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We take pride in our ability to offer quality services in alignment with our clients' budgets and time restraints. When you work with Harris & Associates, you will be working with one of our experienced professionals.
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Robert (Bob) D. Tollefson
Professional Engineer

Bob has over 35 years experience in structural and civil engineering. Over 31 of those years have been with Harris & Associates.


Bob has a vast background in structural engineering related to building design for commercial, industrial, and multi-residential buildings. He has experience in structural design of equipment platforms, equipment foundations, sign bases, conveyor support systems, retaining walls, and snowmobile and pedestrian trail bridges.


He also has civil engineering experience in land development site plans, stormwater management, and sewer and water design.


Bob received a Bachelor of Science in Civil Engineering with a Structural Engineering emphasis from Michigan Technological University in 1983. He is currently licensed as a Professional Engineer in Wisconsin, Michigan, North Dakota, Indiana, North Carolina, and South Carolina.

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Robert (Rob) J. Harris
Professional Land Surveyor

Rob has over 40 years of experience in land surveying in the State of Wisconsin, primarily in the Fox Valley. Following his education at UW-Fox Valley and UW-Stevens Point, he became registered as a Land Surveyor in 1988.


Rob has served on several committees and is a Past-President of the Wisconsin Society of Land Surveyors and its Northeast Chapter.


In his free time, Rob enjoys golf, water sports, winter sports, and cheering on the Packers, Brewers, Bucks, Badgers, and Golden Eagles.

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Calvin L. Tollefson 
Professional Engineer

As of 2018, Calvin has 35 years of experience in civil engineering with 28 years of consulting engineering experience. Areas of specialty are stormwater management, erosion control, site plan design, and drainage/grading plans. Calvin tries to make the maddening process of municipal and DNR permitting easier for our clients.


Calvin graduated from Michigan Technological University with a Bachelor of Science degree. He received his professional engineering license in 1990 with the State of Michigan and in 1994 with the State of Wisconsin.

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Keith Walenski
Professional Land Surveyor

Keith, with 31 years of experience as a land surveyor, has been employed at Harris & Associates, Inc. for 29 years. After receiving his Associate's Degree from Northeast Wisconsin Technical College, Keith became registered as a Professional Land Surveyor in 1995.


Keith is a member of the Wisconsin Society of Land Surveyors and its Northeast Chapter.


In his free time, Keith enjoys hunting, fishing, and taxidermy.

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