Radia is seeking a Senior Aircraft Fluid Systems Engineer to help define, model, analyze, and integrate critical fluid systems for WindRunner™, including Hydraulic Power Systems, Air Management Systems, and Environmental Control Systems (ECS). In this role, you will work across system architecture, performance analysis, modeling and simulation, supplier collaboration, and certification-ready design to deliver robust aerospace systems for a first-of-its-kind aircraft. This is an opportunity for an experienced systems engineer who thrives in fast-moving environments, enjoys solving complex multidisciplinary problems, and can independently drive technical work from concept through execution. **Responsibilities** - Develop, validate, and maintain system-level models for environmental control and hydraulic power systems using Simulink, MATLAB, Python, among other tools. - Perform analyses related to thermal management, airflow, pressure control, fluid dynamics, and system integration. - Support system architecture definition, requirements development, and verification planning. - Interpret and apply FAA Part 25 regulations to ensure compliance throughout design and development. - Lead technical interactions with suppliers, including reviewing designs, managing deliverables, and ensuring alignment with program requirements. - Collaborate with cross-functional engineering teams to support aircraft-level integration and trade studies, including providing 3D layouts of equipment in CATIA. - Prepare clear technical documentation, analysis reports, and presentations for internal and external stakeholders. **Requirements** **Required Qualifications** - Bachelor's or Master's degree in Aerospace Engineering, Mechanical Engineering, or a related field. - 8+ years of relevant experience in aircraft systems engineering, fluid systems, environmental control systems, hydraulics, thermal systems, or related aerospace systems. - Strong experience with Simulink, MATLAB, and Python for modeling, simulation, and data analysis. - Solid understanding of environmental control systems, hydraulic systems, or related aircraft subsystems. - Ability to work independently, set priorities, and drive tasks to completion with minimal oversight. - Excellent communication skills and a collaborative mindset. **Preferred Qualifications** - Familiarity with FAA Part 25 certification requirements and aircraft development processes. - Experience managing suppliers or external partners, including technical reviews and schedule oversight. - Experience supporting aircraft-level integration, system layouts, or equipment placement using CATIA or similar 3D design tools. **Work Environment** - This position is anticipated to be based primarily onsite at Radia's facility in Boulder, CO to facilitate close collaboration with engineering teams, program leadership, and certification personnel. **Benefits** - Comprehensive medical, dental, and vision coverage, plus mental health support with 24/7 counseling, virtual therapy, and the Calm app. - Employer-paid life and disability insurance, voluntary critical illness and accident coverage, and a 401(k)-retirement savings plan. - Health Care FSA and HSA options with tax advantages and rollover features. - Employees working from Radia's Boulder office enjoy complimentary lunch on any day they work onsite. - Additional benefits include Employee Assistance Program, caregiver support, discounted fitness memberships, educational assistance, training programs, adoption assistance, commuter benefits, and exclusive discounts through Perks at Work.