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631 principal engineer jobs at 187 companies in Frederick, MD

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Principal Engineer
Annapolis Junction or Laurel
$50k-$290k/yr OnsiteFull Time
The Swift Group: Providing engineering and cybersecurity services for national security missions.
15+ YOEProvide system engineering oversight for HPC environments: configure and maintain Linux clusters, support users, develop documentation, coordinate testing, use GitLab/GitLab CI; minimum 15 years technical experience and current government clearance with polygraph.
Linux, HPC, GitLab, GitLab CI
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Senior Principal Mission Engineer
Chantilly, Virginia, United States
OnsiteFull Time
OASYS
OASYS: Provides technology services and products for government and defense.
15+ YOESenior Principal Mission Engineer with 15+ years in DoD/NRO space programs; OPIR/space ISR experience; MBSE; TS/SCI clearance preferred.
MATLAB, STK, MODTRAN, MBSE, Cameo
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Senior Principal Engineer
Washington, District of Columbia, United States
$159k-$191k/yr HybridFull Time
Edison Electric Institute
Edison Electric Institute: Association representing U.S. investor-owned electric companies.
10+ YOEBachelor's in electrical engineering, 10+ years in electric power planning/operations/reliability, NERC knowledge, strong communication and consensus-building, Microsoft Office proficiency.
Microsoft Word, PowerPoint, Microsoft Excel, Microsoft Outlook, Clear Company
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Principal Engineer (Bridges)
Arlington, Virginia, United States
HybridFull Time
Arlington County
Arlington County: Provides essential public services and infrastructure to Arlington residents.
2+ YOEBachelor’s degree in Engineering; 2+ years bridge program management/rehabilitation project experience; driver’s license; preferred PE license and NBIS program experience.
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3w
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Associate Principal Engineer
Dulles, Virginia, United States
OnsiteFull Time
Southland Industries
Southland Industries: National expert in mechanical, electrical, and plumbing building systems.
12+ YOE5+ MgmtBachelor's degree in engineering, PE license, 12+ years relevant experience with 5+ years managing people; expert HVAC/plumbing systems knowledge; strong communication and CADD/Microsoft skills.
CADD, Microsoft Office, Microsoft Excel
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Principal Engineer
Dahlgren or Washington
OnsiteFull Time
Basic Commerce and Industries
Basic Commerce and Industries: Engineering and technical solutions for defense and aerospace programs.
25+ YOE25+ years US Navy or equivalent experience with Aegis/ABMD/SSDS/IAMD/NIFC-CA or similar systems, advanced writing/speaking skills, 2 years Microsoft Office experience, US citizenship and eligibility for access to classified information.
Aegis Combat System, Aegis Ballistic Missile Defense (ABMD), NIFC-CA, Microsoft Word, Microsoft Excel, Microsoft PowerPoint
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Principal Antenna Test / Sr Principal Antenna Test Engineer
Sykesville, Maryland, United States
$109k-$163k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
5+ YOEBS/MS in Electrical Eng; 5+ years (Principal) or 8+ years (Sr Principal) in RF/test; RF test equipment; software dev in C#, VB, MATLAB; DoD Secret clearance with SAP; US citizenship.
Oscilloscope, Power meter, Spectrum analyzer, Signal generator, C#, Visual Basic, MATLAB
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Principal Mechanical Engineer
Sterling, Virginia, United States
OnsiteFull Time
Trident Systems
Trident Systems: Develops high-performance electronics for space and defense.
9+ YOESenior mechanical engineer with 9+ years experience in aerospace/space hardware, ABET degree, CAD/FEA expertise, PDM experience, and cross-disciplinary collaboration.
SolidWorks, ANSYS Workbench, PDM
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4w
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Senior Principal Software Engineer
Annapolis Junction, Maryland, United States
$183k-$193k/yr HybridFull Time
General Dynamics Mission Systems
General Dynamics Mission SystemsNYSE: GD: Designs and manufactures defense and mission-critical technology solutions.
8+ YOEBachelor's in Software Engineering or related STEM with 10+ years (or Master's with 8+ years), ability to obtain TS/SCI clearance, experience across full SDLC, technical leadership, Kubernetes/containers, CI/CD and embedded/Linux development.
Kubernetes, Helm, containerd, Docker, Podman, MCP (Model Context Protocol)
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Sr Principal Sys Engineer - D5LE2
Rockville, Maryland, United States
$150k-$254k/yr HybridFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Designs and manufactures advanced defense and aerospace systems.
10+ YOEBachelor's in engineering, 10+ years systems engineering in DoD acquisition with 5+ years on ACAT 1 strategic deterrence programs; MBSE, DoD 5000 knowledge; strong communication, risk management, and documentation skills; must be U.S. person and able to obtain Secret clearance.
