Senior Engine Sealing Engineer

LiquidPiston Inc.; Bloomfield (CT); On-site; USD 100,000 - 130,000; Full time

Benefits offered by this job

Flexible PTO

Health & Wellness coverage

Equity Participation

401(k) Match

Career Growth opportunities

Job summary

LiquidPiston Inc. in Bloomfield, CT, is seeking a Senior Simulation Engineer to lead the design and validation of rotary engine sealing systems. The candidate will apply advanced principles of tribology and materials science to improve seal performance and reliability in high-temperature environments.

This role involves collaboration with engineering teams, utilizing simulation tools like FEA, and hands-on problem solving. The ideal candidate should have 5+ years of relevant experience and a dedication to innovation.

Benefits include flexible PTO, health coverage, and career growth opportunities.

Qualifications

• 5+ years of experience in design and validation of ICE components.
• Proficiency in using advanced simulation tools for engine performance.
• Strong analytical and problem-solving skills.

Responsibilities

• Lead the design and validation of rotary engine sealing systems.
• Collaborate with engineering teams on high-temperature components.
• Apply tribology principles to minimize friction and ensure durability.

Skills

Advanced engineering simulation tools

Matlab

Python/C++

High-temperature materials science

Tribology principles

Education

Bachelor’s degree in Mechanical Engineering, Materials Science, or a related field

Master’s degree (preferred)

Tools

Ansys

FEA/CFD software

Job description

Senior Simulation Engineer (Bearings & Seals)

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

At LiquidPiston, we’re redefining what’s possible in internal combustion. Our patented X-Engine architecture delivers a lighter, smaller, and more efficient solution compared to traditional engines – enabling new capabilities across aerospace, defense, and clean power generation. We’re not just building engines – we’re pushing the boundaries of innovation in power and propulsion. As part of our team, you’ll work alongside passionate engineers, designers, and researchers committed to solving hard problems and bringing cutting‑edge technology to life. If you’re excited about clean‑sheet engine design, real R&D challenges, and the opportunity to make a direct impact in a small, agile team – this is your chance to help build something truly revolutionary.

Position Overview

The Senior Simulation Engineer will lead the design, development, and validation of rotary engine sealing systems and related components. This role involves applying advanced principles of tribology, materials science, and dynamic simulation to optimize seal performance, durability, and reliability under demanding operating conditions. The position requires close collaboration with manufacturing and engineering teams, hands‑on problem solving during testing, and the ability to communicate technical findings effectively. The ideal candidate will have deep expertise in high‑temperature engine components, strong analytical skills, and a proven track record in independent and collaborative R&D projects.

Responsibilities

• Lead the design and refinement of the rotary engine sealing system, including Apex Seals and Face Seals.
• Contribute to the design, material selection, and optimization of journal bearings. Analyze bearing loads, clearances, oil flow, and housing deflection to ensure hydrodynamic stability and durability.
• Apply advanced principles of tribology to minimize friction, optimize lubrication, and predict/mitigate wear on seals and housing surfaces.
• Develop and utilize 1D/3D dynamic models to analyze seal motion, contact pressure, leakage, and flutter under various operating conditions (speed, temperature, load).
• Specify and qualify materials appropriate for high‑temperature, high‑pressure sliding contact, and collaborate with manufacturing partners on component specifications.
• Utilize Finite Element Analysis (FEA) to assess thermal distortion, structural integrity, and mechanical stress on sealing components and their supporting structures (rotor, housing).
• Design, execute, and analyze engine test plans focused on seal performance, durability and friction.
• Diagnose and resolve complex sealing‑related engine performance issues identified during dyno testing and field trials.
• Communicate findings clearly and effectively to stakeholders.

Requirements

• Bachelor’s degree in Mechanical Engineering, Materials Science, or a related field (Master’s preferred).
• 5+ years of experience in the design, development, and validation of ICE power cylinder ring packs and cylinder bores.
• Proficiency with advanced engineering simulation tools (e.g., FEA/CFD such as Ansys, and specialized Ring Dynamics software).
• Programming languages: Matlab (MUST), Python/C++.
• Deep understanding of high‑temperature materials science and their application in severe engine environments.
• Experience with advanced surface treatments or coatings for friction reduction and wear resistance.
• Proven ability to work independently and collaboratively in a fast‑paced R&D environment.

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.