Principal Software Engineer- Flight Systems FS StudioPrincipal Software Engineer- Flight SystemsDenver, ColoradoA fast-growing space-technology company is seeking a Principal Software Engineer to lead architecture and development of ground and flight software for lunar and deep-space missions. Develop flight software (cFS, embedded Linux), ground systems (Python, modern web frameworks), and cloud/embedded ML or autonomy systems.
Principal Design Engineer CrusoePrincipal Design EngineerDenver, ColoradoWe're looking for problem-solving, opportunity-finding teammates with a sense of urgency, who believe in the scale of our ambition and thrive on a path not fully paved — people who want to grow their careers alongside a team of experts across energy, manufacturing, data center construction, and cloud services. Liquid Cooling Transition: Lead systems-level engineering for the shift from air-cooled units to DLC/CDU architectures, managing integration impacts on power density and structural loads.
Principal AI/ML Engineer (Large Language Model) (TS/SCI) {S} ARKA Group, L.P.Principal AI/ML Engineer (Large Language Model) (TS/SCI) {S}Aurora, ColoradoExperience leading an interdisciplinary team of researchers and software developers and working with a program manager to define project scope and schedule to ensure we meet project milestones as defined by our customers. Being situated at the foot of the Rocky Mountains, Aurora provides opportunities to enjoy all the beautiful nature that Colorado has to offer, while also being a 20-minute drive from downtown Denver and 15-minutes to the Denver International Airport.
Principal Software Engineer (TS/SCI) {S} ARKA Group, L.P.Principal Software Engineer (TS/SCI) {S}Aurora, ColoradoBeyond direct design, the architect is expected to drive technical consensus through trade studies, proactively identify and mitigate technical risks, act as the primary technical interface to leadership, government customers, and sub-contractor CA/CE’s, and actively participate in the mentorship and growth of the distributed engineering team, ultimately joining our team to help shape the development and delivery of custom solutions and providing significant opportunities for personal skill development at ARKA. ARKA is seeking an accomplished Software Architect/Principal Software Engineer who is deeply customer mission-focused and passionate about providing strategic technical leadership in the software architecture and design of complex government systems, requiring proven experience leading programs involving 30+ developers in a distributed environment.
Principal AI Engineer Workday IncPrincipal AI EngineerBoulder, CO$217,000–$325,000 / year10+ years of professional software engineering experience with deep expertise in distributed systems, cloud computing, and API design, plus 2+ years of dedicated focus building production-grade LLM/agentic systems OR 7+ years of experience specifically within Machine Learning Engineering or AI application development, with 3+ years dedicated to shipping LLM-backed products. 6+ years of experience optimizing application performance (specifically tackling constraints like API latency and user interaction design), with 2+ years applied to modern LLM constraints (such as token management, cost optimization, and context-window efficiency).
Principal Consultant, Land Services - Denver, Colorado ERMPrincipal Consultant, Land Services - Denver, ColoradoDenver, Colorado$100,670–$152,062 / yearAs the largest global pure play sustainability consultancy, we partner with the world’s leading organizations, creating innovative solutions to sustainability challenges and unlocking commercial opportunities that meet the needs of today while preserving opportunity for future generations. Our diverse team of world-class experts supports clients across the breadth of their organizations to operationalize sustainability, underpinned by our deep technical expertise in addressing their environmental, health, safety, risk and social issues.
Education And Science Principal HDR, Inc.Education And Science PrincipalDenver, COWe are consistently ranked #1 in Science and have been recognized by the industry's Lab of the Year program 11 times for designing facilities in which world-class scientists can discover cures for insidious diseases, create new sources of clean energy, protect our resources and improve public health-enriching people's lives around the world. In collaboration with subject matter experts, and independently when appropriate, developing abstracts and presentations for industry conferences, seminars, workshops, and other similar events promoting program messages, research, project outcomes, lessons learned, trends, etc.
Principal Manufacturing Development Engineer Xcimer EnergyPrincipal Manufacturing Development EngineerDenver, COSupplier and Integrator Management: Work with procurement and external vendors to develop RFQs, define technical specifications, manage build and installation phases, and lead factory and site acceptance testing for robots, cobots, palletizers, and other actuated parts of the production line. Manufacturing Process Optimization: Evaluate and improve automated manufacturing workflows by analyzing cycle times, material flow, automation ROI, and work-in-process buffering to support consistent production output.
Principal Network Software Engineer - TS/SCI Rocket Lab USAPrincipal Network Software Engineer - TS/SCILittleton, Colorado$170,000–$220,000 / yearFull timeOur Space Systems team builds everything from complete spacecraft, precision payloads to the components and subsystems that allow them to thrive in space, like solar panels, flight software, star trackers, optical systems, separation systems, radios, and more. This role will work with a team of engineers on Rocket Lab's flagship efforts to deliver on program milestones related to Space-to-Space Communications, Space-to-Ground Communications, Payload Software, and Data Security.
Principal Controls Engineer Atlas OTPrincipal Controls EngineerCentennial, ColoradoAs a Principal Controls Engineer at Atlas OT, you will set the technical direction for integrated automation and controls solutions across a wide range of industries, including energy, manufacturing, food and beverage, water/wastewater, oil and gas, renewables, and more. Bachelor’s degree in Engineering required; advanced credentials preferred (Master’s degree, ISA CAP, PE License – Control Systems, or recognized industry Fellow status).
