216 principal engineer jobs at 70 companies in Smithsburg, MD
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Associate Principal Engineer
Dulles, Virginia, United States
OnsiteFull Time
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
2mo
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Principal Antenna Test / Sr Principal Antenna Test Engineer
Sykesville, Maryland, United States
$109k-$163k/yr OnsiteFull Time
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
6d
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Sr. Principal Engineer - Autonomy
Frederick, Maryland, United States
$104k-$174k/yr OnsiteFull Time
6+ YOEBachelor's degree in engineering or related field and 6+ years of related experience; advanced C++ and ROS2 proficiency, autonomous systems experience, Ubuntu 22.04+, and distributed systems expertise.
C++, ROS2, Ubuntu 22.04+, graphical user interfaces, inter-process messaging
1mo
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Sr Principal Sys Engineer - D5LE2
Rockville, Maryland, United States
$150k-$254k/yr HybridFull Time
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
3w
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Principal/Sr Principal Cyber Systems Engineer
Dulles or Gilbert
$125k-$188k/yr OnsiteFull Time
5+ YOERequires TS/SCI clearance, 5+ years cyber systems experience (Principal) or 8+ (Sr Principal); RMF, DISA STIG, ACAS/Nessus, vulnerability remediation, system hardening, secure design for space systems.
DISA Automated Security Compliance Assessment Solution (ACAS), Tenable NESSUS, Fortify, Docker, Windows, Red Hat, SIEM tools, DISA Security Technical Implementation Guide (STIG)
3mo
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Principal Systems Engineer (Onsite)
Sterling, Virginia, United States
$118k-$225k/yr OnsiteFull Time
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
2mo
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Senior Engineer (Engineer III) / Principal Engineer (Engineer IV) – Propulsion
Rockville, Maryland, United States
$160k-$200k/yr OnsiteFull Time
7+ YOESenior or Principal propulsion engineer with 7-10+ years, leadership of engineering teams, strong project management, and aerospace/system design expertise.
1w
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Principal Product Engineer - Evinova
Gaithersburg, Maryland, United States
$172k-$259k/yr HybridFull Time
8+ YOE8+ years software engineering experience with principal-level ownership, production AI feature experience (agents,RAG,model orchestration), strong full‑stack and AWS experience, mentoring ability, and a bachelor's degree.
AWS, EKS, React, TypeScript, Vite, Tailwind, shadcn/ui, BlockNote, Nginx, Node.js, Next.js, Python, Kafka, FastAPI, Dramatiq, Valkey, PynamoDB, SQLAlchemy, asyncpg, Prometheus, MongoDB, Docker, Kubernetes, AWS CDK, ECS Fargate, DynamoDB, S3, RDS, ElastiCache, Bedrock, Secrets Manager, SSM, NX, pnpm, GitHub Actions, GHCR, Docker/Buildx, Wiz, GitHub OIDC, Google ADK, LiteLLM, OpenRouter, Langfuse, OpenTelemetry, RAGAS, Claude Code, Cursor, Copilot, opencode, Hermes Agent, MCP
2mo
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Principal Computational Engineer, 3D CAD & Geometric Intelligence
North Bethesda or Waltham
$200k-$230k/yr HybridFull Time
12+ YOELead architecture for 3D geometry platform; expert in computational geometry, CAD formats, C++/Python; senior IC capable of delivering production-ready systems.
C++, Python, Parasolid, ACIS, Open CASCADE, NX Open, Teamcenter, Solid Edge API, DesignCenter, DXF, STEP, IGES, JT, Parasolid XT, HOOPS Exchange, PRC
1mo
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Principal Test Engineer
Germantown, Maryland, United States
$120k-$162k/yr OnsiteFull Time
8+ YOEBachelor's in engineering plus minimum 8 years' experience, mastery of multiple engineering disciplines, ability to obtain/hold DOD security clearance, strong technical leadership and test development skills.
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Principal Engineer - Mechanical
Reston, Virginia, United States
$160k-$231k/yr HybridFull Time
13+ YOEBachelor's in Mechanical Engineering, 13+ years engineering experience with 10+ years on combined cycle power plants; ability to develop P&IDs, perform sizing calculations, and apply ASME/HEI/CTI/HI codes.
