SERVICES

Meet the Team

Gatter & Diehl strives to provide our clients with the highest-quality, most dependable, cost-effective engineering, design and construction management services in the industry.

TEAM

SERVICES

Pre-construction Planning

With our expertise in technical design, we provide valuable master planning and facility systems assessments of existing conditions. We can help you prepare for a future facility, expansion, or campus-wide needs of any size.

Engineering

From land development through occupancy, our team of experienced professionals can guide your project through all administrative, permitting, and technical phases.

Analysis

Combining our vast experience with the latest software tools such as; Building Information Modeling (BIM), Total Building Energy Modeling, IGSHPA Geothermal Software, Solar Analysis Software, Combined Cooling Heating & Power Software (CCHP & CHP) yields superior results.

Project Management

Our project management experience includes complex projects in excess of $20 million and 100,000 sq. ft. in scale. From planning through estimating, design, bidding, award and through occupancy, we perform all services working closely with owner executives to achieve excellence and control costs.

Jeff Crist, PE-LEED AP BD+C
President

Rich Kreiger, PE-LEED AP BD+C

Vice President

KEY STAFF

Rob Henning

Brady Dolan, EIT

Mike Comp

Tony Montreal

Dorsey Wertz, PE

Ethan Hess

Lucas Smith, EIT

Maria Mercado

Andrew Andreyo, PE

Hannah Roy

Jordan Crist

Seth Crist

Daniel Crist, EIT

Justin Smith

Andre Ballard Jr.

Beverly Williard

MEET OUR TEAM

Gatter & Diehl's staff provides outstanding designs and unsurpassed service that, together, delivers premium value to each client.

1946

5,000+

30

20

Year Established

Projects Completed

USGBC LEED

Projects

Licensed

States

PLANNING. ENGINEERING. ANALYSIS. CONSTRUCTION SERVICES. COMMISSIONING.

Celebrating 80 Years in the Engineering Insdustry!

In 2026, Gatter & Diehl proudly commemorates a significant milestone—80 years of distinguished service within the engineering profession. Founded in 1946 in Harrisburg, Pennsylvania, the firm was built upon enduring principles of technical excellence, professional integrity, and an unwavering commitment to client success. These core values have guided Gatter & Diehl for eight decades and continue to shape its work today.

From its earliest beginnings, Gatter & Diehl has cultivated a highly respected legacy of delivering comprehensive planning, engineering, analysis, and construction management services to the communities it proudly serves. With offices now located in Mechanicsburg and Bedford, Pennsylvania, the firm supports a diverse public and private client base across healthcare, education, high-end commercial, and senior living markets, providing tailored solutions that meet complex and evolving needs.

This 80-year anniversary stands as a testament to the people who have defined the firm—its leadership, dedicated staff, trusted partners, and loyal clients—whose collaboration and confidence have fueled sustained growth and success. As Gatter & Diehl looks to the future, it remains steadfast in its commitment to advancing thoughtful, reliable engineering solutions designed to endure and serve generations to come.

PROJECTS