LiquidPiston

Human Resources Manager - LiquidPiston

LiquidPiston • $90K — $120K *
Suffield, CT 06078In-Person
Technical Services
5 - 7 years of experience
Today
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Job Overview by Ladders

Qualifications

  • Five or more years of progressive HR experience managing core HR operations.
  • Practical experience in payroll, benefits, employee relations, performance management, and HR compliance.
  • Strong knowledge of federal and state employment laws and HR documentation requirements.
  • Demonstrated ability to improve HR processes and administer HRIS or payroll systems.
  • Excellent organizational, judgment, and communication skills.
  • Ability to prioritize competing demands and take ownership in a growing organization.

Responsibilities

  • Manage day-to-day HR operations, including recruiting, onboarding, and personnel records.
  • Coordinate compliant offer letters with hiring managers and recruiters.
  • Maintain accurate employee records and keep HR policies updated.
  • Continuously enhance HR workflows for efficiency and effectiveness.
  • Ensure accountability for biweekly payroll and resolve payroll issues promptly.
  • Select and manage various employee benefit plans and handle inquiries.
  • Support performance-review processes and employee development initiatives.

Benefits

  • PTO for work-life balance and recharge time.
  • Comprehensive medical, dental, and vision coverage options.
  • Potential for equity participation through RSUs.
  • 401(k) with up to 100% matching contributions after one year of employment.
  • Access to ongoing training, mentorship, and career growth opportunities.
Full Job Description
Human Resources Manager - LiquidPiston
This role is fully onsite in Bloomfield, CT, five days per week. The company will be relocating to Suffield, CT later in 2026.
The Opportunity:
We are seeking a hands-on Human Resources Manager to own core HR operations and strengthen the people systems that support our continued growth. This role manages the full employee lifecycle and serves as a trusted partner to leadership, managers, and employees across payroll, benefits, employee relations, performance management, compliance, recruiting support, and HR systems. The successful candidate will be comfortable working independently, solving problems, and building clear, scalable processes in a dynamic technical organization.
Key Responsibilities:
HR Operations and Employee Lifecycle
  • Own day-to-day HR operations across recruiting support, hiring, onboarding, employee changes, offboarding, and personnel records.
  • Coordinate compliant offer letters in partnership with hiring managers and the company recruiter.
  • Maintain accurate, confidential employee records and keep the Employee Handbook, HR policies, and supporting documentation current.
  • Continuously improve HR workflows, controls, and documentation to reduce cost, eliminate recurring errors, and increase efficiency and effectiveness.
Payroll, Benefits, and HR Systems
  • Maintain overall accountability for biweekly payroll, with payroll processing performed by the Front Office and Finance & Accounting team.review PTO and leave balances, and resolve payroll issues promptly.
  • Select and administer medical, dental, vision, disability, and related benefit plans, including renewals, open enrollment, enrollments, changes, and employee inquiries.
Employee Relations, Performance, and Culture
  • Serve as a trusted resource to employees and managers on policies, workplace practices, employee relations, and day-to-day HR questions.
  • Lead quarterly and annual performance-review cycles and support performance plans, employee development, training, and manager follow-through.
  • Develop initiatives that strengthen engagement, retention, morale, accountability, teamwork, and the overall employee experience.
Compliance and Organizational Support
  • Maintain compliance with federal, state, and local employment requirements, including offer letters, notices, workplace postings, leave administration, audits, and remote-employee registrations.
  • Coordinate employment visas and complex legal or compliance matters with external counsel and professional advisors as needed.
  • Maintain co-op and internship relationships with partner universities and support related early-career programs.
  • Manage related HR and administrative projects, including employee expense-report coordination, to ensure smooth and reliable HR operations.
Required Qualifications
  • Five or more years of progressive HR experience, including hands-on ownership of core HR operations.
  • Practical experience with payroll, benefits administration, employee relations, performance management, recruiting support, and HR compliance.
  • Strong working knowledge of federal and state employment laws, HR documentation requirements, and sound HR practices.
  • Experience improving HR processes and administering HRIS, payroll, or timekeeping systems.
  • Excellent organization, judgment, discretion, attention to detail, communication, and interpersonal skills.
  • Ability to work independently, prioritize competing demands, and take ownership in a growing organization.
Preferred Qualifications
  • Bachelor's degree in Human Resources, Business Administration, or a related field.
  • Experience in a startup, technology, engineering, manufacturing, R&D, or other fast-paced technical environment.
  • Experience building scalable HR infrastructure or supporting employees across multiple functions or locations.
  • Experience with internship, co-op, early-career, or employment-visa programs.
Benefits & Perks:
  • 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: Employes may 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% after 1 year of employment.
  • 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
Manufacturing & Automotive
Net Income
-$1 million
Founded
2004
Revenue
$1 million
* Ladders Estimates

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