Senior Civil Engineer - TS/SCI Poly Required

Koitecc Solutions; Reston, Northern (VA, KY); Hybrid; USD 116,000 - 210,000; Full time

Job summary

Leidos in Reston, Virginia seeks an experienced Civil Engineer to support national security missions by analyzing and characterizing complex facilities in denied-access environments. You will apply advanced engineering to reconstruct layouts, assess infrastructure, and model systems for resilience, delivering rigorous reports to senior government and DoD stakeholders.

The role demands leadership within an interdisciplinary team, strong attention to detail, and the ability to work in

Qualifications

• Security clearance: active TS/SCI polygraph clearance and U.S. citizenship required.
• Demonstrated engineering principles across complex programs and mission challenges.
• Bachelor's degree with 12+ years or Master's with 10+ years of relevant experience.
• Experience includes facility analysis, infrastructure vulnerability assessments, and structural engineering in DoD/IC environments.
• Industrial & facility focus: experience with chemical, nuclear, or biological processes and facility footprints, including above-ground and subterranean environments.
• MEP systems knowledge: design, integration, and operation of HVAC, electrical, plumbing, containment, filtration, and backup power in complex facilities.

Responsibilities

• Reverse engineer and characterize complex industrial processes and facility designs.
• Assess subterranean and hardened facilities' design, geology, and survivability.
• Create 3D facility models using CAD and simulation software.
• Perform vulnerability and resilience assessments of critical infrastructure.
• Analyze workflows, utility networks, and facility systems for operational integrity.
• Prepare engineering assessments and reports per Intelligence Community standards; present to senior stakeholders.
• Provide technical leadership and mentorship within an interdisciplinary team.

Skills

TS/SCI clearance

U.S. citizenship

Engineering principles

Facility analysis

MEP systems knowledge

Education

Bachelor's + 12+ years

Master's + 10+ years

Tools

CAD software (3D modeling)

Engineering simulation software

Job description

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: Candidates for consideration must possess an active and in-scope TS/SCI polygraph clearance and the ability to maintain it while in this role. Must be a U.S. Citizen.
• 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.

Original Posting

August 14, 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 Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [e-mail].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

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.