Douglas Seeber
Professional Engineer, Registered Landscape Architect
Doug has been working in the engineering industry since 1977 and has been with PSBA since 1981. His specialties include:
- Road and Highway Design
- Geometric Design
- Bridge and Culvert Hydraulics
- Mine Reclamation
- Water System Design
- Waste Water System Design
- Water and Sewer Main Design
- Flow Network Analysis
- Commercial, Industrial, Residential Subdivisions
- Construction Resident Engineering
- Municipal Engineering
- Project Management
Professional Engineer – IL, MO, IA
Registered Landscape Architect – IL
B.S. in Civil Engineering – Univ. of Illinois – Urbana – 1977
Terry Knoke
V.P. Keokuk Office
Professional Engineer, Registered Land Surveyor
Since joining PSBA, Terry has been involved with a wide variety of civil engineering, surveying and mapping projects. His specialties include:
- Road and Highway Design
- Geometric Design
- Water and Sewer Main Design
- Hydraulic Surveys and Analysis
- City Utility and Zoning
- Industrial Park Design
- Water System Design
- Waste Water System Design
- Land Surveying
- Drainage Studies
- Budget Estimating
- Project Management
Professional Engineer – IA, IL
Registered Land Surveyor – IA, IL
B.S. in Engineering Operations, Iowa State University – 1978
Tammy Depke
Professional Engineer
Since joining PSBA in 1998, Tammy has served as a project engineer on all phases of various civil engineering projects. Before joining PSBA, she was a Project Engineer for 6 years with Duke Engineering and Services, Inc. in Naperville, Illinois, providing consulting and engineering services to the commercial nuclear industry. Her interests and capabilities include:
- Road and Highway Design
- Water and Sewer Main Design
- Water System Design
- Waste Water System Design
- Storm Water Pollution Prevention
- Site Design
- Hydraulic Analysis
- Construction Observation
- Bridge Design
- Project Management
Professional Engineer in IL
M.S. Civil Engineering – University of Illinois at Urbana-Champaign – 1992
B.S. General Engineering – University of Illinois at Urbana-Champaign – 1991
Zachary Leach
Professional Engineer
Zach joined PSBA full time after graduating from Southern Illinois University in 2009. He had previously served as an engineering technician with PSBA in 2008. His interests and specialties Include:
- Road and Highway Design
- Geometric Design
- Recreational Trail Design
- Traffic Signal Design
- Mine Reclamation
- Water and Sewer Main Design
- Water Systems Design
- Waste Water Systems Design
- Construction Inspection
- Project Management
Professional Engineer – IL, MO, IA
M.B.A. – Quincy University – Quincy 2016
B.S. in Civil Engineering – Southern Illinois University – Edwardsville – 2009
- IADOT Certified AGG, PCC, HMA Plant Monitor / Materials Inspector and Erosion Control Technician
- MoDOT Certified AGG, PCC and HMA Plant Monitor / Materials Inspector
- ILDOT Certified PCC Materials Inspector
Nathen Leach
Professional Engineer
Nathen joined PSBA after graduating from Southern Illinois University in 2010. During his time at Southern Illinois University, Nathen was extremely active in Engineers without Borders. He previously served as an engineering intern with IDOT in 2009. His interests and specialties Include:
- Road and Highway Design
- Geometric Design
- Water and Sewer Main Design
- Water Systems Design
- Waste Water Systems Design
- Construction Inspection
- Project Management
Professional Engineer– IL, MO, IA
B.S. in Civil Engineering, Southern Illinois Univ., Edwardsville – 2010
Matthew Walker
Professional Engineer
Matthew Walker joined PSBA in January 2014. Matthew works in the Hannibal and Bowling Green, Missouri offices. He was previously employed by Great River Engineering, Inc. (GRE) as a Project Engineer, providing Bridge Design services for MoDOT’s BRO Program, CDBG and Credit Bridges; Construction Inspections; Surveying; and, General Civil Engineering Consulting services. Since joining PSBA, Mr. Walker has continued to serve his clients from GRE including construction and bridge projects.
