3,423 Hpc System Administrators jobs in the United States

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.

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.

ABOUT VIAPLUS:

ViaPlus is a global mobility company in the Intelligent Transportation Systems (ITS) market, specializing in revenue and services management solutions for the transportation industry. Our customer operations, data analytics, and full-featured, single-account back-office technology facilitate the high-volume transactions required for seamless multimodal mobility. As a VINCI Highways subsidiary, we are committed to technical innovation and to promoting a positive mobility experience for all.

We are pioneers in the transportation transaction and mobility industry, with a decade of proven global experience in providing solutions focused on the tolling and transit industries. ViaPlus is headquartered near Dallas, Texas, and maintains offices across the United States, France, India, and Ireland. We are part of the global network of VINCI Concessions, an international player in transport infrastructure with projects in 23 countries. Our vision has evolved to provide a fully automated, end-to-end transportation solution that significantly improves revenue collection and efficiency while effectively lowering costs for our agency clients.

We serve enterprises that require high-volume, real-time transaction processing with the highest levels of accuracy, especially where revenue reconciliation and customer account management are key deliverables to the customer experience. Our flagship back-office system (BOS) enables Mobility-as-a-Service (MaaS) with a “one account” feature that supports multimodal transportation solutions. In a rapidly changing environment, ViaPlus maintains a strong focus on technology and continuous R&D to improve agency efficiencies, reduce operating expenses, and maximize revenue – all while providing exceptional customer service.

Learn more:

ABOUT VINCI HIGHWAYS

VINCI Highways, a VINCI Concessions subsidiary, is a leader in road concessions, operations and mobility services. We design, finance, build and operate highways, bridges, tunnels, urban roads and mobility services on a network of more than 3,360 km in 15 countries. VINCI Highways leverages its expertise to deliver the highest performance and safety standards and provide drivers with a positive experience.

More information:


@VINCIConcess

JOB PROFILE: Network Administrator

JOB LOCATION: Dallas, Texas

JOB RESPONSIBILITIES:

In this role, you will be responsible for various tasks outlined below. The order of the duties listed does not represent their importance or the percentage of time dedicated to each duty.

· Configure, monitor, and maintain firewalls, including policy management, VPN setup, and threat prevention features.

· Manage switches, including configuration, VLAN setup, and performance optimization.

· Perform routine network maintenance and upgrades, including patching and firmware updates.

· Monitor network performance and troubleshoot latency, throughput, and connectivity issues.

· Implement and maintain network security best practices, including access control, segmentation, and logging.

· Collaborate with the security team to investigate and respond to security incidents.

· Maintain network documentation, including diagrams, IP schemas, and configuration backups.

· Participate in on-call rotation and provide after-hours support as needed.

QUALIFICATIONS:

To perform this job successfully, an individual must be able to satisfactorily perform each essential duty. The requirements below represent the required knowledge, skills, and/or abilities. Reasonable accommodations may be made to enable individuals with disabilities to perform essential functions.

· Proven experience configuring, managing, and troubleshooting FortiGate firewalls, Cisco Catalyst switches, and wireless access systems.

· Strong understanding of core networking concepts and protocols (TCP/IP, DHCP, DNS, NAT, OSPF, and BGP).

· Familiarity with network segmentation, ACLs, and general security best practices.

· Experience using network monitoring and diagnostic tools (Wireshark and LogicMonitor).

· Ability to read, produce, and maintain network documentation and diagrams.

· Strong troubleshooting and problem-solving skills.

· Clear communication skills, both written and verbal.

· Ability to work independently and as part of a team.

· Experience supporting high-availability network environments.

EDUCATION & EXPERIENCE

· A minimum of 3 years of experience in network administration or a similar role.

· Certifications such as FortiNet NSE4 or higher, Cisco CCNA/CCNP.

SUPERVISORY RESPONSIBILITIES

WORK ENVIRONMENT
The work environment characteristics described here represent those an employee encounters while performing the essential functions of this job. Reasonable accommodation may be made to enable individuals with disabilities to perform essential functions. While performing the duties of this job, the employee is regularly required to use hands and reach with hands and arms, hear, and talk. The employee will be working and navigating on a computer. The employee occasionally is required to stand, sit, stoop, kneel, crouch, and walk. The employee may occasionally be required to lift and/or move up to 20 pounds. The work environment is usually moderate to loud.

