Principal Civil Engineer

Principal Civil Engineer (TS/SCI Required) – Reston, VA

Leidos seeks an accomplished Principal Civil Engineer to support high-priority national security missions in Reston, Virginia. The role focuses on assessment, reverse engineering, and characterization of complex above-ground and subterranean facilities in denied-access environments.

Key responsibilities include reconstructing facility layouts, operational workflows, and supporting infrastructure for chemical, biological, radiological, and nuclear (CBRN) industrial processes, identifying vulnerabilities, assessing threat vectors, and providing critical engineering insights to support mission planning and decision-making.

• Reverse Engineering & Characterization

  Analyze and characterize complex industrial processes, equipment configurations, and facility designs to determine functional attributes, operational capabilities, and mission relevance.

• Subterranean & Hardened Facility Analysis

  Evaluate the structural design, geological overburden, and survivability of underground facilities and deeply buried hardened structures.

• 3D Modeling & Simulation

  Utilize advanced CAD and engineering simulation tools to develop accurate 3D models of facilities, underground structures, floor plans, utility systems, and supporting infrastructure.

• Vulnerability & Resilience Assessments

  Conduct detailed structural and functional analyses to identify systemic weaknesses, single points of failure, and assess resilience of critical infrastructure against a range of threat vectors.

• Workflow & Infrastructure Analysis

  Evaluate facility support systems and operational workflows, including specialized HVAC systems, power distribution networks, utility infrastructure, and structural integrity considerations.

• Technical Reporting & Briefing

  Develop comprehensive engineering assessments, reports, and technical products in accordance with Intelligence Community standards; present findings and recommendations to senior government and DoD stakeholders.

• Subject Matter Expertise & Technical Leadership

  Serve as a recognized subject matter expert within your technical domain, providing authoritative guidance and supporting multidisciplinary teams with complex mission challenges.

• Active TS/SCI clearance and U.S. citizenship
• Demonstrated expertise in engineering principles, theories, concepts, and their application across highly complex programs and mission requirements
• Master's degree with 15+ years of relevant experience, or a Doctorate with 13+ years of relevant experience
• Relevant experience includes facility analysis, infrastructure vulnerability assessments, and structural engineering within commercial, DoD, or Intelligence Community environments
• Proven experience analyzing chemical, nuclear, or biological industrial processes and their associated facility footprints, including above-ground and subterranean environments
• Strong multidisciplinary understanding of Mechanical, Electrical, and Plumbing (MEP) system design, integration, and operational functionality within complex industrial or military facilities, including specialized containment, filtration, and backup power systems

• Experience or training in blast mitigation, weapons effects, or structural hardening principles
• Knowledge of rock mechanics, tunneling engineering, or geomechanics as applied to analysis of deeply buried underground facilities
• Experience with Autodesk Revit or other Building Information Modeling (BIM) platforms for coordination, MEP integration, and advanced facility visualization
• Experience utilizing BIM data to support engineering simulations, blast effects analysis, or vulnerability assessment workflows
• Experience with VENTSIM, ETAP, or similar infrastructure modeling and simulation software
• Demonstrated experience researching, assessing, and synthesizing diverse intelligence and technical sources to support facility and infrastructure characterization
• Professional Engineer (PE) certification
• Military or defense-related experience

Pay range: $ – $. Compensation will also consider responsibilities, education, experience, skills, and internal equity. Benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement.

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.