Healthcare Engineering Principal HDR, Inc.Healthcare Engineering PrincipalDenver, COOur eight Employee Network Groups (Asian Pacific, Black, Hispanic/Latino(a), LGBTQ, People with Disabilities, Veterans, Women, Young Professionals) help create a sense of belonging and foster a supportive environment where everyone is empowered to engage and contribute. Work closely with local office leadership and Central Region leadership to ensure that the health engineering practice is meeting the business objectives for the firm from a local and regional perspective.
Senior Principal Consultant, Transactional Due Diligence SLR ConsultingSenior Principal Consultant, Transactional Due DiligenceDenver, COactive clients and expertise in client management, internal staff management, and the management of multiple project efforts and project teams; including coordination with staff resources, clients, subcontractors, and regulatory agencies. In the Americas, the Strategic Advisory Team is comprised of over 250 professionals across the Finance, Energy, Mining, and Corporate Sustainability practices, and is now looking for a Senior Principal Consultant to help manage and grow the Finance Advisory - Transactional Due Diligence practice.
Client Security Principal (Req#1263) ePlus TechnologyClient Security Principal (Req#1263)Denver, CO$170,000–$190,000 / yearLeverage previous success and experience in the areas of Network Security, Advanced Threats, Security Operations and Analytics, Data and Application Security, Endpoint Security, Cloud Security, Integrated Security Architectures, Complex Professional Services Engagements, and Advisory & Managed Services to provide thought leadership for clients, partners, and internal ePlus teams. The essential functions of this position include: Partner with the regional vice president (RVP) and services leadership to have joint responsibility for the regional security business, driving high performance around achieving the financial security goals/budget, building and executing a business plan, and facilitating a regular security forecasting cadence within the assigned territory.
Principal Adaptive Optics Engineer Xcimer EnergyPrincipal Adaptive Optics EngineerDenver, CO$190,000–$220,000 / yearDemonstrated hands on experience working with laser beams, including propagation, beam quality, wavefront control, and interaction with real optical hardware. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members.
Engineering Principal HDR, Inc.Engineering PrincipalDenver, COOur building engineering team is a full-service, multi-disciplinary organization including structural, site civil, mechanical, electrical, control systems engineers and specialty design services that is co-located with our Architecture studio to support a collaborative and fully-integrated design process. Our eight Employee Network Groups (Asian Pacific, Black, Hispanic/Latino(a), LGBTQ, People with Disabilities, Veterans, Women, Young Professionals) help create a sense of belonging and foster a supportive environment where everyone is empowered to engage and contribute.
Principal Radio Systems Engineer LeoLabsPrincipal Radio Systems EngineerDenver, ColoradoThis is a hands-on technical leadership role for an experienced engineer who enjoys solving difficult problems, mentoring other engineers, working in dynamic teams, interfacing with external partners and customers, and building reliable hardware that performs in demanding environments. As orbital activity accelerates and threats grow more complex, LeoLabs is a trusted partner for Space Domain Awareness, Space Traffic Management, and Satellite Operations for top-tier space operators and allied defense organizations.
Director, Principal Gifts ChangentDirector, Principal GiftsDenver, CORemote$139,000–$156,000The Director leads major gift fundraising across Changent by setting the fundraising strategy, developing a high-performing team, and building lasting relationships with donors who invest in our mission. This role connects donor interests with Changent priorities, creates meaningful opportunities for philanthropic investment, and grows the support needed to expand our reach and deepen our impact.
Principal Systems Engineer Xcimer EnergyPrincipal Systems EngineerDenver, CO$201,450–$237,000 / yearDevelop strategies, approaches for specialty engineering (operability, reliability, maintainability, supportability) integration, analysis and verification. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information.
Principal Bess Engineer Clearway Energy, Inc.Principal Bess EngineerDenver, CO$140,000–$195,000 / yearManager of BESS Engineering, the Principal Battery Energy Storage System (BESS) Engineer (or Battery Energy Storage System Manager) is responsible for preliminary engineering, fire safety engineering, technical specifications, system optimization, and procurement support for stand-alone, hybrid, and co-located BESS facilities. The Principal BESS Engineer / BESS Engineering Manager will work with project teams, external engineering teams, vendors, third parties, and consultants to drive our class-leading, multi-gigawatt, and globally competitive project pipeline to fruition.
Principal Analyst: Strategic Sourcing Analytics & Advancement Vail ResortsPrincipal Analyst: Strategic Sourcing Analytics & AdvancementBroomfield, CO$100,000–$135,000 / yearThis role will lead implementation of a new spend analytics platform and AI-enabled competitive bid sourcing tool, own Procurement savings reporting and Finance alignment, and deliver inflation, market, and supplier insights that inform sourcing strategy and executive decision making. Reporting to the Senior Director of Procurement, the Principal Analyst: Strategic Sourcing Analytics & Advancement will transform Procurement’s spend analytics, technology, and reporting capabilities to drive stronger category-level decisions, enterprise value creation, and global spend visibility.