We owe the success of Hammontree & Associates to every client, project, and employee. 

Hammontree & Associates, Limited is a regional provider of professional civil engineering and surveying services to both public and private clients. The firm's reputation has grown to place them among the leaders in consulting civil engineering and survey  firms. 

Morris Knowles & Associates, Inc. (A Hammontree Company) is located near Pittsburgh, Pennsylvania, Morris Knowles is a full-service civil engineering and land surveying firm. The firm has been recognized as a leader in civil engineering and surveying to the public, local, state, and federal agencies. 

Principals and Managing Partners of the Firm

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Charles F. Hammontree, P.E., P.S. - CEO and Managing Partner 
of Hammontree & Associates, Limited and Morris Knowles
& Associates, Inc. (A Hammontree Company) 


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James C. Bollibon, P.E. P.L.S. - President of
Morris Knowles & Associates, Inc. and Managing Partner


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Michael M. Vale, P.E., CPESC - Executive Vice President of
Hammontree & Associates, Limited and Managing Partner


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William P. Utzman, P.E., CPESC - Vice President of
Morris Knowles & Associates, Inc. and Managing Partner


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Mark M. Zimmerman, P.E., CPESC, CPSWQ - Managing Partner


It is the Hammontree & Associates and Morris Knowles & Associates, Inc. philosophy to invest in technology and training to deliver the services required to make every project a success.

Service areas include:

  • Civil Site Development 
  • Energy Support and Permitting
  • Pipelines
  • Transportation and Bridge Engineering
  • Structural Engineering
  • Municipal Engineering
  • Environmental Science
  • Landscape Architecture
  • Surveying 
  • Drone U.A.V. Services
  • Field Construction Monitoring Services
  • Map Displays for Artistic Presentation

Certifications include:

  • ODOT
  • Listed with ODNR - Dam Design
  • Listed with U.S. Army Corps of Engineers - Wetland Delineations and  Permits
  • CPESC (Certified Professionals in Erosion and Sediment Control)
  • CPSWQ (Certified Professionals in Storm Water Quality)
  • Registered Landscape Architects on Staff
  • ACSM Technician Certification Program
  • Army Corp of Engineers · EPA
  • National Institute for Certifying Engineering Technician