MBSE, DoD 5000 Adaptive Acquisition Framework
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Principal Engineer, Mission Software
Arvada or Los Angeles or San Francisco or Seattle or Washington
HybridFull Time
Quindar
Quindar: Cloud-native software for automated satellite mission operations.
8+ YOE3+ MgmtLead complex software and systems engineering in aerospace/defense; architecture focus; leadership; government programs; security clearance readiness.
Programming, Software Architecture, Distributed Systems, APIs, Operator tooling, Mission-critical applications
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Senior Principal Reverse Engineer
Arlington, Virginia, United States
OnsiteFull Time
Nightwing
Nightwing: Provides advanced cyber and intelligence solutions for national security.
10+ YOEUS Citizenship; active TS/SCI clearance; DHS suitability; 10+ years hardware reverse engineering or embedded systems analysis.
IDA Pro, Ghidra, Binary Ninja, Python, C, Assembly
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Engineer 2A/Engineer 3B/Principal Engineer
Kennett Square or Baltimore
$93k-$168k/yr OnsiteFull Time
Constellation Energy
Constellation EnergyNASDAQ: CEG: Produces carbon-free electricity and supplies energy to customers.
2+ YOEBachelor's degree in engineering and 2+ years related experience (higher levels require 5–10 years); maintain access and medical requirements; preferred leadership and advanced degrees for senior/principal roles.
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Senior Principal Azure Engineer
Washington, District of Columbia, United States
$157k-$213k/yr HybridFull Time
GDIT
GDITNYSE: GD: Delivers IT and mission services to government agencies.
10+ YOEMust possess active Secret clearance and US citizenship; 10+ years experience; expert Azure networking, IaC/DevOps (Terraform, Bicep, ARM), Azure DevOps/GitHub Actions, Ansible/PowerShell; Azure AD and Azure Monitor experience.
Microsoft Active Directory (AD), Azure DevOps, Azure Monitor, Terraform, Bicep, ARM templates, GitHub Actions, Ansible, PowerShell, Azure Active Directory, Microsoft Visio
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Principal Systems Engineer (Onsite)
Sterling, Virginia, United States
$118k-$225k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: RTX provides advanced aerospace and defense systems and services.
8+ YOERequires STEM degree with 8+ years experience or advanced degree with 5+ years; U.S. DoD Secret clearance; U.S. citizenship.
Python, MBSE, DOORS, JAMA, JIRA, Confluence, MIL-STD-810, MIL-STD-461, MIL-STD-704
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Senior Engineer (Engineer III) / Principal Engineer (Engineer IV) – Propulsion
Rockville, Maryland, United States
$160k-$200k/yr OnsiteFull Time
Quantum Space
Quantum Space: Developing maneuverable spacecraft platforms for defense and commercial missions.
7+ YOESenior or Principal propulsion engineer with 7-10+ years, leadership of engineering teams, strong project management, and aerospace/system design expertise.
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2w
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Principal Engineer
Beltsville, Maryland, United States
$140k-$190k/yr OnsiteFull Time
Ion Storage Systems
Ion Storage Systems: Develops and manufactures high-performance solid-state ceramic battery technology.
10+ YOE10+ years engineering experience, B.S. (required) in mechanical/electrical/mechatronics, strong hands-on hardware and automation experience, 3D CAD skills, prototype line and equipment build experience, ability to lead root-cause investigations and mentor engineers.
3D CAD
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Sr. Principal Engineer - Wet
Franklin or McLean or North America
HybridFull Time
Mars
Mars: Global manufacturer of confectionery, snacks, and pet care products.
8+ YOEBachelor's in food science/technology/engineering, 8+ years' relevant experience, deep Wet technology knowledge (product design, process, formulation), technical leadership, prototype development and stakeholder influencing.
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2mo
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Principal Software Engineer
Annapolis Junction, Maryland, United States
$207k-$266k/yr OnsiteFull Time
Intelliforce
Intelliforce: Provides engineering and technical solutions for the intelligence community.
12+ YOETop Secret clearance with Full Scope Polygraph; US citizenship; 12+ years of software engineering; BS or higher in Computer Engineering/CS; 5 years in SIGINT/IA/IT domains; expert Java (17+), REST, Spring Boot, SOLID OO design; leadership and mentoring.
Java, Spring Boot, REST, MongoDB, Docker, Kubernetes, Elasticsearch, Logstash, Kibana, PKI, TLS, SSL, Confluence, Jira
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Principal Software Engineer
Arlington, Virginia, United States
OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
Extensive software engineering leadership; delivery of large-scale distributed systems; cloud, AI/data platforms; strong communication and mentorship.
AWS, Cloud, DevOps, AI tooling, LLMs, distributed systems
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