person in this position must be able to remain in a stationary position 50% of the time
• Must communicate with co-workers, management, and customers via email, phone, or virtual meetings, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

ManTech seeks a motivated, career- and customer-oriented Network Administrator with a focus on Cisco Networks to join our team in Laurel, MD . You will be part of a mission-driven team delivering enterprise infrastructure capabilities to support a global workforce engaged in national defense operations. This position is part of the Enterprise Infrastructure Services (EIS) organization—responsible for MPO’s Enterprise Information Technology (EIT), the backbone platform supporting all enterprise users. You will work with customers, Integrated Product Teams (IPTs), and vendors to deliver secure and reliable network services across Data Center & Compute environments.

Responsibilities include, but are not limited to:

• Maintain and upgrade network infrastructure, including routers and switches
• Update and configure antivirus software and other tools to secure the network
• Apply Security Technical Implementation Guide (STIG) updates to switches and follow Software Test and Evaluation (STE) policies
• Design and plan Cisco NEXUS network infrastructure, including setup and ongoing maintenance
• Configure Remote Authentication Dial-In User Service (RADIUS) for switch administration
• Use network monitoring and management tools such as Solarwinds to oversee network performance
• Must be willing to work a flexible schedule between 6:00am-6:00pm and may be assigned to an evening patching schedule

Minimum Qualifications:

• Bachelor’s degree in a technical discipline from an accredited college or university and Twelve (12) years of experience as a Network Administrator supporting programs and contracts of similar scope, type, and complexity. In lieu of a Bachelor’s degree, three (3) years of additional Network Administration experience with an Associates degree may be substituted OR eight (8) years of additional experience and a High School Diploma
• Demonstrated experience downloading software and upgrading Cisco switches and firewalls
• Strong technical background in Cisco FirePower Firewalls
• IAT II certification (DoD 8140 required within 60 days of starting employment.  Acceptable certifications include CCNA-Security/CySA+/GICSP/GSEC/Security+ CE/CND/ or SSCP)

Preferred Qualifications:

• Familiarity with configuring, scripting, and managing Unix, RHEL and Windows operating systems
• Familiarity with Scanboy
• Familiarity with JIRA ticketing system
• Familiarity with Enclave environments
• Familiarity with Solarwinds
• Familiarity using LatteART and XACTA

Clearance Requirements:

• Must have a current/active TS/SCI with Polygraph

Physical Requirements:

• The candidate must be able to move, carry, and deliver workstations from the office to the customer’s desk
• The person in this position must be able to remain in a stationary position 50% of the time
• Must communicate with co-workers, management, and customers via email, phone, or virtual meetings, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

Mantech seeks a motivated, career and customer-oriented Network Administrator , to join our team in San Antonio, TX . 

The team delivers enterprise infrastructure capabilities for a global workforce performing a wide range of missions in defense of our Nation

Responsibilities Included but are not limited to:

• Responsible for supporting customer networks involving cross-domain solutions, including VPNs, one-way data transfers, unclassified mission related infrastructures, and Taclane 175 encryption devices.  Specific configurations include routing using MPLS/VPLS, OSPF, EIGRP at the Core and Distribution devices and switching at the Access devices.
• Responsible for performing planning, deployment and quality assurance functions for system and network upgrade projects.
• Will develop high, mid and lower-level diagrams and schematics to document the system and network infrastructure for planning, historical and continuity purposes.
• Responsible for designing, installing, configuring, troubleshooting and maintaining a LAN/WAN equipment required to provide telecommunications services in a complex environment consisting of various Cisco network equipment to include Nexus and Catalyst model as well as Integrated Service Routers.
• Responsible for designing networks utilizing switching technology to include VLAN, Inter-VLAN routing, trunking, and port aggregation on the WAN/LAN environment.

