453 principal engineer jobs at 128 companies in Frederick, CO
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Principal Mechanical Engineer
Broomfield, Colorado, United States
$167k-$230k/yr OnsiteFull Time
12+ YOEBachelor's degree in Mechanical Engineering or related field; 12+ years mechanical engineering experience; strong design, analysis, and leadership skills; proficient with NX, SolidWorks, ANSYS; able to mentor engineers.
NX, SolidWorks, ANSYS
1mo
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Principal Environmental Engineer
San Diego or Concord or Knoxville or Denver or Norfolk or Canton
$175k-$225k/yr RemoteFull Time
15+ YOEMaster's in Environmental Engineering, PE license, 15+ years environmental engineering experience (DoD/CERCLA), leadership experience on federal remediation projects, ability to travel, strong verbal and written communication.
3mo
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Principal Network Engineer
Denver, Colorado, United States
$160k-$180k/yr OnsiteFull Time
15+ YOE15+ years network engineering; 5+ years in service provider functions; routing/switching expertise; security tools experience; minimal travel; leads technical actions.
Cisco, Juniper, BGP, OSPF, EIGRP, Cisco ISE, Palo Alto
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Principal Engineer, Firmware
Longmont, Colorado, United States
$161k-$275k/yr OnsiteFull Time
7+ YOELead firmware architecture for SSDs; 7+ years embedded firmware; C/C++, Python; ASIC/FPGA bring-up; strong communication.
C, C++, Python
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Principal/Sr. Principal Electromechanical Engineer
Aurora, Colorado, United States
$114k-$213k/yr OnsiteFull Time
5+ YOEPrincipal: 5+ years STEM experience or 3+ with master's; Sr. Principal: 8+ years or 6+ with master's; TS/SCI clearance; hardware design and integration experience.
Hardware Design, RF, Fiber Optics, Power, System Integration
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Principal/Sr. Principal Electromechanical Engineer
Aurora, Colorado, United States
$114k-$213k/yr OnsiteFull Time
5+ YOETS/SCI clearance required; Bachelor's or Master's in STEM with 5+ (Principal) or 8+ (Sr Principal) years experience; hardware design/integration experience; knowledge of power, RF, and fiber; EM field support and travel experience.
2w
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Associate Principal Engineer - Civil Engineering (Renewable Civil )
Lakewood, Colorado, United States
$100k-$175k/yr HybridFull Time
7+ YOEBachelor's in Civil Engineering, PE licensure, 7+ years engineering/field experience, proficiency with AutoCAD, MathCAD, SAP2000, PLS-CADD, AutoCAD Civil 3D and Microsoft Office; strong communication and leadership.
AutoCAD, MathCAD, SAP2000, PLS-CADD, AutoCAD Civil 3D, Microsoft Office Suite
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Principal Project Engineer
Boulder, Colorado, United States
$135k-$168k/yr OnsiteFull Time
10+ YOELeads capital projects in pharma, manages cost, scope and schedule, and coordinates multi-disciplinary teams.
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Principal RF Engineer
Boulder, Colorado, United States
$180k-$220k/yr HybridFull Time
Atom Computing: Building scalable quantum computers using arrays of neutral atoms.
10+ YOEDesign, verify, and test RF hardware and systems for quantum control; lead RF packaging; collaborate across teams; 10+ years in electronics/RF.
Python, Keysight ADS, Vector Network Analyzer, Spectrum Analyzer, Oscilloscope, Signal Generator, Power Meter
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Principal Systems Engineer
Aurora, Colorado, United States
$108k-$205k/yr OnsiteFull Time
8+ YOEBachelor's in STEM and 8+ years' experience; proficiency in C/C++, Python or MATLAB; modeling & simulation experience; active transferable DoD Secret clearance and U.S. citizenship required.
