Human Resources Manager

Liquid Piston | Bloomfield, CT (Relocating to Suffield, CT in 2026)

Fully onsite – Monday through Friday

First Search is partnering with Liquid Piston, an advanced technology company developing innovative rotary engine propulsion and power solutions for aerospace, defense, and commercial applications, on their search for a Human Resources Manager.

Liquid Piston’s patented technology enables compact, efficient, high-performance systems for next-generation platforms across aerospace, defense, and commercial markets.

The company operates in a fast-paced environment where innovation, technical excellence, practical execution, and continuous improvement are key to its success.

Liquid Piston is seeking a hands-on Human Resources Manager to own and enhance HR operations as the company continues to grow. This role will serve as a trusted partner to leadership, managers, and employees while managing critical HR functions across the employee lifecycle.

The ideal candidate is an experienced HR professional who enjoys building processes, improving systems, and creating scalable solutions in a growing technology organization. This position requires someone who is comfortable working independently, solving problems, and balancing strategic initiatives with day-to-day HR responsibilities.

• Manage day-to-day HR operations, including onboarding, employee changes, offboarding, personnel records, and HR documentation.
• Partner with hiring managers and recruiting resources to support hiring processes and employment documentation.
• Maintain and continuously improve HR policies, procedures, employee handbook updates, and HR workflows.
• Identify opportunities to improve efficiency, strengthen processes, and support organizational growth.

• Oversee biweekly payroll processes in partnership with Finance and administrative teams.
• Manage PTO and leave tracking and resolve employee payroll-related questions.
• Administer employee benefit programs, including medical, dental, vision, disability, open enrollment, and employee changes.
• Maintain accurate HR records and support HRIS and system improvements.

• Serve as a resource for employees and managers on HR policies, workplace practices, and employee relations matters.
• Support performance management processes, including reviews, development plans, and manager guidance.
• Develop initiatives that strengthen engagement, retention, collaboration, and company culture.
• Provide coaching and support to managers on employee-related matters.

• Ensure compliance with federal, state, and local employment requirements.
• Maintain employment documentation, workplace postings, audits, and compliance materials.
• Coordinate employment authorization matters with external legal partners as needed.
• Support internship and university partnership programs.
• Lead and support additional HR initiatives and projects as needed.

• 5+ years of progressive HR experience with ownership of core HR operations.
• Experience with payroll, benefits administration, employee relations, performance management, recruiting support, and HR compliance.
• Strong knowledge of employment laws, HR best practices, and documentation requirements.
• Experience improving HR processes and administering HRIS, payroll, or related systems.
• Strong communication, organization, judgment, discretion, and attention to detail.
• Ability to work independently, prioritize competing demands, and take ownership in a growing organization.

• Bachelor’s degree in Human Resources, Business Administration, or related field.
• Experience supporting a startup, technology, engineering, manufacturing, R&D, or other technical organization.
• Experience building HR infrastructure within a growing company.
• Experience managing internship, co-op, or early-career programs.
• Experience supporting employees across multiple locations or employment authorization programs.