ISG has a rich history that extends more than 50 years, of building trusting relationships with clients, stakeholders, and the community. As a multi-disciplinary firm that is 100 percent owned by employees, ISG serves numerous markets and fosters strong collaboration between all disciplines providing clients a diverse knowledge base, high level of creativity, and broad perspective.
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ISG Questions
The ISG annual revenue was $52.3 million in 2026.
Chad Surprenant is the Chief Strategy Officer | Board Chair of ISG.
15 people are employed at ISG.
ISG is based in Mankato, Minnesota.
The NAICS codes for ISG are [54, 5413, 54133, 541].
The SIC codes for ISG are [871, 87].
Top ISG Employees
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Chad Surprenant
Chief Strategy Officer | Board Chair at ISG
Roswell, GA, US22 -
Chris Adams
Project Manager at ISG
Mankato, MN, US23 -
Spencer Pech
Civil Engineer at ISG
Columbus, OH, US1 -
Guadalupe Munoz Rocha
Graduate Engineer at ISG
Storm Lake, IA, US -
Ricardo Avitabile
Senior Construction Manager at ISG
Chelmsford, GB -
Chantal Nack
Graduate Structural Engineer at ISG
Minneapolis, MN, US22 -
Justin Heim
Civil Engineer at ISG
Sioux Falls, SD, US45+ -
Julie Blackburn
Water Business Unit Leader at ISG
Saint Paul, MN, US22 -
Diana Welter
Support Specialist at ISG
Saint Paul, MN, US35 -
Becky Guenther
Civil Engineer at ISG
Saint Paul, MN, US22
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