Senior HVAC Site Mechanical Engineer – Company and Position Summary:
Rensair is a high-growth climate technology company transforming commercial buildings through sustainable indoor air quality (IAQ) and HVAC optimization. With offices in Philadelphia, Pennsylvania; Brooklyn, New York; London, UK; and Copenhagen, Denmark, Rensair helps some of the world's largest organizations reduce HVAC energy consumption by more than 40% while improving indoor air quality.
This is a unique opportunity for an experienced HVAC Mechanical Engineer to play a key role in expanding Rensair's U.S. business by serving as a trusted technical advisor to customers nationwide. Reporting directly to the U.S. CEO, the Senior HVAC Site Mechanical Engineer will lead complex HVAC system evaluations, collaborate with Rensair's international R&D team, and deliver innovative building optimization solutions for some of the world's largest commercial building owners.
This position is ideal for an experienced Mechanical Engineer with 5+ years of experience who can effectively provide technical leadership responsibilities while remaining hands-on with engineering, customer engagement, and field work. The ideal candidate will be based in the Philadelphia region, with the ability to work in a hybrid capacity from Rensair's Philadelphia office with convenient access to the airport. This role requires approximately 50% travel throughout the United States to support customer engagements.
Senior HVAC Site Mechanical Engineer – Responsibilities:
- Lead detailed technical assessments and engineering evaluations of commercial HVAC and ventilation systems to identify opportunities for improved indoor air quality, energy efficiency, and system optimization
- Collect, document, and analyze HVAC system performance data through field measurements including airflow, pressure, power consumption, ventilation effectiveness, and equipment performance
- Serve as the primary technical advisor for customers throughout the project lifecycle, including solution development, product selection, implementation, and identify expansion opportunities
- Lead technical site investigations, customer meetings, and engineering discussions for new and existing customers
- Collaborate with Rensair's global R&D and engineering teams by providing field insights and customer feedback to develop customized solutions and improve future products
- Prepare technical reports, engineering recommendations, presentations, and documentation for customers and internal stakeholders
- Partner with the commercial team to support technical evaluations, proposal development, RFP responses, and customer solution strategies
- Stay current with HVAC technologies, ASHRAE standards, building automation systems, energy efficiency initiatives, indoor air quality regulations, and commercial building trends
- Travel to customer sites throughout the United States (approximately 50%)
Senior HVAC Site Mechanical Engineer – Qualifications:
- Bachelor of Science degree in Mechanical Engineering or related engineering discipline required
- 5+ years of experience in commercial HVAC engineering, mechanical consulting, MEP engineering, commissioning, building systems, facilities engineering, energy engineering, HVAC controls, or related technical solutions
- Strong knowledge of commercial HVAC systems including air handling units (AHUs), rooftop units (RTUs), chilled water systems, ventilation systems, VAV systems, HVAC controls, and building automation systems
- Experience evaluating HVAC performance, troubleshooting mechanical systems, commissioning projects, or implementing energy optimization initiatives
- Strong analytical, problem-solving, and technical decision-making skills
- Demonstrated ability to lead technical projects, influence technical decisions, and collaborate effectively with customers, cross-functional teams, and executive stakeholders
- Excellent written and verbal communication skills with the ability to present technical concepts and engineering recommendations to customers, consultants, contractors, and leadership teams
- Strong analytical, problem-solving, and technical decision-making skills
- Ability to work independently in a fast-paced entrepreneurial environment while collaborating effectively with engineering, R&D, and commercial teams
- Ability to travel approximately 50%
Senior HVAC Site Mechanical Engineer – Compensation, Benefits & Growth:
- Competitive base salary with performance-based incentive compensation offering On-Target Earnings (OTE) up to $200,000
- Equity offering available upon hire
- Major Medical, Dental, and Vision - comprehensive healthcare reimbursement
- 24 days of paid time off plus company holidays
- Direct exposure to executive leadership with the opportunity to help shape the future of the U.S. engineering organization
- Opportunity for significant career advancement as Rensair continues to expand throughout North America
- Entrepreneurial culture where innovation, collaboration, and initiative are recognized and rewarded
- Work with industry leading technology that is helping commercial buildings reduce carbon emissions, improve indoor air quality, and achieve sustainability goals
Pay: $175,000.00 - $200,000.00 per year
Benefits:
- Dental insurance
- Health insurance
- Paid time off
- Vision insurance
Education:
Experience:
- HVAC Site Engineering: 1 year (Preferred)
Willingness to travel:
Work Location: Hybrid remote in Philadelphia, PA 19107