2mo
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Principal Cybersecurity Engineer
Reston, Virginia, United States
$185k-$277k/yr HybridFull Time
9+ YOE9+ years in building GRC platforms; proficient in Python/Go/Java; strong SDLC governance; architecture, data models, API design; leads technical roadmaps; experience automating risk data.
Python, Go, Java, Git, APIs, ETL, Data Modeling, NIST, FAIR
4w
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Principal Software Developer Engineer
Reston or Austin or Seattle
$115k-$235k/yr OnsiteFull Time
6+ YOEU.S. citizenship and active TS/SCI with Poly required. Senior software engineer with multi-year experience designing, building, testing, and operating distributed application services; experience with databases, programming/scripting, secure development, code review, and mentorship.
Oracle Cloud Infrastructure, AWS, Azure, Google Cloud, RESTful APIs, microservices, CI/CD, containers, Kubernetes, Linux, observability
4w
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Principal Innovation Engineer
Reston, Virginia, United States
$177k-$332k/yr OnsiteFull Time
10+ YOE10+ years in systems/software/platform engineering with experience prototyping emerging technologies, cloud/edge deployments, biometrics/peripherals, networking, resilience, and presenting technical recommendations.
AWS, Terraform, Java, MongoDB, Elasticsearch/OpenSearch, RabbitMQ, Kafka, Grafana, ELK, HashiCorp Consul, Nomad, Vault
1mo
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Principal Engineer – Connector Reliability
Yocumtown, Pennsylvania, United States
OnsiteFull Time
8+ YOEPh.D. preferred (master's acceptable with experience). 8+ years engineering experience, 5+ years reliability engineering, DFMEA and ALT/HALT experience, familiarity with standards and statistical reliability tools.
Weibull++, ReliaSoft, Minitab, SEM, DFMEA, MIL-HDBK-217F, Telcordia SR-332, IEC TR 62380, FIDES, IEC 60512, USCAR-2, AEC-Q200, MIL-STD, ALT, HALT, HAST
2w
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Principal Test Engineer
Columbia, Maryland, United States
$176k-$182k/yr OnsiteFull Time
8+ YOE8+ years test engineering experience, bachelor\u0002s in STEM or equivalent experience, TS/SCI with Full Scope Polygraph, experience developing T&E plans and leading test teams.
2w
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Principal AI Engineer
Columbia, Maryland, United States
$144k-$200k/yr RemoteFull Time
10+ YOEBachelor's degree and 10+ years software engineering; experience building agentic AI, MCP integrations, LLM workflows, cloud deployments, Python, EMR/CI/CD knowledge, and ability to obtain public trust clearance.
Model Context Protocol (MCP), LLM, Python, Azure, AWS, Google Cloud Platform (GCP), Databricks, Snowflake, Spark, Strands Agents, LangGraph, CrewAI
20h
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Principal Design Engineer
Chantilly or Herndon
$220k-$292k/yr OnsiteFull Time
20+ YOERequires 20+ years of mechanical and mechanism design, 10+ years designing spacecraft systems, 3-D CAD, prototyping, testing, leadership, and an engineering BS, MS, PhD, or equivalent experience. U.S. citizenship and Top Secret eligibility required.
3-D CAD, Oscilloscopes, power supplies, electronic loads, multimeters
1mo
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Principal Space Engineer
Reston, Virginia, United States
HybridFull Time
10+ YOE10+ years satellite network design experience, bachelor’s in electrical engineering or related, expert-level technical skills, prior US military/NATO/Federal contracts experience, ability to obtain DoD Secret clearance, U.S. citizenship required.
iDirect Evolution, iDirect Velocity, DVB-S2/S2X, TDMA, MF-TDMA, ATDMA, SCPC, Adaptive Coding and Modulation (ACM), QoS, CIR/MIR, VSAT, electronically steered antennas (ESA), COTM
1mo
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Principal Hardware Engineer
Ashburn or Boston or Salem
$144k-$190k/yr OnsiteFull Time
15+ YOEBachelor's in Electrical Engineering, 15+ years DoD embedded systems/hardware design experience (SBC, FPGA, switch, I/O, VPX), experience with HDI PCB design and Siemens Expedition tools, strong leadership, US citizenship required, DoD clearance preferred.
Siemens Expedition DX Designer, Siemens Expedition PCB, Microsoft Excel, Microsoft Outlook, Microsoft PowerPoint
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