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   Owners

Hiram Ribblett, P.E. (PA, OH, WV)

President/Treasurer
Somerset Office (814) 266-6402
hribblett@earthtechinc.net

Experience:
Mining and civil engineering
Engineering design and operations
Water pollution, erosion, and sedimentation control
Pumping and water handling facility design

Thomas J. Matisko

Vice President/RSO/Operations Manager –
Materials Testing/Geotechnical Investigations/ Construction Oversight

Somerset Office: (814) 266-6402
tmatisko@earthtechinc.net

Experience:

Geotechnical field services and construction inspection/testing
Formerly WACEL Concrete Certification Level I & II, Soils Level I & II, Structural Inspection Level I
Troxler Nuclear Gauge Certification

Ryan D. Stairs, P.G. (PA)

Vice President/Operations Manager –
Geology & Mine Permitting/Planning

Somerset Office (814) 266-6402
Uniontown Office (724) 439-1313
rstairs@earthtechinc.net

Experience:
Hydrology and mining geology
Mineral reserve studies
Wetland delineations
Groundwater well design and installation
Geotechnical investigations
PennDOT Level 1 Drilling Inspector

Jason P. Horner, P.E. (PA, MD)

Corporate Secretary/Operations Manager –
Drafting/ Engineering Technicians/Civil Site Development/Surveying

Somerset Office: (814) 266-6402
jhorner@earthtechinc.net

Experience:
Civil and mining engineering
Erosion and sedimentation control
Stormwater Management
Land development planning
Subdivision planning
AutoCad 2015, Carlson Civil/Survey 2015