Senior HR Manager (part time)

DeWinter BH; New Jersey; On-site; USD 55,000 - 83,000; Part time

Job summary

DeWinter Group is seeking a hands-on Senior HR Manager to serve as a trusted advisor to leadership. You will manage complex employee relations, drive performance management, and develop scalable HR policies in a growing biotechnology environment.

This role is part-time, 20–30 hours per week, with potential for expansion, and offers contract-to-hire opportunities. You will guide leaders through sensitive workplace matters, coach managers, and help build HR infrastructure in a dynamic organization

Qualifications

• 10+ years of progressive, hands-on HR experience.
• 2) Approximately five years of experience at the HR Manager level or above.
• 3) Expertise managing complex employee relations, including terminations, disciplinary actions, investigations, and complaints.
• 4) Strong knowledge of federal, state, and local employment laws (FMLA, ADA, FLSA, wage/hour, anti-discrimination).
• 5) Experience creating HR policies, handbooks, templates, and workflows.

Responsibilities

• Own performance management, compliance, investigations, policy development and process improvement.
• Advise senior leadership on sensitive employee matters and organizational risks.
• Partner with leadership to align HR initiatives with business goals.

Skills

HR leadership

Employee relations

Policy development

Performance management

HR compliance

Coaching managers

Workforce planning

FMLA/ADA/FLSA knowledge

Education

Bachelor's degree in HR/Business

Job description

Senior HR Manager (Part-Time, Contract-to-Hire)

Overview

Join a growing biotechnology organization as a hands-on Senior HR Manager and trusted advisor to leadership. This high-impact role is ideal for an experienced HR professional who can confidently manage complex employee relations, guide leaders through sensitive workplace matters, and build practical HR infrastructure in a dynamic, evolving environment.

You will take ownership of key HR initiatives, including performance management, compliance, employee investigations, manager coaching, policy development, and process improvement. This is an opportunity to make a meaningful impact by establishing scalable HR practices while partnering closely with leadership on organizational and workforce needs.

The position is expected to begin at 20–30 hours per week, with flexibility regarding workdays and scheduling. As the organization continues to grow, the role may have the potential to expand.

Required Skills

• 10+ years of progressive, hands-on Human Resources experience
• Approximately five years of experience at the HR Manager level or above
• Demonstrated expertise managing complex employee relations matters, including:
• Sensitive terminations
• Disciplinary actions
• Workplace investigations
• Employee complaints
• Conflict resolution
• Performance-related issues
• Strong knowledge of federal, state, and local employment laws, including FMLA, ADA, FLSA, wage and hour requirements, and anti-discrimination regulations
• Experience developing and implementing HR policies, procedures, handbooks, templates, and workflows
• Proven ability to build or significantly improve HR processes in a startup, high-growth, entrepreneurial, or similarly evolving environment
• Experience creating structured performance management programs, including performance reviews, goal setting, and performance improvement plans
• Strong manager coaching skills, particularly related to performance, accountability, communication, and conflict resolution
• Ability to advise senior leadership on sensitive employee matters, organizational challenges, and employment-related risks
• Sound judgment, discretion, business acumen, and strong problem-solving skills
• Ability to work independently with minimal oversight and confidently manage confidential matters
• Comfortable navigating ambiguity, shifting priorities, and limited existing structure
• Excellent interpersonal, written, and verbal communication skills

Nice to Have Skills

• Experience in the biotechnology industry
• International HR experience, particularly involving Portugal
• Experience working in a startup or rapidly scaling organization
• Experience supporting organizational change, restructuring, or workforce planning
• Experience partnering with employment counsel on high-risk or sensitive matters
• SHRM-SCP, SPHR, or comparable HR certification
• Experience establishing HR functions or infrastructure from the ground up

Preferred Education and Experience

A bachelor’s degree in Human Resources, Business Administration, Organizational Development, or a related field is preferred. Candidates should have at least 10 years of progressive HR experience, including substantial responsibility for employee relations, compliance, performance management, and HR process development.

Other Requirements

• Work arrangement: Onsite only
• Primary location: Burlington, Massachusetts
• Ability to work onsite approximately 20–30 hours per week with flexibility regarding days and schedule
• Ability to travel to Boston as needed
• Contract-to-hire opportunity
• Must be comfortable handling sensitive, confidential employee and organizational matters
• Must be able to operate effectively in a hands-on role with evolving responsibilities and priorities