Sr Network Engineer

Job ID: 113791
Location: Washington, District Of Columbia  [On-Site]
Category: Infrastructure
Employment Type: Contract
Date Added: 10/12/2026
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Role Summary

This position provides advanced network engineering support for complex enterprise environments, with a focus on routing, switching, network modernization, and infrastructure reliability. The role designs, implements, troubleshoots, and optimizes network solutions while supporting technical refresh and migration initiatives within secure environments.

Responsibilities

  • Design, implement, maintain, and support enterprise routing and switching environments.
  • Support network refresh, replacement, migration, and modernization initiatives.
  • Troubleshoot complex network issues involving VLANs, trunking, Spanning Tree Protocol (STP), OSPF, BGP, QoS, LACP, ARP, and related technologies.
  • Configure, manage, and optimize Cisco routing and switching technologies, including Cisco ISE and Catalyst Center.
  • Apply network security principles and established standards to support secure network operations.
  • Collaborate with cross-functional technical teams to coordinate network configurations, upgrades, migrations, and troubleshooting activities.
  • Develop and maintain network architecture, configuration, implementation, and troubleshooting documentation.
  • Monitor and analyze network performance, availability, capacity, and security.
  • Support capacity planning and performance optimization for enterprise network environments.
  • Follow applicable security, change management, and compliance requirements.

Qualifications

  • 10 to 12 years of hands-on network engineering experience with a strong focus on routing and switching.
  • Strong knowledge of Cisco routing and switching technologies, including Cisco ISE and Catalyst Center.
  • Experience supporting network refresh, migration, modernization, and equipment replacement initiatives.
  • Advanced troubleshooting experience with VLANs, trunking, STP, OSPF, BGP, QoS, LACP, ARP, and related networking technologies.
  • Strong understanding of network security concepts applicable to secure enterprise environments.
  • This position requires eligibility for a U.S. Government security clearance. In accordance with federal law, U.S. citizenship is required.
  • DoD 8570 IAT Level II certification required.
  • Availability to work on-site daily.
  • Strong written and verbal communication skills.
  • Relevant education, training, certifications, or equivalent practical experience.

Publishing Pay Range: $92.00 – $102.00 USD Hourly

This position is based in office and requires employee to work on-site.

About GDH:
At GDH, we believe in the power of people and the importance of caring. Our culture statement, “We care about people,” isn’t just a tagline – it’s the core of everything we do. GDH is a premier staffing and talent solutions company dedicated to helping businesses find the best talent and assisting job seekers in finding their dream jobs.

Who We Are:
GDH, founded in 2001, has grown into a leader in providing staffing solutions across various industries. We specialize in IT across several sectors, connecting top talent with leading enterprises. As a Best of Staffing firm recognized for excellence in client, employee, talent, and women’s services, we pride ourselves on our commitment to quality and service.

GDH Benefits

GDH offers a range of employee benefits that are designed to promote well-being and help maintain a healthy work-life balance. These comprehensive benefits cover various aspects of an employee’s life and aim to enhance their overall experience with the company. Our health benefits include three medical insurance options with access to KISx Card, Zero Card, and HealthJoy concierge services. Other plan offerings include dental, vision, life, disability, supplemental insurance, and pet insurance plans. Enjoy additional perks like holiday pay, 401(k) plan, direct deposit, an employee referral program, work-life balance benefits, a Wellbeats membership, a discounted gym membership program, and more!  For more detailed information on benefits, please go to GDH’s website under the tab for candidates.

GDH provides equal employment opportunities (EEO) to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, gender, sex (including pregnancy), sexual orientation, gender identity, national origin, age, disability, genetic information, marital status, ancestry, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable federal, state, and local laws. Applicants with disabilities who require an accommodation or assistance in applying and/or for interviewing, please contact our HR Department.

Please visit our notice of collection for California applicants.

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