Turbomachinery Engineer

Heartaerospace

At Heart Aerospace we develop the ES-30, a regional hybrid-electric airplane with a capacity of 30 passengers, an electric zero-emission range of 200 km and an extended hybrid range of 400 km. Heart is targeting type certification of the ES-30 by the end of the decade. Your mission We are seeking a highly motivated Power Electronics Engineer to join our Propulsion team. You will lead the design and integration of the hybrid propulsion, including but not limited to the inverters, motors, HV cables, with batteries, and in parallel with Turbomachinery. You will interface across mechanical, thermal, electrical, and flight control systems to deliver a fully integrated and certifiable hybrid Electric Propulsion Unit (EPU). Key responsibilities include but are not limited to: * This role is a Responsible Engineer (RE) who focuses on the integration of power electronics and high voltage electrical systems into our hybrid aircraft. * Full ownership over design, fabrication, commissioning, and certification of the hybrid propulsion system. * Lead and execute system-level tests, such as motor and propeller test stands. * Collaborate with suppliers to ensure delivery of integrated, certifiable subsystems. * Model the electrical and power electronics systems in to our high fidelity Digital Twin for optimization of our hybrid mission profile. * Perform topology selection trade studies. You'll Bring These Qualifications: * 2+ years of professional experience working with power electronics components. * Strong experience in high voltage power electronics design (+800V) including AC/DC inverters, and DC/DC converters. * Strong understanding of HV filter design, grounding analysis, coordination of protective devices. * Hands-on experience with integration of propulsion and/or powertrain test stands, including instrumentation, controls, and mechanical assembly. * Extensive experience with Altium/cadence/similar), circuit analysis (spice), gate driver design, and lab work (common tools like oscilloscopes, network analyzers) * Experience with C/C++, Python, Matlab/Simulink, or PLECS. * Strong knowledge of Avionics communication, ARINC, CAN, and Ethernet. * Strong understanding of Microcontrollers, Multicore processors, Firmware Development, and digital power conversion. These Qualifications Would Be Nice to Have: * Understanding of certification requirements (EASA CS-23/25 or FAA FAR Part 23/25). * Knowledge of hardware design and airworthiness DO-178C, DO-254, DO-160. * Demonstrated leadership qualities through cross-functional teamwork on challenging problems. * Working knowledge of EMI/EMC, underlying physics and specifications, along with best practices for design, and strategies. * Hands on experience with Matlab/Simulink Auto Code Generation. Education * Master’s or PhD degree in Electrical Engineering with focus on Power Electronics, or Power Systems. Base Pay Range: $124,000—$216,000 USD

Heartaerospace

At Heart Aerospace we develop the ES-30, a regional hybrid-electric airplane with a capacity of 30 passengers, an electric zero-emission range of 200 km and an extended hybrid range of 400 km. Heart is targeting type certification of the ES-30 by the end of the decade. Your mission As a Propulsion Engineer focused on Transmission, you will be essential in designing, developing, and integrating the mechanical power transmission system within our hybrid-electric propulsion framework. Transmission system includes but is not limited to shaft, drive shafts, couplings, gearbox, and disconnect systems. You will collaborate closely with teams from various disciplines, including electric propulsion, turbomachinery, software, and structural engineering, to create robust, lightweight, and high-efficiency transmission solutions. This role demands a high level of technical expertise in mechanical design and a strong understanding of propulsion systems. Key responsibilities include but are not limited to: * This role is a Responsible Engineer (RE) who focuses on the integration of hybrid transmission systems into our hybrid aircraft. * Design and develop gearbox and mechanical power transmission systems for electric and hybrid-electric propulsion. * Perform sizing, strength, thermal, and NVH (noise, vibration, harshness) analyses of transmission components. * Nonlinear static and Dynamic analysis of structures and rotor systems. * Work closely with suppliers and manufacturing partners to guide component development, material selection, and manufacturing processes. * Define requirements, specifications, and interface documents for transmission subsystems. * Lead and support testing and validation efforts including test rig development, instrumentation, and data analysis. * Collaborate with propulsion integration teams to ensure seamless integration into the aircraft. * Support certification and compliance activities in alignment with aviation regulatory bodies (e.g., EASA, FAA). You'll Bring These Qualifications: * 3+ years of experience in mechanical transmission design, preferably in aerospace or automotive sectors. * Aircraft or rotorcraft rotor dynamics and external loads analysis. * Hands-on experience in testing and validation of rotating machinery. * Proficiency in CAD tools (e.g., CATIA, Siemens NX) and CAE tools FEA, Python, Ansys for structural analysis and Github. * Experience with gear design, bearings, lubrication systems, and housing structures These Qualifications Would Be Nice to Have: * Understanding of certification requirements (EASA CS-23/25 or FAA FAR Part 23/25). * Knowledge of aerospace airworthiness standards, e.g. DO-254, and DO-160. * Experience with electric or hybrid propulsion systems. Education * Master’s or PhD degree in in Aerospace Engineering, Mechanical Engineering, or a relevant discipline. Base Pay Range:  $124,000—$155,000 USD

