About Us

To reduce, as much as possible, the consumption of finite energy resources



We will help our clients cut energy consumption by:

• Eliminating waste,

• Improving efficiencies, and

• Guiding them toward a sustainable energy future.

As a result, our clients will:

• Reduce operational expenses, enabling reinvestment in
  people,  product, and profits.


• Reduce their environmental impacts, to sustain life and


• Achieve control over energy use and costs, providing greater
  certainty and security for planning, budgeting and investing.


Practical Energy Solutions is a fast-growing, independent, local energy consulting firm with multiple partnerships, contract employees, and technical resources at the ready.

Our core office-based team members are always there for you. Pictured here near our headquarters in West Chester, PA, are (l to r): Justin Murray, Director of Technical Services; Dianne Herrin, Director of Energy Programs; Paul Spiegel, President; and Ben Pressman, Senior Engineer.


As founder and President of Practical Energy Solutions, Paul is a visionary who believes in the power of people to make a difference. Paul has the unusual gift of having equally outstanding analytical and verbal skills, which he puts to good use ensuring that our clients get real, honest value when they do business with us. Paul is particularly well-known for developing creative solutions to even the most challenging problems.

Paul has extensive expertise in energy auditing, strategic energy planning, rate analyses, capital investment analyses, energy education/panel presentations, and building construction. Prior to founding Practical Energy Solutions, he was principal or project manager for numerous large-scale commercial projects – including Lincoln Financial Field, Kimmel Center, Philadelphia Airport Terminal A, and Wachovia Center, just to name a few.

Paul's commitment also extends to the broader community. He is a Senior Member of the Association of Energy Engineers, a Business Associate Member of the Pennsylvania Association of School Business Officials (PASBO), a board member of The Sustainable Business Network Philadelphia Chapter, and a member of the Delaware Valley Green Building Council, Greater Philadelphia Chamber of Commerce and the Smart Energy Initiative. He has also served his community as a participant in the ASTM Building Energy Performance Disclosure Task Force and is past-Chairman of the West Goshen Planning Commission.

Paul Spiegel, P.E., LEED AP


Dianne brings to PES a strong personal commitment to a sustainable energy future. She combines her technical communications expertise, analytical capabilities, and strategic planning skills to help our clients see an achievable and positive energy path forward.

Dianne has 8 years of experience in the energy field, prior to which she spent 10 years managing her technical research and communications business. She is founder/past-Chair of West Chester Borough’s nationally recognized BLUER Committee (www.wcBLUER.org). As President of Moms for the Future, Dianne championed the successful effort to convert school buses in 5 Chester County districts to a B20 biodiesel blend. She also received the 2nd annual Chester County Citizens for Climate Protection Gene Wilson Award for her community-based energy reduction and climate mitigation work.

Dianne served as Co-Chair of the West Chester Area School District Community Budget-Utilities Task Force, was as an active member of the 2012 PA Codes Coalition, and is an Advisory Member to the Delaware Valley Green Building Council’s Green Schools Circle. She has training and experience with LEED Operations + Maintenance, carbon accounting/reporting, municipal energy planning, energy master planning, and ISO 50001 certification.

Dianne Herrin, LEED AP - O+M

Director of Energy Programs

Justin is an Association of Energy Engineers’ Certified Energy Auditor (CEA) with more than 8 years of experience in energy efficiency consultation, civil and wastewater engineering, and environmental/conservation work.

Justin has excellent engineering and mathematical skills that, combined with his communications abilities, help him provide superior energy assessment and consultative services to our clients. He has performed more than 150 commercial energy audits in the region, provided consultation and coordination services for many successful energy efficiency implementation projects, and performed construction oversight and inspection of both public and private construction projects.

Justin is a trained building energy modeler in multiple platforms and is a local and national member of the Association of Energy Engineers. Prior to attending college, Justin was a full-time AmeriCorps service member in New Hampshire, where he designed and taught a 12-week environmental education curriculum to students and performed trail work projects throughout the state. Justin is co-chair of the Ambler Borough Environmental Advisory Council.

Justin S. Murray, CEA
Director, Technical Services