About Us

Constellation is dedicated to providing commercial customers with cost-effective and energy-efficient heating and air conditioning solutions, plumbing and electrical service, and building automation. We can help you achieve the energy goals of your facility with scheduled maintenance for your mechanical systems, improved heating and cooling system efficiency, and controlled operating costs.

Our Capabilities & Qualifications

Services & Capabilities

Constellation knows you need more than energy to keep your business humming. That is why we provide high quality service through dependable professionals who can look after your systems. We offer the following service options:

Licenses & Qualifications

The quality of our professionals is our priority. We provide customer service and specialized training, we require our specialists to be fully licensed, insured, and bonded. Among the licenses we require are:

  • MD HVAC #10605
  • MD Master Electrician #13060
  • MD Master Plumber/Gas Fitter #89794
  • WSSC #72758

Areas We Serve

Constellation serves businesses in communities all throughout the state of Maryland. Some of the cities we serve include:

  • Baltimore
  • Hagerstown
  • Elkton
  • Rockville
  • Annapolis

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Our Commitments

A Commitment to Our Customers

We are committed to exceeding our customers’ expectations. This starts with our employees, who are dedicated to being the very best at what they do. Our culture creates an environment where we can focus on what matters most — delivering the best service and experience to our customers.

A Commitment to Clean Energy

We encourage the use of energy-saving products and services wherever possible. Similarly, we promote regular service and maintenance of heating and cooling systems, lighting retrofits, and building automation to help manage energy usage and improve overall equipment efficiency.

A Commitment to the Communities We Serve

We are proud to support the communities we serve by being a responsible corporate citizen. Our employees participate in a variety of community activities, including nonprofit boards, volunteer activities, and local trade associations.

Our Company


Since our founding in 1999, we have been motivated by the goal of becoming the best energy provider, earning your business through a commitment to service, reliability and innovation.

In our quest to provide the energy and services to transform our future, our innovations are part of meeting the challenges of the climate crisis while creating better options for customers. In addition to providing energy and maintenance services, we offer comprehensive energy solutions for commercial businesses.

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Service is our focus and our passion. We welcome the opportunity to provide you with additional information, details about services and availability, and to answer any questions you may have.

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