Engine Design Engineer

About LiquidPiston

LiquidPiston (LPI) is revolutionizing the internal combustion engine. Our patented High Efficiency Hybrid Cycle (HEHC) and rotary X-engine platform enable compact, ultra-efficient, and power-dense engines for hybrid, aerospace, and power generation applications. We are a mission-driven team of innovators determined to push the boundaries of energy and propulsion.

Position Overview
We are seeking talented and motivated Engine Design Engineers to join our growing team. In this role, you will be at the forefront of developing groundbreaking engine systems and components-from initial concept through prototyping, validation, and production. You will collaborate with cross-functional teams to design, analyze, and optimize high-performance subsystems with a focus on efficiency, weight, durability, manufacturability, and cost-effectiveness.Key Responsibilities

• Collaborate with multidisciplinary teams to define system and component-level requirements aligned with overall engine architecture and performance goals.
• Design, package, and integrate components into the complete engine assembly, ensuring alignment, mechanical integrity, and functional performance.
• Conduct feasibility studies and tradeoff analyses; develop conceptual and detailed designs for engine subsystems.
• Create 3D CAD models and engineering drawings using SolidWorks; release designs for prototyping and production.
• Perform or lead design validation activities, including FEA, thermal, and vibration analyses.
• Drive virtual simulation efforts and support the use of analysis tools for thermodynamic and mechanical performance modeling.
• Maintain accurate documentation including BOMs, engineering change orders, technical reports, and design specifications.
• Support design-for-manufacturing (DFM), quality assurance, and serviceability initiatives in collaboration with other functions.
• Identify and resolve design issues quickly and effectively, driving continuous improvement and root-cause solutions.
• Plan and execute design validation processes including D/PFMEA, DVPR, and design reviews.
• Support sourcing efforts and supplier interface activities related to component manufacturing and quality control.
• Participate in and lead technical presentations to internal stakeholders and external partners.

You Are:

• A strong mechanical engineer with direct experience in engine or complex mechanical system design.
• Capable of managing the full lifecycle of components-from concept through post-production support.
• A hands-on problem solver with strong analytical and creative thinking skills.
• Passionate about innovation, with a practical, execution-focused mindset.
• Highly collaborative, but also able to work independently with minimal supervision.
• Technically deep, with knowledge of rotary or combustion engines, thermofluid systems, and mechanical integration challenges.
• Proficient in CAD and simulation tools-SolidWorks, FEA, and engine modeling software (e.g., GT-Power or AVL) a plus.
• An excellent communicator, with strong written, verbal, and presentation skills.

Qualifications

• Bachelor's or Master's degree in Mechanical Engineering or related field.
• 3+ years of experience in engine design, preferably in automotive, aerospace, marine, or power generation industries.
• Working knowledge of thermodynamics, combustion, and fluid mechanics.
• Experience with engine performance modeling tools (GT-Power, AVL, ANSYS, etc.).
• Strong understanding of DFM principles and production processes.
• Hands-on experience with prototyping, testing, and data analysis.
• Familiarity with product development tools including MS Project, Excel, Word, and PowerPoint.

Benefits

• Flexible PTO to encourage work-life balance and personal well-being
• Comprehensive healthcare coverage: medical, dental, and vision plans
• Equity participation: RSUs for all permanent employees
• 401(k) with match: 100% up to 3%, plus 50% match for 3-5% range
• Growth opportunities: Mentorship, training, and leadership development

Our Culture
At LiquidPiston, we challenge convention and solve hard problems. We move fast, think boldly, and iterate quickly. Our team thrives on collaboration, creativity, and resilience. We take calculated risks and believe that every setback is a steppingstone toward breakthrough innovation.
Equal Opportunity Employer
LiquidPiston, Inc. is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment regardless of race, color, religion, gender, sexual orientation, gender identity, national origin, or veteran status, and will not be discriminated against on the basis of disability.
All offers of employment at LiquidPiston are contingent upon the successful completion of a pre-employment background check and drug screening.