 Minimum Qualifications:

• Bachelor’s degree with 12+ years of relevant experience OR associates degree with 15 years OR high school diploma with 20 years of relevant experience
• Experience configuring and troubleshooting Cisco catalyst switches
• Experience configuring and troubleshooting Cisco ASR routers
• IAT II certification (DoD 8140 required within 60 days of starting employment.  Acceptable certifications include CCNA-Security/CySA+/GICSP/GSEC/Security+ CE/CND/ or SSCP)

Preferred Qualifications:

• Experience with supporting cross-domain customer networks (VPNs, one-way data transfers, unclassified infra, Taclane 175), with expertise in Core/Distribution routing (MPLS/VPLS, OSPF, EIGRP) and Access switching.
• Experience with Linux network troubleshooting

Clearance Requirements:

• Must have a current/active TS/SCI w/ Polygraph.   

Physical Requirements:  

• Bending, carrying, kneeling, lifting, light work up to 20 lbs., reaching, repetitive motions, sedentary work, walking, working with data, ability to handle stress & work under pressure, ability to use MS Office, ability to use a PC, analytical or critical thinking skills, interpersonal & people skills, leadership skills, listening skills, multi-tasking ability, oral & written communication skills, organizational skills.

ManTech seeks a motivated, career- and customer-oriented Network Administrator with a focus on Cisco Networks to join our team in Laurel, MD . You will be part of a mission-driven team delivering enterprise infrastructure capabilities to support a global workforce engaged in national defense operations. This position is part of the Enterprise Infrastructure Services (EIS) organization—responsible for MPO’s Enterprise Information Technology (EIT), the backbone platform supporting all enterprise users. You will work with customers, Integrated Product Teams (IPTs), and vendors to deliver secure and reliable network services across Data Center & Compute environments.

Responsibilities include, but are not limited to:

• Maintain and upgrade network infrastructure, including routers and switches
• Update and configure antivirus software and other tools to secure the network
• Apply Security Technical Implementation Guide (STIG) updates to switches and follow Software Test and Evaluation (STE) policies
• Design and plan Cisco NEXUS network infrastructure, including setup and ongoing maintenance
• Configure Remote Authentication Dial-In User Service (RADIUS) for switch administration
• Use network monitoring and management tools such as Solarwinds to oversee network performance
• Must be willing to work a flexible schedule between 6:00am-6:00pm and may be assigned to an evening patching schedule

Minimum Qualifications:

• Bachelor’s degree in a technical discipline from an accredited college or university and Twelve (12) years of experience as a Network Administrator supporting programs and contracts of similar scope, type, and complexity. In lieu of a Bachelor’s degree, three (3) years of additional Network Administration experience with an Associates degree may be substituted OR eight (8) years of additional experience and a High School Diploma
• Demonstrated experience downloading software and upgrading Cisco switches and firewalls
• Strong technical background in Cisco FirePower Firewalls
• IAT II certification (DoD 8140 required within 60 days of starting employment.  Acceptable certifications include CCNA-Security/CySA+/GICSP/GSEC/Security+ CE/CND/ or SSCP)

Preferred Qualifications:

• Familiarity with configuring, scripting, and managing Unix, RHEL and Windows operating systems
• Familiarity with Scanboy
• Familiarity with JIRA ticketing system
• Familiarity with Enclave environments
• Familiarity with Solarwinds
• Familiarity using LatteART and XACTA

Clearance Requirements:

• Must have a current/active TS/SCI with Polygraph

Physical Requirements:

• The candidate must be able to move, carry, and deliver workstations from the office to the customer’s desk
• The person in this position must be able to remain in a stationary position 50% of the time
• Must communicate with co-workers, management, and customers via email, phone, or virtual meetings, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

Mantech seeks a motivated, career and customer-oriented Network Administrator with a focus on Cisco Networks to join our team in Laurel, MD .

