Principal Mechanical Engineer (Engineer Mechanical 5) - 29786

Requisition Number: 29786 Required Travel: 0 - 10% Employment Type: Full Time/Salaried/Exempt Anticipated Salary Range: $143,140.00 - $235,000.00 Security Clearance: Secret Level of Experience: Senior This opportunity resides with Warfare Systems (WS) , a business group within HII’s Mission Technologies division. Warfare Systems comprises cyber and mission IT; electronic warfare; and C5ISR systems. HII works within our nation’s intelligence and cyber operations communities to defend our interests in cyberspace and anticipate emerging threats. Our capabilities in cybersecurity, network architecture, reverse engineering, software and hardware development uniquely enable us to support sensitive missions for the U.S. military and federal agency partners. Meet HII’s Mission Technologies Division Our team of more than 7,000 professionals worldwide delivers all-domain expertise and advanced technologies in service of mission partners across the globe. Mission Technologies is leading the next evolution of national defense – the data evolution - by accelerating a breadth of national security solutions for government and commercial customers. Our capabilities range from C5ISR, AI and Big Data, cyber operations and synthetic training environments to fleet sustainment, environmental remediation and the largest family of unmanned underwater vehicles in every class. Find the role that’s right for you. Job Description Mission Technologies, a division of HII, is expanding - and we're looking for bold, inventive Prinicipal Mechanical Engineers to join our fast-moving, interdisciplinary teams in our Alexandria, VA. At Mission Technologies, we design and build customized, mission–enabling solutions for the defense and intelligence communities—solutions that fuse cutting‑edge technology with real‑world tradecraft. Our teams are filled with imaginative builders, hands‑on problem solvers, and curious minds from a wide range of backgrounds. Here, collaboration isn’t just a value—it’s the way the work gets done. You’ll be part of small, high‑trust teams that turn ideas into functional hardware at remarkable speed. If you love tackling open‑ended problems, experimenting with new technologies, and seeing your designs come to life in the field, this is the place for you. Bring your mechanical engineering expertise—and shape the role based on your strengths, interests, and creativity. You’ll work on rapid‑turn projects that go from concept to deployment, contributing to hardware used by end‑users around the world. Your Impact Will Include Hands-On Design & Prototyping: Apply your mechanical engineer fundamentals to a diverse, mission-critical projects. This includes developing solutions like electromechanical devices, motion platforms, electronics packaging, and multi-spectral signature management (visible, NIR, thermal, acoustic, RF). DFM Focus: Leverage your understanding of Design for Manufacturing (DFM) to ensure your designs are optimized for both subtractive and additive manufacturing methods. Cross-Functional Collaboration: Work shoulder-to-shoulder with senior engineers, technicians, managers, and end-user clients in small, close-knit teams. Clear communication and adaptability are key as you iterate quickly within small, agile teams. System Integration: Use your awareness of electrical systems to ensure all mechanical designs integrate seamlessly into complete products. Joining HII means joining a team with decades of proven impact: Impactful Work: Earn a sense of accomplishment by making meaningful contributions to our nation’s top security priorities. Rapid Prototyping: Access to some of the most comprehensive secure rapid prototyping facilities in the mid-Atlantic region, including a full in-house machine shop, composite fabrication, finishing, electronics assembly, and testing capabilities. Essential Job Responsibilities Provide support to the design, development, prototype fabrication, and verification testing of unique specialty products Perform detailed system and sub-system analysis, simulation, and design work as required Work with complicated mechanical system concepts and detailed designs to properly determine the necessary design tradeoffs Interface with project teams and external customers as required, to support specialized product development Participate in the assembly, system test planning, and system test procedure generation Adequately document processes, procedures, and testing using structured formats. Where formats do not currently exists, provide a recommended format for review Learn and utilize the Quality Management System (QMS) and existing tools and templates Interface with project teams and external customers as required, to support specialized product development Minimum Qualifications Level 5: 15 years relevant experience with Bachelors in related field; 13 years relevant experience with Masters in related field; or 10 years relevant experience with PhD or Juris Doctorate in related field. Clearance Requirement Active US Secret clearance required, with ability to obtain TS/SCI. Technical Requirements Experience with mechanical CAD tools. Proven mechanical design experience (mechanisims, power trains, thermal management, structures, embedded electronics). Experience with various manufacturing methods (additive, machining, sheet metal, PCBAs, cable harnesses, composites). Hands-on assembly experience. Strong documentation skills (2D engineering drawings, PowerPoint, Visio, Adobe suite). Creativity and comfort with open-ended, precedent-free problem solving. Preferred Requirements Advanced fabrication experience (welding, composite layups, machining, industrial finishes and paints). Simple embedded electronics work (Jetson, Arduino, RPi) and associated Python or C++ programming skills. Experience using computational fluid dynamics (CFD and/or FEA for stress, deformation, and modal analysis). Working knowledge of RF systems (signal analyzers, SDRs, antennas, amplifiers). Experience with project management (Earned value mgmt, estimating, requirements capture). An active TS/SCI clearance Physical Requirements May require working in an office, industrial, shipboard, or laboratory environment. Capable of climbing ladders and tolerating confined spaces and extreme temperature variances. HII is more than a job - it’s an opportunity to build a new future. We offer competitive benefits such as best-in-class medical, dental and vision plan choices; wellness resources; employee assistance programs; Savings Plan Options (401(k)); financial planning tools, life insurance; employee discounts; paid holidays and paid time off; tuition reimbursement; as well as early childhood and post-secondary education scholarships. Bonus/other non-recurrent compensation is occasionally offered for qualified positions, and if applicable to this role will be addressed by the recruiter at the screening phase of application. Why HII We build the world’s most powerful, survivable naval ships and defense technology solutions that safeguard our seas, sky, land, space and cyber. Our workforce includes skilled tradespeople; artificial intelligence, machine learning (AI/ML) experts; engineers; technologists; scientists; logistics experts; and business administration professionals. Recognized as one of America’s top large company employers, we are a values and ethics driven organization that puts people’s safety and well-being first. Regardless of your role or where you serve, at HII, you’ll find a supportive and welcoming environment, competitive benefits, and valuable educational and training programs for continual career growth at every stage of your career. Together we are working to ensure a future where everyone can be free and thrive. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, physical or mental disability, age, or veteran status or any other basis protected by federal, state, or local law. Do You Need Assistance? If you need a reasonable accommodation for any part of the employment process, please send an e-mail to View email address on click.appcast.io and let us know the nature of your request and your contact information. Reasonable accommodations are considered on a case‑by‑case basis. Please note that only those inquiries concerning a request for reasonable accommodation will be responded to from this email address. Additionally, you may also call View phone number on click.appcast.io for assistance. Press #3 for HII Mission Technologies. #J-18808-Ljbffr Mission Technologies, a division of HII