Senior Engine Performance Engineer

Senior Engine Performance Engineer
This role is fully onsite in Bloomfield, CT, five days per week, and the company will be relocating to Suffield, CT later in 2026.​​​​​​​

About LiquidPiston:
LiquidPiston is an advanced engine development company focused on revolutionizing internal combustion technology through its innovative rotary engine design. By rethinking traditional engine architecture, LiquidPiston is developing compact, efficient, and high power-density engines for a wide range of applications. The team operates in a fast-paced, engineering-driven environment focused on innovation, collaboration, and bringing cutting-edge technology to production.
Role Overview:
As a Senior Engine Performance Engineer, you will play a key role in advancing the development of LiquidPiston’s rotary engines toward production. Working closely with Chief Engineers, Design Engineers, and cross-functional teams, you will help define the data needed to guide engine architecture, design features, and calibration strategies. You will develop and execute test and analysis plans in collaboration with Test and Simulation Engineers, while occasionally performing high-level analyses or basic GT-Power simulations to support decision-making.
This role is heavily focused on data analysis and insight generation. You will review and interpret large datasets, draw conclusions, and make data-driven recommendations to stakeholders through presentations and detailed technical reports. You will also collaborate with Modeling and Simulation teams to integrate analytical results into your recommendations, while contributing to continuous improvement efforts that enhance the efficiency and effectiveness of engine performance development.
Key Responsibilities:

• Develop a deep understanding of the data required to inform engine architecture, design features, and calibration strategies that meet performance goals
• Partner with Test Engineers to create and execute test plans that generate critical experimental data
• Collaborate with Modeling and Simulation Engineers to define and execute simulation plans.  Review analytical outputs and incorporate insights into recommendations
• Perform rough order-of-magnitude analyses and basic GT-Power simulations as needed
• Take ownership of the quality and reliability of test and analysis results, including understanding assumptions and uncertainties
• Analyze experimental data in detail and present findings, recommendations, and supporting evidence to stakeholders
• Prepare comprehensive technical reports documenting test objectives, results, conclusions, and next steps
• Apply sound engineering judgment to balance aggressive timelines with risk and uncertainty
• Contribute to continuous improvement initiatives to enhance performance development processes
• Ensure compliance with safety standards and regulatory requirements
• Follow company policies related to data management, time reporting, IP protection, and compliance
• Communicate clearly and professionally with cross-functional teams
• Demonstrate ownership, maintain a positive and open-minded attitude, and adapt effectively to challenges and setbacks

Requirements:

• Bachelor’s degree in Mechanical Engineering or a related field (Master’s preferred)
• 5+ years of experience in engine performance development, testing, or calibration
• Strong understanding of internal combustion engines (rotary engine experience is a plus)
• Experience developing and executing engine test plans and analyzing performance data
• Familiarity with engine simulation tools such as GT-Power (or similar)
• Hands-on experience with engine testing equipment and measurement tools
• Strong analytical and problem-solving skills with the ability to interpret complex datasets
• Experience working in cross-functional engineering teams, including test and simulation
• Ability to clearly communicate technical findings to both technical and non-technical stakeholders
• Experience in an R&D or prototype environment is highly preferred
• Self-starter with strong attention to detail and a proactive, ownership-driven mindset

Benefits & Perks:

• Flexible PTO: We value work-life balance and encourage time to rest and recharge.
• Health & Wellness:  Comprehensive medical and voluntary dental, and vision coverage - you choose what works best for you.  
• Equity Participation: Permanent employees receive RSUs (Restricted Stock Units).
• 401(k) Match: We offer a 401k w/100% matching up to 3% of your salary and then 50% of contributions between 3-5%
• Career Growth: Ongoing training, mentorship, and learning opportunities to accelerate your growth.

Our Culture:
At LiquidPiston, we embrace challenges, move fast, and celebrate curiosity. Our team thrives on collaboration, creativity, and perseverance. We understand that innovation involves risk and we’re not afraid to fail as we move forward.
Equal Opportunity Employer:
LiquidPiston, Inc. is proud to be an Equal Opportunity Employer. Qualified applicants will not be discriminated against, and receive consideration for employment without regard to race, color, religion, gender, sexual orientation, gender identity, national origin, or protected veteran status or disability.
All offers of employment at LiquidPiston are contingent upon successful completion of a pre-employment background check and drug screening.