Berntsen International Inc. is a manufacturer and supplier of survey markers, survey monuments, utility markers and related accessories. Established in 1972, it has a product line of more than 1,000 markers, monuments and identification products for surveying, utilities, construction, and parks and recreation. Located in Madison, Wis., the company specializes in markers custom made for specific projects. Governments throughout the world, infrastructure specialists for transportation systems, boundary mapping, construction references and seismic monitoring networks employ its markers. Some of its clients include Alliant Energy, Google, Westpoint Military Academy, Royal Canadian Mounted Police and Institute of Tropical Forestry.