Senior Mechanical Engineer

Senior Mechanical EngineerTwin Cities, Minnesota, United States, HybridWhat We Do at Anno.aiAnno.ai is a mission-focused defense technology startup dedicated to accelerating the safe and effective development of next-generation autonomous systems. We specialize in building and operating advanced test ranges for low Technology Readiness Level (TRL) single- or dual- use autonomous platforms, providing a critical bridge between early-stage innovation and real-world mission requirements.Our ranges are designed to replicate complex, contested, and dynamic environments—giving innovators, researchers, and defense partners the ability to validate, stress-test, and mature their systems with speed and rigor. By combining deep technical expertise with a strong national security ethos, Anno.ai ensures that emerging autonomous technologies are tested not only for performance, but for resilience, adaptability, and operational relevance.Anno.ai is a growing company with a team drawn from diverse professional backgrounds, bringing together expertise in defense, technology, engineering, and operations. We intentionally build our teams on the foundation of trust. Our values including the trust rule, ownership, bias for action, never stop learning, and sustainable excellence, not only guide how we work internally, but also how we partner with customers and stakeholders.At Anno.ai, we believe that mission success depends on empowering innovation at the edge. We exist to help our partners move faster, fail smarter, and ultimately deliver autonomous capabilities that safeguard both national security and the future of global stability.Position OverviewAs a Senior Mechanical Engineer at Anno.Ai, you will design, develop, prototype, document, test, and support manufacturing of systems used in field-deployable autonomous, sensor, and mission-support platforms. You will create 3D models, mechanical drawings, schematics, fixtures, mounts, enclosures, and components that enable rugged, reliable operation in demanding field environments.You will work directly with product, manufacturing, and field operations teams to develop designs that support integrated systems and components. This role requires a hands-on engineer who can move quickly from concept to CAD to prototype to manufacturable hardware while balancing performance, durability, weight, cost, serviceability, and operational constraints.The ideal candidate for this role would reside in Minnesota.Candidates need to be able to obtain and maintain U.S. Government security clearance (U.S. citizenship required). Candidates must be able to travel up to 20% of the time.What You Will DoDesign rugged mechanical systems, enclosures, mounts, fixtures, and sensor housingsSupport products and related test range systemsCreate 3D CAD models, drawings, assemblies, and BOM inputsPrototype, fabricate, assemble, and iterate on field-deployable hardwareDesign for weather resistance, vibration, shock, corrosion, and thermal performanceDevelop mechanical interfaces for sensors, electronics, cabling, and other infrastructureSupport manufacturing, design reviews, fit checks, and documentation updatesTroubleshoot hardware issues during prototype builds and field testing, and field supportCollaborate with other cross-functional teamsRequired QualificationsBachelor's degree in Mechanical Engineering, Aerospace Engineering, or a related technical field5+ years of professional experience designing mechanical systems, enclosures, mounts, fixtures, rugged hardware, sensor payloads, or field-deployable equipmentStrong proficiency with 3D CAD tools such as SolidWorks, Autodesk Fusion, or similar software, including production-quality mechanical drawing practicesExperience with tolerance stack-ups, GD&T, revision control, design reviews, and manufacturable documentationExperience designing serviceable components for field-deployable hardwareExperience supporting additive manufacturing, rapid prototyping, prototype fabrication, and design iteration from early concepts through functional test articlesExperience supporting manufacturing processes such as CNC machining, sheet metal fabrication, additive manufacturing, composites, injection molding, casting, or low-rate production buildsExperience with environmental design considerations including sealing, water resistance, corrosion resistance, vibration, shock, thermal management, UV exposure, and weatherizationAbility to read and interpret technical documentation, schematics, layout files, BOMs, technical orders, and mechanical drawingsAbility to obtain and maintain U.S. Government security clearance (U.S. citizenship required)Ability to travel up to 20%Preferred QualificationsPrior experience supporting UAS/cUAS systems, defense or aerospace industryExperience designing for extreme environmentsExperience with maritime, coastal, buoy-mounted, vehicle-mounted, or other outdoor systems exposed to moisture, salt air, pressure, wind, temperature variation, and long-duration field operationExperience with MIL-STD-style environmental hardening, ruggedization, shock/vibration design, ingress protection, corrosion control, or field qualification testingExperience with additive manufacturingTotal Rewards Package for Our US EmployeesCompetitive salaryEquityComprehensive benefits package401k with a 5% company matchPaid holidays and generous paid time off offeringPaid leave programsPatent bonus programEmployee referral bonus programLearning and development programOpportunity to work with a team of highly skilled, creative and motivated team membersQuick Note on Role FitIf you think you have what it takes to fulfill this opportunity, but don't necessarily check every box, please still connect with us at View email address on click.appcast.io. Feel free to send a cover letter so we can get to know you better!