Siemens Energy AB

A Snapshot of Your Day Do you want to help develop the next generation of gas turbines and contribute to a sustainable energy future? As an R&D Mechanical Design Engineer within Combustion, you will be a member of our team, designing and developing components for combustors, burners and fuel manifolds. You will work on advanced designs exposed to extreme temperatures and dynamic loads, where your expertise is essential to ensure robustness, lifetime, and high performance. You take full responsibility for your solution from design to installation by using tools such as the CAD tool NX and Teamcenter. How You Will Make an Impact Develop and optimize mechanical solutions for burners, combustors, and related components. Create concepts, 3D models, and drawings in CAD (NX) and document technical solutions. Choose material and production method for hot components. Participate in development projects from idea to finished product, including design reviews and technical analyses. Act as a technical contact for suppliers and our in-house workshop. Support order design, service, and procurement with technical expertise. Contribute to improving methods, processes, and standards within design. What you bring Master’s degree or equivalent in Mechanical Engineering. Experience and interest in mechanical design, preferably in high-temperature components or turbomachinery. A self-driven problem solver who enjoys collaborating in cross-functional teams and communicates effectively. Responsible, curious, structured, and eager to develop and learn, as well as share knowledge with others. Solid knowledge of 3D CAD (NX is a plus) and understanding of strength calculations. Fluent in English, both spoken and written; Swedish is an advantage. Meritorious Experience with gas turbines, welding, or additive manufacturing. Knowledge of SAP and PLM systems. About the team You will join our Combustion Design team within R&D in Finspång. We are a skilled, dedicated, supportive, and international team of 12–15 people working on developing burners and combustors for gas turbines, focusing on high efficiency, low emissions, and future fuels such as hydrogen. Our Gas Services division offers Low-emission power generation through service and decarbonization. Zero or low emission power generation and all gas turbines under one roof, steam turbines and generators. Decarbonization opportunities through service offerings, modernization, and digitalization of the fleet. We can offer you employment benefits such as: reduction of working hours, advance vacation, health care allowance and an eventual possibility to a flexible working place. Who is Siemens Energy? At Siemens Energy, we are more than just an energy technology company. With ~100,000 dedicated employees in more than 90 countries, we develop the energy systems of the future, ensuring that the growing energy demand of the global community is met reliably and sustainably. The technologies created in our research departments and factories drive the energy transition and provide the base for one sixth of the world's electricity generation.  Our global team is committed to making sustainable, reliable, and affordable energy a reality by pushing the boundaries of what is possible. We uphold a 150-year legacy of innovation that encourages our search for people who will support our focus on decarbonization, new technologies, and energy transformation.  Find out how you can make a difference at Siemens Energy: https://www.siemens-energy.com/employeevideo Our Commitment to Diversity Lucky for us, we are not all the same. Through diversity, we generate power. We run on inclusion and our combined creative energy is fueled by over 130 nationalities. Siemens Energy celebrates character – no matter what ethnic background, gender, age, religion, identity, or disability. We energize society, all of society, and we do not discriminate based on our differences. Application Don’t hesitate – apply via https://jobs.siemens-energy.com/en_US/jobs , id nr 299733 not later than 2026-08-28. Ongoing selection is applied, the role might be filled before last application date. We refrain from all contact with staffing and recruitment companies, or advertising brokers. Location: Finspång Trade Union Representatives: Unionen, unionen.finspang.se@siemens-energy.com Sveriges Ingenjörer & SACO, asi.se@siemens-energy.com Ledarna, Anders Fors, ledarnaklubbenseab@siemens-energy.com IF Metall, Mikael Malmgren, mikael.malmgren@siemens-energy.com #LI-NT1