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Decade of Accomplishments


Our Decade in Review

Over the past 10 years, Gatter & Diehl has worked diligently on becoming a more diverse and influential company by implementing the latest technologies in energy efficient designs. This emphasis has led to extraordinary breakthroughs that included designing one of Pennsylvania's largest public education solar array installations and winning the Pennsylvania State Governor's Award for Environmental Excellence three consecutive years.


We have also witnessed numerous changes and additions throughout the past decade. Our new corporate headquarters was constructed in 2010 in Mechanicsburg, PA due to the expanded growth within the company. We’ve attracted new and substantial clients that we’ve been able to form long-lasting relationships with. And our employees were recently offered access to full healthcare benefits for them and their families.


As technology evolves, so do we. It's our prime focus to maintain a high standard in energy efficiency and satisfactory for our clients. As we enter the next decade, we look forward to new challenges that will push us to become an even stronger company in the future. 

Highlights of Projects & Specialty Services

  • Designed Over 700 Projects

  • Designed Over 30 Geothermal Projects

  • Designed Over 20 USGBC LEED Projects Earning Gold or Plantinum Rating

  • Presented to the United States Congress

  • 3x Winner of the Pennsylvania State Governor's Award for Environmental Excellence (2014-2016)

  • Designed One of Pennsylvania's Largest Public Education Solar PV Array Installations

  • Designed 166,000 sq. ft. Elementary Center for Lehighton Area School District

  • Designed a Co-generation System for Phoenix Contact that affected 360,000 sq. ft.

  • Designed a 120,000 sq. ft. Independent Senior Living Facility at St. Anne's Retirement Community