Network Engineer CMMC

Job ID: 113904
Location: St. Louis, Missouri  [On-Site]
Category: Infrastructure
Employment Type: Contract
Date Added: 11/06/2026
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Role Summary

The Senior CMMC Network Engineer will design, implement, secure, and support enterprise network infrastructure across LAN, WAN, wireless, data center, and cloud environments. This role focuses on building resilient, segmented network architectures that meet CMMC, NIST SP 800-171, CUI protection, and related compliance requirements. This is a three-month contract position based in Portland, Oregon, with occasional on-site support required.

Responsibilities

  • Design, implement, and maintain enterprise LAN, WAN, wireless, data center, and cloud network infrastructure.
  • Support network architecture aligned with CMMC, NIST SP 800-171, and CUI protection requirements.
  • Lead Cisco Software-Defined Access (SDA) design and implementation, including DNA Center, TrustSec, Security Group Tags, and network segmentation.
  • Configure and optimize routing and switching technologies, including SD-WAN, BGP, OSPF, EIGRP, VLANs, STP, HSRP, and VRRP.
  • Configure and support firewalls, VPNs, access controls, encryption, logging, and other network security controls.
  • Design and maintain secure network environments supporting regulated or sensitive data.
  • Lead network upgrades, migrations, circuit turn-ups, and infrastructure projects.
  • Design and support AWS and Azure networking, including VPCs, Transit Gateway, VNets, peering, route tables, security groups, NSGs, and Azure Firewall.
  • Implement secure hybrid connectivity using technologies such as IPsec VPNs, AWS Direct Connect, and Azure ExpressRoute.
  • Monitor network health, troubleshoot performance and availability issues, and perform root cause analysis.
  • Maintain network diagrams, standards, runbooks, security documentation, and compliance artifacts.
  • Provide technical leadership and mentorship while supporting operational and on-call activities as needed.

Qualifications

  • Relevant education, training, certifications, or equivalent practical experience.
  • 7+ years of hands-on enterprise network engineering experience.
  • Experience supporting CMMC, NIST SP 800-171, DFARS, or similar cybersecurity compliance requirements.
  • Strong Cisco routing and switching expertise, including TCP/IP, subnetting, DNS, DHCP, and InfoBlox.
  • Experience with WAN technologies including DMVPN, SD-WAN, dedicated internet access, and broadband services.
  • Experience with Cisco and/or Meraki wireless networking.
  • Experience with Palo Alto, Cisco ASA, Cisco FTD, or comparable enterprise firewall technologies.
  • Experience with VPN solutions and network segmentation in regulated environments.
  • Experience designing and supporting AWS and Azure networking and secure hybrid connectivity.
  • Experience contributing to System Security Plans, Plans of Action and Milestones, assessment documentation, or similar compliance artifacts.
  • Strong troubleshooting, communication, collaboration, stakeholder management, and technical leadership skills.
  • CMMC, CCNP, CCIE, PCNSE, Fortinet, SD-WAN, network automation, or NAC experience is preferred.

Publishing Pay Range: $80.00 – $110.00 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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