*Description*
Position Overview
The Network Administrator (N.A.) plays a crucial role in maintaining and optimizing the network infrastructure. The N.A. is responsible for designing, implementing, and managing the company's network systems, ensuring security, reliability, and compliance with healthcare regulations. The position involves working with cutting-edge technologies, collaborating with various I.T. teams, and contributing to the company's overall technological strategy.
The N.A. has the opportunity to make a significant impact on the organization's digital infrastructure while working in a dynamic and fast-paced healthcare environment. This is a full-time position based at our corporate office in Addison, TX, reporting to the I.T. Director. This role requires on-site presence during regular business hours.
Key Responsibilities
*Design, implement, and maintain the company's network infrastructure, including LAN, WAN, and wireless networks
*Ensure robust network security through firewall management, VPN setup, and intrusion detection systems
*Implement and maintain network hardware and software, including routers, switches, and servers
*Monitor network performance, conduct capacity planning, and troubleshoot issues proactively
*Manage user accounts, permissions, and access rights across the network
*Ensure strict compliance with healthcare regulations (e.g., HIPAA) regarding data security and privacy
*Perform regular backups and implement disaster recovery procedures
*Provide technical support and training to end-users on network-related issues
*Stay updated on emerging network technologies and implement improvements
*Collaborate with other I.T. teams to integrate network systems with other infrastructure components
*Develop and maintain network documentation, including diagrams and standard operating procedures
*Participate in I.T. projects related to network expansion or upgrades
*Travel to contracted facilities - 10%
*Other duties as assigned
*Skills*
Cisco routers, Firewall, Router, Troubleshooting
*Additional Skills & Qualifications*
*Bachelor's degree in Computer Science, Information Technology, Network Engineering, or related field
*5+ years of experience in network administration, preferably in a healthcare setting
*Strong knowledge of network protocols, hardware, and software (e.g., TCP/IP, DHCP, DNS, VLANs)
*Proficiency in configuring and managing Cisco networking equipment
*Experience with network monitoring tools and performance optimization techniques
*Familiarity with cloud networking concepts and technologies (e.g., AWS, Azure, Google)
*Knowledge of network security best practices and compliance requirements in healthcare
*Certifications such as Cisco CCNA, CompTIA Network+, or MCSE are highly preferred
*Experience with healthcare-specific systems and regulations (e.g., EHR systems, HIPAA compliance)
*Strong problem-solving skills and ability to work under pressure
*Excellent communication skills, both written and verbal
*Ability to work in a fast-paced environment and handle multiple priorities
*Willingness to be on-call and work flexible hours when required
*Experience Level*
Intermediate Level
*Pay and Benefits*
The pay range for this position is $36.00 - $50.00/hr.
Eligibility requirements apply to some benefits and may depend on your job
classification and length of employment. Benefits are subject to change and may be
subject to specific elections, plan, or program terms. If eligible, the benefits
available for this temporary role may include the following:
* Medical, dental & vision
* Critical Illness, Accident, and Hospital
* 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available
* Life Insurance (Voluntary Life & AD&D for the employee and dependents)
* Short and long-term disability
* Health Spending Account (HSA)
* Transportation benefits
* Employee Assistance Program
* Time Off/Leave (PTO, Vacation or Sick Leave)
*Workplace Type*
This is a fully onsite position in Dallas,TX.
*Application Deadline*
This position is anticipated to close on Aug 23, 2025.
h4>About TEKsystems:

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About Us:

At RELI Group, our work is grounded in purpose. We partner with government agencies to solve complex challenges, improve public health, strengthen national security, and make government services more effective and efficient. Our team of over 500 professionals brings deep expertise and a shared commitment to delivering meaningful outcomes. Behind every solution is a group of experts who care deeply about impact-whether we're supporting data-driven decisions, modernizing systems or safeguarding critical programs.

Position Summary:

Seeking a Network Administrator to provide expertise to a federal client in support of their mission critical systems in defense of our Homeland.As a Network Admin, you will be responsible for implementing and maintaining our organization's network infrastructure. Your role will involve overseeing network administration, troubleshooting complex issues, and ensuring the performance, availability, and security of our network systems.

Responsibilities:

• Configure and maintain network devices such as routers, switches, firewalls, load balancers, and VPN concentrators
• Monitor network performance, identify bottlenecks, and implement optimization strategies to ensure optimal throughput and reliability
• Troubleshoot and resolve network issues using firewall logs, switch packet capture tools; engaging with cross-functional teams to leverage support and collaboration when necessary
• Conduct network capacity planning and bandwidth management to accommodate future growth and changing business needs
• Collaborate with other teams to integrate network infrastructure with cloud services, storage systems, and other IT components
• Stay updated on emerging technologies, industry trends, and best practices in networking and recommend their adoption as appropriate
• Create and maintain documentation related to network configurations, diagrams, standard operating procedures, and troubleshooting guides
• Provide technical leadership, guidance, and mentorship to junior network engineers
• Managing, monitoring, maintaining, and securing networks and tenant network segments that integrate the transport of networks and data
• Organizing, documenting, and managing the delivery of Network load balancing services
• Document and Manage Internet Protocol Addresses

• Seven (7)+ years of experience in a Network Administrator role or in a related field
• Active Secret clearance.
• Due to federal requirements, all candidates must be US Citizens without Dual Citizenship to another country.
• This is an on-site position at a government facility.
• Requires presence on-site five days per week in Annapolis Junction, MD.
• Candidates must reside within a commutable distance.
• Participation in a rotational on-call schedule for emergency page-outs is required.
• Five (5) or more years of experience in the following:
  • Cisco ASA
  • Cisco FirePOWER
  • Cisco Catalyst
  • Cisco Nexus
  • Avaya PoE Switches
  • F5 LTM and GTM load balancers
  • KEMP load balancers
  • Juniper SRX firewall
  • Extreme Network IPS
  • ION SAL Modem SA5610
  • Raritan Secure Console Server
  • Avocent KVM Switch
  • RedSeal Appliance SYS-1027R-WRF4+
  • SafeNet 7000
  • Avaya Media Gateway G450
  • IBM DataPower XML Firewall
  • SolarWinds - NPM, SAM, IPAM, Netflow
  • IBM Netcool
  
  
  
  

EEO Employer:

RELI Groupis an Equal Employment Opportunity / Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, national origin, ancestry, citizenship status, military status, protected veteran status, religion, creed, physical or mental disability, medical condition, marital status, sex, sexual orientation, gender, gender identity or expression, age, genetic information, or any other basis protected by law, ordinance, or regulation.

HUBZone:

We encourage all candidates who live in a HUBZone to apply. You can check to see if your address is located in a HUBZone by accessing theSBA HUBZone Map.

The annual salary range for this position is $60,000 to $80,000.Actual compensation will depend on a range of factors, including but not limited to the individual's skills, experience, qualifications, certifications, location, other business and organizational needs, and applicable employment laws. The estimate displayed represents the typical salary range for this position and is just one component of the total compensation package for employees. RELI Group provides a variety of additional benefits to its employees. For additional details on the benefits that RELI Group offers clickhere