Professional Engineer–MO
B.S. in Civil Engineering, University of Missouri, Columbia – 2008
Quentin Gehring
Professional Engineer
Quentin Gehring joined the PSBA team in July 2018 after 11 years working as a geotechnical engineering consultant in Alaska. Quentin also spent one year as a construction management consultant in Kansas and Nebraska. He has strong communication skills that keep clients and contractors well informed and projects on schedule. His experience includes: site characterization; shallow and deep foundation design; retaining wall design; anchored/guyed foundation systems; seismic hazards assessment and mitigation; ground improvement methods such as compaction grouting and dynamic compaction; embankment and pavement structure design for asphalt, concrete, and aggregate surfaced roads and airfields; and, non-intrusive geophysical techniques for supplemental site.
Professional Engineer–AK
B.S. in Civil Engineering, Univ. of Missouri – Rolla – 2004
M.S. in Civil Engineering, Univ. of Missouri – Rolla – 2006
Charlie Jones
Professional Engineer
Charlie joined PSBA in 2003 after retiring from the City of Quincy, where he served as City Engineer. His interests and qualifications include:
- Road & Highway Design
- Subdivision Layout and Design
- Hydraulic Analysis
- Storm Water Pollution Prevention
Professional Engineer – IL
B.S. in Civil Engineering, Univ. of Illinois – Urbana – 1971
Todd Clevenger
Electrical Systems Designer
Electrical After working with electronic systems in the service and electrical installations with a contractor, Todd joined PSBA in 2000. His specialties include:
- Electrical Services
- Interior and Exterior Lighting Designs
- Sound System Design
- Alarm System Design
B.S. in Electrical Engineering Technology – Missouri Institute of Technology – 1982
Memberships:
- Western Illinois Amateur Radio Club (Previous President)
- AutoCad Revit Certification
- Associated General Contractors – Certificate of Management – Building Information Modeling (CM-BIM)
- Illuminating Engineering Society
- Radio Club of America (RCA)
- First Christian Church of Camp Point – Elder
Bill Richards
Senior Engineering Technician
Bill joined PSBA in 2007, after previously serving as the Public Works Director for Keokuk, IA. He brings more than 36 years of professional experience in municipal government with responsibilities in upper level management, including all aspects of public improvements. His interests and qualifications include:
- Street Construction Design and Project Inspection
- Initial Planning for Storm Water Separation
- Sanitary Sewer System Design
- Domestic Water Supply Design
- Traffic Signal Improvements Conceptual Design
- Water Main Design
B.S. in Industrial Technology – Western Illinois University – 1968
- IADOT Certified AGG, PCC, HMA Plant Monitor / Materials Inspector and Erosion Control Technician
- MoDOT Certified AGG, PCC and HMA Plant Monitor / Materials Inspector
- ILDOT Certified PCC Materials Inspector
Dan Wilson
Senior Engineering Technician
Dan joined the engineering team of PSBA in 2010 with 22 years of experience in the Civil Engineering Industry. His specialties include:
- Highway Design
- CAD Specialist
- Plans and Specification Preparation
Highway Engineering Certificate – North Carolina State University – 1996
Geotechnical Engineering Certificate – North Carolina State University – 1996
Physics Certificate – North Carolina State University – 1996
James “Skip” Wilson
Senior Engineering Technician
James Wilson, better known as “Skip”, joined the Architectural-Engineering firm of Poepping, Stone, Bach, & Associates, Inc. (PSBA) in January 2015. Mr. Wilson is responsible for the inspection of bridges throughout the State of Missouri. While this is no small task, it is one Mr. Wilson is well-versed in as he was employed for nearly 30 years for MoDOT conducting bridge and highway maintenance and inspection. His specialties include:
- Construction Inspection
- Bridge Inspection
- Plans and Specification Preparation
University of Missouri – Columbia – 1976 – 1977
Steven H. Whitaker
Steven joined the engineering team of PSBA in 2017 with 35 years of experience in the concrete construction industry.
- ACI concrete field testing technician.
- ACI concrete strength testing technician
- MoDot Technician Certification
- State of Missouri Notary Public
- Missouri Licensed Real Estate Broker
