Senior Civil Engineer - TS/SCI Poly

Leidos Holdings Inc

Reston, VA

JOB DETAILS
SALARY
$116,350–$210,325 Per Year
SKILLS
3D Modeling, Analysis Skills, Biological Processes, CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing), Civil Engineering, Computer Security, Cross-Functional, Defense Intelligence, Detail Oriented, Functional Analysis, Geology, Geomechanics, Geotechnical Engineering, Government, Government Contracts, HVAC, Information Models, Intelligence Community, Legal, Manufacturing/Industrial Processes, Mechanical, Electrical and Plumbing (MEP), Mentoring, Military, Network Integration, Open Source, Operational Support, Patents, Professional Engineer, Reverse Engineering, Rock Mechanics, Security Analysis, Security Clearance, Sensitive Compartmented Information (SCI), Simulation, Software Simulation, Structural Engineering, System Integration (SI), Technical Analysis, Technical Leadership, Technical Presentation, Technical Support, Technical/Engineering Design, Top Secret Clearance, United States Citizen, Workflow Analysis
LOCATION
Reston, VA
POSTED
9 days ago

Leidos is seeking an experienced Civil Engineer to support critical national security missions in Reston, Virginia. This role focuses on the assessment, reverse engineering, and characterization of complex above-ground and subterranean facilities located in denied-access environments.

The successful candidate will apply deep engineering expertise to reconstruct facility layouts, operational workflows, and supporting infrastructure associated with chemical, biological, radiological, and nuclear (CBRN) industrial processes. Leveraging a multidisciplinary approach, you will evaluate facility capabilities, identify vulnerabilities, and assess potential threat vectors to support high-priority mission objectives.

This position requires a highly analytical engineer who can develop sound technical assessments in situations where complete information is inherently unavailable. The ideal candidate combines creativity, intellectual curiosity, and engineering rigor with exceptional attention to detail. As a senior member of an interdisciplinary team of government and contractor professionals, you will provide technical leadership and subject matter expertise in a fast-paced, mission-focused environment within a government facility.

Primary Responsibilities

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 (UGFs) and deeply buried hardened structures.

3D Modeling & Simulation

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

Vulnerability & Resilience Assessments

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

Workflow & Infrastructure Analysis

Assess supporting infrastructure, operational workflows, and facility systems, including specialized HVAC, power distribution, utility networks, 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 Department of Defense stakeholders.

Technical Leadership

Serve as a recognized subject matter expert within your technical domain, providing engineering insight, mentorship, and guidance to multidisciplinary teams supporting mission requirements.

Required Skills, Education, Experience, and Clearance

  • Security Clearance: Must possess an active and in-scope TS/SCI clearance and be able to maintain it. Must be a U.S. Citizen. Additionally, will be expected to successfully pass a polygraph.
  • Demonstrated expertise in engineering principles, theories, and concepts, with the ability to apply them across a broad range of complex programs and mission challenges.
  • Bachelor's degree with 12+ years of relevant experience, or a Master's degree with 10+ years of relevant experience.
  • Relevant experience includes facility analysis, infrastructure vulnerability assessments, and structural engineering within commercial, Department of Defense, or Intelligence Community environments.
  • Industrial & Facility Focus: Proven experience analyzing chemical, nuclear, or biological industrial processes and their associated facility footprints, including both above-ground facilities and subterranean environments.
  • MEP Systems Knowledge: 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.

Preferred Qualifications

  • Weapons Effects & Survivability: Experience or training in blast mitigation, weapons effects, or structural hardening principles.
  • Geotechnical Engineering: Knowledge of rock mechanics, tunneling engineering, or geomechanics as applied to deeply buried underground facilities (UGFs).
  • BIM Expertise: Experience with Autodesk Revit or other Building Information Modeling (BIM) platforms for multidisciplinary coordination, MEP integration, and advanced facility visualization.
  • Advanced Simulation: Experience utilizing BIM data to support engineering simulations, blast effects analysis, or vulnerability assessment workflows.
  • Infrastructure Modeling: Experience with VENTSIM, ETAP, or similar infrastructure modeling and simulation software.
  • All-Source Information Evaluation: Demonstrated experience researching, assessing, and synthesizing diverse intelligence and technical sources-including classified intelligence, open-source information, and grey literature such as foreign technical journals, patents, and equipment catalogs-to support facility and infrastructure characterization.
  • Professional Engineer (PE) certification.
  • Military or defense-related experience.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:

June 19, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $116,350.00 - $210,325.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About the Company

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Leidos Holdings Inc

SAIC is a premier Fortune 500® technology integrator driving our nation's digital transformation. Our robust portfolio of offerings across the defense, space, civilian, and intelligence markets includes secure high-end solutions in engineering, IT modernization, and mission solutions. Using our expertise and understanding of existing and emerging technologies, we integrate the best components from our own portfolio and our partner ecosystem to deliver innovative, effective, and efficient solutions that are critical to achieving our customers' missions. We are a team of 26,000 strong driven by mission, united purpose, and inspired by opportunity. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.1 billion. For more information, visit saic.com.
COMPANY SIZE
10,000 employees or more
INDUSTRY
Computer/IT Services
FOUNDED
2013
WEBSITE
https://jobs.saic.com/