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About Us


Professional Engineering, LLC is a civil engineering firm that has always been passionate about the success of our clients and community. We understand that projects must move quickly through planning approvals, design, and construction to be competitive. Our company is a Woman-Owned Disadvantage Business Enterprise (WDBE) and offers design services which include site planning, storm water management, grading, utility, erosion control, land surveying and construction services. Professional Engineering, LLC is committed to sustainable building and development practices. We have Leadership in Energy and Environmental Design (LEED) Accredited professionals on staff to help those clients who wish to complete the LEED certification process.

Roxanne Johnson, P.E., founded Professional Engineering, LLC in 2007. She earned her B.S. degree in Civil Engineering from the University of Wisconsin – Madison in 1995. Her career began at the U.S. Geological Survey – Water Resources Division in 1991. Her previous work experience also includes working as a project engineer for 12 years at two local civil engineering firms. Roxanne has been a licensed professional engineer since March of 2000. She has served on the City of Madison Board of Public Works and the Wisconsin Department of Commerce Pool Code Council. Ms. Johnsons’ expertise is in planning and design of land development projects. She completed the civil engineering portions of projects in numerous local municipalities including: Madison, Sun Prairie, Verona, Fitchburg, Middleton, Mount Horeb, Horicon, Menomonee Falls, Arena, Waunakee, Edgerton, Prairie du Sac, Lake Delton, La Crosse, Oshkosh, Platteville, Whitewater, Deerfield, Town of Dunn, Town of Arlington, Blue Mounds, and Pardeeville.