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Mid-Level OT/IT Network & Cybersecurity Engineer

Leidos McLean, VA

McLean, VA

Today

$87k - $157k/yr Full time Certificate Management Industrial Cybersecurity Information Security

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Job Description

Leidos is hiring a Mid-Level OT/IT Network & Cybersecurity Engineer for the Saxton Lab Team at FHWA STOL in McLean, VA (onsite), focused on operational technology and IT network/testbed infrastructure and the lab’s OT/ICS cybersecurity posture.

Responsibilities

Design, build, and operate OT/IT networks for testbeds, including VLAN segmentation, firewall/ACL, routing, wireless distribution, and the fiber/copper cabling plant
Support connectivity from the lab testbed backhaul to field-deployed roadside units (RSUs), edge nodes, and remote sites, including connected-vehicle links (C-V2X PC5/Uu, 5G NR, Wi-Fi)
Own day-to-day testbed and Smart Garage operations, covering commissioning and maintenance of RSUs, onboard units (OBUs), signal controllers, edge platforms, and network hardware
Troubleshoot connectivity and performance across lab and field deployments, including latency, protocol behavior, and hardware issues
Maintain accurate network documentation and ensure reliable time synchronization for experiments using PTP/IEEE 1588, NTP, and GPS
Enable dependable edge-to-analytics data movement so experiments produce reproducible results
Establish and maintain a lab-wide OT security posture using relevant frameworks (for example NIST SP 800-82/800-53) with judgment for research or task-order needs
Apply defense-in-depth segmentation for OT environments using the Purdue Model or IEC 62443, including constructs such as an IT/OT DMZ and bastion hosts with filtering controls
Stand up and operate V2X security capabilities, including PKI and SCMS credentialing
Perform OT-appropriate vulnerability assessment and run intrusion/anomaly monitoring, coordinating remediation with program security
Build and maintain a security environment that supports transportation cybersecurity research, keeping practical incident-response procedures and cybersecurity reviews current
Support concurrent R&D projects by translating research requirements into testbed configurations and keeping environments in known, repeatable states
Support test scenarios and instrumentation for in-vehicle and roadside activities, including technical preparation and execution of lab tours, live demonstrations, and field testing
Maintain the lab safety posture by ensuring OT/IT/cybersecurity work follows safety procedures during routine operations, testing, and special events, including change-control for reconfigurations, deployments, and firmware updates
Treat OT cybersecurity as safety-critical and apply domain-specific safety practices (RF, electrical/cabling, on-road and closed-course protocols), partnering with facilities on power, environmental controls, and cable management

Requirements

Ability to work full-time on-site in McLean, VA
Ability to obtain and maintain a Public Trust clearance (requires three years’ continuous U.S. residency) and a valid driver’s license
Bachelor’s degree in a related technical field (Electrical/Computer Engineering, Network Engineering, Computer Science, IT, or similar) with 4–8 years hands-on experience in OT/IT networking, R&D, industrial, or field-deployed systems
Alternative: technical associate’s degree with 7+ years relevant hands-on experience
Experience designing, deploying, and administering OT or IT/OT converged networks, including managed switching/routing, VLAN segmentation, VPN, and firewall rules, in OT/ICS or research-testbed environments with field-deployed devices (required: 4+ years)
Infrastructure fundamentals including fiber/copper cabling, network/RF diagrams, and time synchronization using NTP, PTP/IEEE 1588, and GPS
Comfort with Linux for device administration and scripting
Working knowledge of C-V2X (PC5/Uu) for connected-vehicle communication, or strong aptitude to learn quickly
Holistic OT/ICS security understanding, including applying NIST SP 800-82/800-53, Purdue Model, and IEC 62443 in a transportation research environment with appropriate judgment
Familiarity with OT threat landscape and PKI/SCMS for V2X credentialing
Awareness of how cybersecurity relates to functional safety in automated systems
Strong written and verbal communication for documentation and stakeholder briefings, with ability to manage competing priorities
Ability to perform hands-on work in lab, garage, and field settings, including lifting up to 50 lbs and occasional off-hours support for testing and events (with reasonable scheduling flexibility)

Required / Relevant Technologies

Networking: VLAN segmentation, firewall/ACL, routing, wireless distribution, fiber/copper cabling, VPN
Time sync: PTP/IEEE 1588, NTP, GPS
Connected vehicle: C-V2X PC5/Uu, 5G NR, Wi-Fi, SAE J2735, SAE J3161
OT security frameworks and architecture: NIST SP 800-82, NIST SP 800-53, IT/OT DMZ, bastion hosts, Purdue Model, IEC 62443
V2X security: PKI, SCMS credentialing
Security operations: vulnerability assessment, intrusion/anomaly monitoring
Administration: Linux
OT monitoring tools and platform ecosystems (listed): Claroty, Dragos, Nozomi, Savari, Cohda Wireless, Commsignia, Kapsch, SANS ICS515
Certifications (listed): CCNA, CCNP, Security+, CySA+, GICSP
Other platform brand references (listed): SAE J2735 and SAE J3161 (C-V2X)

Benefits

Health, dental, and vision insurance
Retirement plan
Paid time off

Compensation

Pay range: USD 87,100 - 157,450 per year
Salary range: $110,000 - $130,000 per year (commensurate with experience)

Preferred Qualifications

Certifications such as CCNA/CCNP, Security+, CySA+, or GICSP
ICS/SCADA security training (for example SANS ICS515)
Hands-on RSU platform experience (Savari, Cohda Wireless, Commsignia, Kapsch) with SCMS enrollment
C-V2X (PC5) and 5G NR
OT monitoring tools experience with Claroty, Dragos, or Nozomi
Experience supporting federally funded R&D or government contracting

Location: McLean, VA (onsite)

Experience: 4+ years (minimum)

Education: Bachelor’s degree (or technical associate’s degree) in a related technical field

Original posting date: July 8, 2026

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