C, C++, Python, MATLAB, UNIX, Linux, Git
1w
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Principal Engineer - Packaging Equipment
Omaha or Chicago or Denver
$109k-$159k/yr RemoteFull Time
7+ YOEBachelor's in Mechanical/Robotics/Packaging Engineering,7+ years food manufacturing packaging design,automation and project engineering experience,USDA/FDA-regulated environment experience,team leadership,automation/robotics expertise.
2d
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Principal Product Engineer- Machine Design
Lafayette, Colorado, United States
$124k-$186k/yr OnsiteFull Time
7+ YOEBaccalaureate degree with 7+ years (or MS with 5+, PhD with 3+) and significant machine design experience; advanced SolidWorks proficiency; engineering documentation and validation experience in regulated environments.
SolidWorks, PDM/PLM, FEA
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Principal Mission Assurance Engineer
Westminster, Colorado, United States
$136k-$167k/yr OnsiteFull Time
8+ YOEBachelor's in engineering; 8+ years aerospace/DoD; mission assurance expertise; AS9100 experience preferred; strong communication and collaboration skills.
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Principal Engineer
Denver, Colorado, United States
$180k-$200k/yr HybridFull Time
10+ YOE10+ years in technical leadership; BA/BS in Computer Science; Ruby/Rails, TypeScript/React, Go, Python; AI-native workflow experience; agentic apps; scaling complex products.
Ruby, Rails, TypeScript, React, Go, Python, AI tooling
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Principal / Sr Principal Algorithms Software Engineer
Boulder, Colorado, United States
$155k-$180k/yr OnsiteFull Time
5+ YOEActive in-scope U.S. Government Secret clearance required, ability to obtain TS/SCI, 5+ years relevant experience for principal roles (8+ for Sr Principal), Python and C++ development, Linux and command-line utilities, algorithm and state estimation experience, strong statistics and analysis skills, willingness to travel up to 10%.
Python, C++, Linux, grep, awk, cat, head
2mo
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Principal Analytics Engineer
United States or Denver
$165k-$240k/yr RemoteFull Time
12+ YOE12+ years in analytics engineering or data engineering with analytics partnership; expert SQL and Python; data governance tooling; cross-functional leadership.
SQL, Python, dbt, Snowflake, data governance tooling
1mo
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Senior Principal Engineer – Embedded Software
Broomfield or Westminster or Boulder
$133k-$226k/yr OnsiteFull Time
8+ YOEBS in engineering or related field + 8+ years experience; U.S. person required and must be willing/eligible to obtain Top Secret/SCI; experience with embedded Linux, C/C++, Rust, Python, CI/CD, and embedded software lifecycle.
CI/CD, Containerization, C/C++, Rust, Python, Ruby, Embedded Linux, FPGAs, MQTT, ZeroMQ, PetaLinux, Yocto, Device tree, UML, Protobuf, FlatBuffers, MATLAB, Cameo, PlantUML, DevSecOps, Yocto Project, OpenEmbedded, gtest, ctest, hardware-in-the-loop
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Software Engineer Principal
Dallas or Strongsville or Phoenix or Denver or Pittsburgh
$65k-$166k/yr OnsiteFull Time
5+ YOELead enterprise platform engineering; strong Linux/Windows, PowerShell and Python; drift management; mentor team.
Linux, Windows Server, PowerShell, Python, Elastic, Dynatrace, AWS, Azure
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Principal Software Engineer
Denver, Colorado, United States
$190k-$245k/yr OnsiteFull Time
10+ YOEExpert-level C++ development; architect large-scale cross-platform systems; lead engineering initiatives; strong communication.
C++, Qt, REST, JSON, QML, QtWidgets, Git, CMake, QMake
2w
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Engineer Senior Principal II - Launch Systems - $10K Sign-On Bonus
Broomfield or Boulder
$150k-$254k/yr OnsiteFull Time
10+ YOEBS in engineering plus 10+ years experience (or advanced degree substitution), ability to obtain/maintain Top Secret/SCI polygraph, launch and mission systems integration experience, technical leadership, MBSE/JIRA/Linux familiarity.
MBSE, Linux, JIRA, EVM, CAM
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