Senior Network Engineer – Secure MDM & Cloud Networking

SAIC; Arlington (VA); On-site; USD 120,000 - 160,000; Full time

Job summary

SAIC has an opening for a Senior Network Engineer in Arlington, VA. The role will architect, implement, and manage the enterprise network to support US Marshals Service missions, combining security, performance, and reliability.

You will lead design efforts, install Cisco routers/switches, VoIP, and data center networks, while aligning with STIG and NIST controls. Collaboration with cross-functional teams and government cloud integration are key aspects of this position.

Qualifications

• Bachelor's degree in IT-related field required.
• Minimum 4+ years of hands-on experience with Cisco routers, switches, and LAN/WAN/WLAN facilities and protocols.
• Active Secret clearance required; US citizenship is required for USMS suitability.

Responsibilities

• Lead network design, project planning, budget estimations, lifecycle management, and migration/rollback strategies from planning through implementation.
• Install, configure, optimize, and maintain Cisco routers, switches, VoIP, Data Center, and Cisco Wireless networks using advanced protocols (BGP, OSPF, EIGRP, MPLS, VRF) and secure cloud network services.
• Support enterprise unified communications infrastructure using Cisco CUCM, Unity Connection, SIP, CUBE, SRST, and VoIP QoS.
• Design and support data center networking solutions (Cisco Nexus, VXLAN, ACI, Virtual Switching, UCS) and bridge hardware to government cloud environments (AWS GovCloud / Azure Government).
• Architect secure network zones, gateways, and access controls to safely support traffic flow from enterprise MDM platforms (Intune, Workspace ONE, or MobileIron).
• Configure and maintain Cisco Identity Services Engine (ISE), 802.1X, and Network Access Control (NAC) to regulate perimeter access for mobile assets.
• Implement cybersecurity best practices, network segmentation, Layer 2 security, and DLP in compliance with STIG, NIST 800-53, RMF, and Zero Trust directives.
• Engineer and troubleshoot secure site-to-site VPNs, TLS, TACLANEs, and encrypted transport layers for field agents.
• Support vulnerability remediation, security audits, and proactive monitoring/automation using SolarWinds, Cisco DNAC, SNMP, NetFlow, REST APIs.
• Create and maintain 100% current network diagrams, topology maps, SOPs, engineering standards, and change methodologies.
• Serve as technical liaison and trusted advisor to customers and stakeholders; translate technical concepts into business language.
• Lead incident response, root cause analysis, backup systems, and disaster recovery planning/testing to maintain SLA uptimes.
• Provide guidance and conduct peer reviews for junior engineers and share knowledge quarterly.

Skills

Cisco routers & switches

LAN/WAN/WLAN protocols

Active Secret clearance

Education

Bachelor's degree in IT-related field

CCNP Enterprise certification

Tools

Cisco Nexus

Cloud integration (AWS GovCloud, Azure Government)

Job description

SAIC has an opening for a Senior Network Engineer in Arlington, VA. The role will architect, implement, and manage the enterprise network to support US Marshals Service missions, combining security, performance, and reliability.

You will lead design efforts, install Cisco routers/switches, VoIP, and data center networks, while aligning with STIG and NIST controls. Collaboration with cross-functional teams and government cloud integration are key aspects of this position.