Senior Network Engineer Secret Clearance Jobs (NOW HIRING)

TEKsystems is seeking a Senior Network Engineer with an active Top Secret clearance to support a Secure Development Environment (SDE) deployment in Richardson, TX. This effort supports classified engineering workloads associated with Department of Defense (DoD) programs. The network architecture and engineering design have already been completed. This position is focused on implementation, configuration, integration, validation, troubleshooting, and operational support of the network environment. This engineer will serve as the primary networking resource on the deployment team and must be capable of independently configuring and troubleshooting enterprise Cisco infrastructure with minimal oversight. The engagement is projected to last up to 12 months, with an initial 6-month funding period and strong extension potential.

What You'll Do

• Deploy and configure enterprise Cisco networking infrastructure based on existing architecture documentation and engineering standards.
• Configure and validate routing and switching environments across multiple classified locations.
• Implement and support:
  • OSPF
  • BGP
  • EIGRP
  • VLANs
  • Port Channels
  • Spanning Tree
  • QoS
• Configure Cisco Catalyst, Nexus, and related enterprise networking platforms.
• Implement network segmentation and security controls in accordance with established requirements.
• Support integration of networking infrastructure with VMware and virtualized environments.
• Troubleshoot complex routing, switching, connectivity, and performance issues.
• Validate configurations against engineering documentation and operational requirements.
• Support system hardening and configuration baselines in alignment with security requirements.
• Maintain configuration documentation, IP management records, and operational runbooks.
• Collaborate closely with infrastructure, cybersecurity, and systems engineering teams during deployment activities.
• Serve as the Senior networking resource during installation, configuration, testing, and troubleshooting efforts.

What We're Looking For

Required

• Active Top Secret security clearance.
• 8+ years of hands-on enterprise network engineering experience.
• Strong Cisco networking background.
• Strong experience with:
  • OSPF
  • BGP
  • EIGRP
  • VLANs
  • Layer 2 / Layer 3 networking
  • Enterprise switching
  • Enterprise routing
• Experience configuring Cisco enterprise infrastructure without requiring architectural guidance.
• Proven ability to troubleshoot complex networking issues independently.
• Experience supporting large enterprise environments.
• Experience working from architecture diagrams, implementation plans, and engineering documentation.
• Ability to operate as the primary networking SME on a deployment team.

Preferred

• CCNP certification.
• VMware NSX familiarity.
• Experience supporting classified environments.
• Experience supporting DoD, IC, Aerospace, or Defense programs.
• Understanding of DISA STIGs, RMF, and NIST 800-53.
• Network automation experience (Ansible, Python, Cisco DNA Center).
• Security+, CASP+, CISSP, or equivalent certification.

This is a Contract position based out of Richardson, TX.

The pay range for this position is $70.00 - $75.00/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)

This is a fully onsite position in Richardson,TX.

This position is anticipated to close on Aug 4, 2026.

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.

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.