Who We Are

Keith J. Walkowski, P.L.S.

Keith J. Walkowski, P.L.S. Partner

Office: 715-241-7500
Cell: 715-574-6767
Email: [email protected]

Career Summary

Aside from his role as a partner in Riverside Land Surveying LLC, Keith’s primary responsibilities include office management, project management, and fieldwork.  He is skilled in formulating project bids, drafting survey maps and subdivisions, as well as performing construction staking on State, municipal and private construction projects.  Keith also handles many business and accounting functions and provides customer service to a growing number of residential and business clients.

Prior to joining Riverside Land Surveying LLC, Keith was a survey crew chief at a large engineering firm in Central Wisconsin. In 2004, he received his State license, during which time, he had extensive responsibilities for providing construction staking, providing boundary surveys, and drafting survey maps.  In 2000, Keith obtained his Associate Degree in Land Surveying from Nicolet Technical College, Rhinelander, Wisconsin. 

Keith is an active member and a volunteer at his local church, and enjoys a membership with the Wausau Chamber of Commerce through Riverside Land Surveying LLC.

Certification/Registration and Professional Affiliations

  • Professional Land Surveyor
  • Trimble Real Time Kinematic GPS Training
  • Wisconsin Society of Land Surveyors (State and Local Chapters)

Nathan J. Wincentsen, P.L.S. Partner

Office: 715-241-7500
Cell: 715-571-3669
Email: [email protected]

Chris Fieri, P.L.S. Professional Land Surveyor

Office: 715-241-7500
Email: [email protected]

Career Summary

Chris has been a Professional Land Surveyor in the State of Wisconsin since 2015 and has worked for several private firms in the Central and Northern regions since 2003. He also worked as the County Surveyor for Marathon County from 2015 – 2019 and as the county’s Land Surveying Technician from 2010 – 2013 and spent three years surveying for a small firm out of Concord, New Hampshire. Chris has performed most types of surveys involved in the field of surveying including boundary surveys, topographic surveys, ALTA surveys, elevation certificates and LOMAs. He has experience in construction staking, performed control work for aerial photography projects, and has led numerous section corner remonumentation projects.  At Riverside, Chris works primarily performing boundary surveys, taking the jobs from start to finish. He corresponds with clients, works with governing municipalities, researches all pertinent records, performs the field work, and drafts the appropriate maps to be filed or recorded.

Certification/Registration and Professional Affiliations

  • Associates Degree of Applied Science – Land Surveying Technician
  • Professional Land Surveyor in the State of Wisconsin
  • National Society of Professional Surveyors (NSPS)
  • Wisconsin Society of Land Surveyors (WSLS)
    • Central Chapter
    • State Society