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Senior Network Engineer (Classified Systems Support)

Location: Suffolk, VA & Quantico, VA

Clearance Required: Active DoD Secret Clearance (minimum)

Employment Type: Full-Time

Position Overview

We are seeking an experienced Senior Network Engineer to support the sustainment, maintenance, troubleshooting, and operational readiness of secure classified communications environments. This role requires a hands-on technical professional with expertise across networking, cybersecurity, and systems administration who can support mission-critical infrastructure within highly secure environments.

The ideal candidate will possess strong experience supporting complex enterprise networks, security appliances, virtualization platforms, and identity management solutions while ensuring compliance with Department of Defense cybersecurity and configuration management requirements.

Key Responsibilities

• Provide ongoing sustainment, maintenance, troubleshooting, and optimization of secure enterprise network environments.
• Support virtualized infrastructure and complex multi-platform network architectures.
• Deploy, configure, test, and maintain network and security appliances.
• Install, configure, and support routers, switches, firewalls, VPN gateways, wireless infrastructure, and related network technologies.
• Perform configuration management and ensure operational readiness of network systems.
• Investigate and resolve network, system, and security incidents in classified environments.
• Conduct engineering evaluations, technology assessments, and performance analysis.
• Support Public Key Infrastructure (PKI), including certificate deployment, installation, renewal, and lifecycle management.
• Configure and troubleshoot IPsec communications and secure routing solutions.
• Implement and manage firewall rules, access control lists (ACLs), and network segmentation strategies.
• Support Layer 3 and Layer 7 load balancing technologies.
• Configure and maintain enterprise routing and switching protocols.
• Implement and support 802.1X authentication and network access control solutions.
• Utilize network monitoring, management, and security tools to maintain system performance and compliance.
• Perform vulnerability scanning and support remediation activities.
• Implement system and network hardening procedures in accordance with DoD security standards and best practices.
• Develop technical documentation, reports, and presentations for stakeholders.
• Participate in on-call support and incident response activities as required.

Required Qualifications

• Active DoD Secret Clearance.
• Minimum 8 years of Network Engineering experience supporting Cisco and/or Juniper environments.
• Minimum 2 years of experience supporting DoD enterprise environments.
• Strong understanding of:
  • Enterprise network architecture
  • Network and security appliances
  • Application services
  • Virtualized environments
  • Network management and monitoring platforms
  • Network troubleshooting methodologies
  • Performance optimization
• Proven experience configuring, monitoring, maintaining, and troubleshooting network infrastructure.
• Strong knowledge of switching technologies and network operations.
• Experience with:
  • Cisco routing and switching
  • Cisco Identity Services Engine (ISE)
  • Juniper networking solutions
  • Palo Alto firewalls
  • Aruba networking technologies
• Experience supporting:
  • Active Directory
  • Domain Controllers
  • DNS
  • DHCP
  • PKI integration
  • VMware vSphere environments
• Ability to work effectively with both technical and non-technical stakeholders.

Preferred Qualifications

• Experience supporting secure classified communications environments.
• Experience with:
  • F5 Load Balancers
  • Wi-Fi technologies including 802.11ac and 802.11ax
  • PKI and certificate-based authentication solutions
  • Enterprise network access control implementations
• Familiarity with virtualization technologies and systems administration.
• Experience supporting U.S. Navy, Marine Corps, or broader Department of Defense missions.
• Active DoD 8570/8140 compliant certification such as:
  • Security+
  • CCNA
  • CCNP
  • CISSP

Top Technical Skills

• Cisco Networking
• Cisco ISE
• Juniper Networks
• Palo Alto Firewalls
• Aruba Networks
• PKI Infrastructure
• Active Directory
• VMware vSphere
• Routing & Switching
• Firewall Administration
• Network Monitoring & Security Tools
• Vulnerability Management
• Windows Server Administration

Why Join Us?

This position offers the opportunity to support critical national security missions within highly secure enterprise environments. You will work with cutting-edge networking and cybersecurity technologies, help build and sustain advanced communications capabilities, and contribute to projects with long-term stability and growth potential.

Job Type & Location

This is a Contract position based out of Suffolk, VA.

Pay and Benefits

The pay range for this position is $60.00 - $80.00/hr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.

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 Suffolk,VA.

Application Deadline

This position is anticipated to close on Sep 8, 2026.

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.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.