H & D Mechanical

A Foundation of Expertise and Innovation

H&D Mechanical, founded in 2009 by Sean Duffy and Erik Harley, is a trusted mid-size mechanical contractor based in Upper Marlboro, Maryland. We take pride in delivering exceptional work across a diverse range of projects, including medical, scientific, and commercial endeavors.

Building a Safer and More Efficient Future

Our work extends far beyond the physical installation and maintenance of mechanical systems. We focus on creating safe and efficient working environments by integrating cutting-edge technology with skilled craftsmanship. This philosophy has allowed us to establish strong relationships with clients across industries, including:

• Biotech & Healthcare: Ensuring the functionality and sterility of medical facilities.
• Scientific Institutions: Supporting research and development through reliable scientific infrastructure.
• Commercial Buildings: Enhancing the efficiency and sustainability of office and retail spaces.

Comprehensive Mechanical Expertise

H&D Mechanical offers a comprehensive suite of services, covering all aspects of mechanical construction:

**Mechanical Services

• Balancing & Commissioning
• Assists & Controls
• Facility Management
• HVAC (Heating, Ventilating & Air Conditioning)
• Medical Gasses & Plumbing
• Plumbing & Mechanical Service
• Sheet Metal & Value Engineering
• Preconstruction & Design/Build
• Design/Assist & Green Building Solutions

Quality and Efficiency at Every Stage

We prioritize quality and efficiency throughout every stage of the process, from preliminary planning and design to construction and post-installation support. Our team of experienced professionals works collaboratively with clients to:

• Establish clear project goals and expectations.
• Develop comprehensive plans and strategies.
• Implement efficient construction practices.
• Deliver exceptional customer service.

A Commitment to Sustainability

H&D Mechanical is committed to sustainability and environmentally responsible practices. We actively seek innovative solutions that conserve energy, reduce emissions, and minimize construction waste. This dedication aligns with our mission to create a healthier and more sustainable future for our clients and communities.