LiquidPiston

Senior Mechanical Simulation Engineer

LiquidPiston$110K — $130K *
Manufacturing & Automotive
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in Mechanical Engineering, Materials Science, or related field (Master's preferred).
  • 5+ years of experience in design, development, and validation of ICE power cylinder ring packs and cylinder bores.
  • Proficiency in advanced engineering simulation tools (e.g., FEA such as Ansys).
  • Strong programming skills in Matlab (must) and Python/C++.
  • Deep understanding of high-temperature materials science for severe engine conditions.
  • Experience with advanced surface treatments or coatings for friction reduction and wear resistance.
  • Proven ability to work in fast-paced R&D environments, both independently and in teams.

Responsibilities

  • Lead design and refinement of rotary engine sealing systems, including Apex and Face Seals.
  • Contribute to design and optimization of journal bearings, focusing on loads, clearances, oil flow, and housing deflection.
  • Apply tribology principles to minimize friction, optimize lubrication, and predict wear.
  • Develop and utilize dynamic models for analyzing seal motion and performance under varying conditions.
  • Specify and qualify materials for high-temperature, high-pressure sliding contact with manufacturing partners.
  • Conduct thermal and mechanical analysis (FEA) to assess sealing component integrity.
  • Design, execute, and analyze engine test plans for seal performance and durability.
  • Troubleshoot and resolve complex sealing-related engine issues during testing.

Benefits

  • Flexible PTO for work-life balance and personal time.
  • Comprehensive health and wellness coverage options including medical, dental, and vision.
  • Equity participation through RSUs for permanent employees.
  • 401(k) match with full matching up to 3% and partial match between 3-5%.
  • Ongoing training and mentorship for career growth opportunities.
Full 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.

Position Overview:
The Senior Mechanical 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:
  • Rotary Seal Development: Lead the design and refinement of the rotary engine sealing system, including Apex Seals and Face Seals.
  • Journal Bearing Design: 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.
  • Tribology and Wear: Apply advanced principles of tribology to minimize friction, optimize lubrication, and predict/mitigate wear on seals and housing surfaces.
  • Dynamic Simulation: Develop and utilize 1D/3D dynamic models to analyze seal motion, contact pressure, leakage, and flutter under various operating conditions (speed, temperature, load).
  • Materials and Manufacturing: Specify and qualify materials appropriate for high-temperature, high-pressure sliding contact, and collaborate with manufacturing partners on component specifications.
  • Thermal and Mechanical Analysis (FEA): Utilize Finite Element Analysis (FEA) to assess thermal distortion, structural integrity, and mechanical stress on sealing components and their supporting structures (rotor, housing).
  • Validation and Testing: Design, execute, and analyze engine test plans focused on seal performance, durability and friction.
  • Troubleshooting: 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 such as Ansys)
  • 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.

About LiquidPiston

LiquidPiston is an American company that develops and licenses advanced rotary internal combustion engines. The company's engines are designed to be more efficient and compact than traditional piston engines, with the potential to reduce fuel consumption and emissions. LiquidPiston's engines are based on the company's patented High Efficiency Hybrid Cycle (HEHC) technology, which combines elements of the Otto, Diesel, and Atkinson cycles to achieve high thermal efficiency. The company's engines have potential applications in a variety of industries, including automotive, aerospace, and military.
Learn more about LiquidPiston
Size
50 employees
Industry
Net Income
-$1 million
Founded
2004
Revenue
$1 million

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