You will be part of a mission-driven team delivering enterprise infrastructure capabilities to support a global workforce engaged in national defense operations

Responsibilities include, but are not limited to:

• Maintain and upgrade network infrastructure, including routers and switches
• Update and configure antivirus software and other tools to secure the network
• Apply Security Technical Implementation Guide (STIG) updates to switches and follow Software Test and Evaluation (STE) policies
• Design and plan Cisco NEXUS network infrastructure, including setup and ongoing maintenance
• Configure Remote Authentication Dial-In User Service (RADIUS) for switch administration
• Use network monitoring and management tools such as Solarwinds to oversee network performance
• Must be willing to work a flexible schedule between 6:00am-6:00pm and may be assigned to an evening patching schedule

Minimum Qualifications:

• Bachelor’s degree in a technical discipline from an accredited college or university with 12+ years of experience as a Network Administrator. 3 additional years of Network Administration experience with an associate’s degree OR 8 years of additional experience and a high school diploma might be substituted
• Demonstrated experience downloading software and upgrading Cisco switches and firewalls
• Strong technical background in Cisco FirePower Firewalls
• IAT II certification (DoD 8140 required within 60 days of starting employment.  Acceptable certifications include CCNA-Security/CySA+/GICSP/GSEC/Security+ CE/CND/ or SSCP)

Preferred Qualifications:

• Familiarity with configuring, scripting, and managing Unix, RHEL and Windows operating systems
• Familiarity with Scanboy
• Familiarity with JIRA ticketing system
• Familiarity with Enclave environments
• Familiarity with Solarwinds
• Familiarity using LatteART and XACTA

Clearance Requirements:

• Must have a current/active TS/SCI with Polygraph

Physical Requirements:

• The candidate must be able to move, carry, and deliver workstations from the office to the customer’s desk
• The person in this position must be able to remain in a stationary position 50% of the time
• Must communicate with co-workers, management, and customers via email, phone, or virtual meetings, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

Mantech seeks a motivated, career and customer-oriented Network Administrator , to join our team in San Antonio, TX . 

The team delivers enterprise infrastructure capabilities for a global workforce performing a wide range of missions in defense of our Nation

Responsibilities Included but are not limited to:

• Responsible for supporting customer networks involving cross-domain solutions, including VPNs, one-way data transfers, unclassified mission related infrastructures, and Taclane 175 encryption devices.  Specific configurations include routing using MPLS/VPLS, OSPF, EIGRP at the Core and Distribution devices and switching at the Access devices.
• Responsible for performing planning, deployment and quality assurance functions for system and network upgrade projects.
• Will develop high, mid and lower-level diagrams and schematics to document the system and network infrastructure for planning, historical and continuity purposes.
• Responsible for designing, installing, configuring, troubleshooting and maintaining a LAN/WAN equipment required to provide telecommunications services in a complex environment consisting of various Cisco network equipment to include Nexus and Catalyst model as well as Integrated Service Routers.
• Responsible for designing networks utilizing switching technology to include VLAN, Inter-VLAN routing, trunking, and port aggregation on the WAN/LAN environment.

 Minimum Qualifications:

• Bachelor’s degree with 12+ years of relevant experience OR associates degree with 15 years OR high school diploma with 20 years of relevant experience
• Experience configuring and troubleshooting Cisco catalyst switches
• Experience configuring and troubleshooting Cisco ASR routers
• IAT II certification (DoD 8140 required within 60 days of starting employment.  Acceptable certifications include CCNA-Security/CySA+/GICSP/GSEC/Security+ CE/CND/ or SSCP)

Preferred Qualifications:

• Experience with supporting cross-domain customer networks (VPNs, one-way data transfers, unclassified infra, Taclane 175), with expertise in Core/Distribution routing (MPLS/VPLS, OSPF, EIGRP) and Access switching.
• Experience with Linux network troubleshooting

Clearance Requirements:

• Must have a current/active TS/SCI w/ Polygraph.   

Physical Requirements:  

• Bending, carrying, kneeling, lifting, light work up to 20 lbs., reaching, repetitive motions, sedentary work, walking, working with data, ability to handle stress & work under pressure, ability to use MS Office, ability to use a PC, analytical or critical thinking skills, interpersonal & people skills, leadership skills, listening skills, multi-tasking ability, oral & written communication skills, organizational skills.