isginc.com Information

ISG has a rich history that extends more than 50 years, of building trusting relationships with clients, stakeholders, and the community. As a multidisciplinary 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.

Website	https://www.isginc.com/
Revenue	$52.3 million
Funding	$5 million
Employees	1,326 (627 on RocketReach)
Founded	1973
Address	115 E Hickory Street Suite 300, Mankato, Minnesota 56001, US
Phone	+1 952-426-0699
Industry	Architecture and Planning, Architecture, Engineering & Design, Construction
Keywords	Consulting Services, Client Relationships, Project Management, Strategic Planning, Stakeholder Engagement, Business Solutions, Employee Ownership, Community Involvement, Business Transformation, Multidisciplinary Team, Market Analysis, Risk Management, Organizational Development, Financial Services, Operations Management, Engineering Solutions, Technology Consulting, Environmental Consulting, Supply Chain Management, Sustainability Initiatives
Competitors	Deloitte, PwC, Accenture, Capgemini, KPMG In Pakistan, McKinsey & Company, Gartner, Boston Consulting Group (BCG), Bain & Company, Forrester +40 more (view full list)
SIC	SIC Code 87 Companies, SIC Code 871 Companies
NAICS	NAICS Code 54133 Companies, NAICS Code 54 Companies, NAICS Code 541 Companies, NAICS Code 5413 Companies

isginc.com Questions

What is the annual revenue of isginc.com?

The isginc.com annual revenue was $52.3 million in 2026.

Who is the CFO of isginc.com?

Alec Pfeffer is the CFO of isginc.com.

How many people are employed at isginc.com?

627 people are employed at isginc.com.

Where is isginc.com based?

isginc.com is based in Mankato, Minnesota.

What is the NAICS code for isginc.com?

The NAICS codes for isginc.com are [54133, 54, 541, 5413].

What is the SIC code for isginc.com?

The SIC codes for isginc.com are [87, 871].

Top isginc.com Employees

Alec Pfeffer

Chief Financial Officer at isginc.com

Mankato, MN, US
2
- gmail.com
- isginc.com
4
- +1 605-881-XXXX
- +1 507-625-XXXX
- +1 612-303-XXXX
- +1 507-381-XXXX
Lynn Bruns

Chief Executive Officer at isginc.com

Onalaska, WI, US
1
- isginc.com
5+
- +1 636-244-XXXX
- +1 718-405-XXXX
- +1 507-330-XXXX
- +1 507-429-XXXX
- +1 507-664-XXXX
- +1 605-688-XXXX
David Doxtad

President at isginc.com

Sioux Falls, SD, US
1
- isginc.com
2
- +1 712-732-XXXX
- +1 712-210-XXXX
Mike Nelson

Vice President - MEP Leader at isginc.com

Mankato, MN, US
2
- gmail.com
- isginc.com
4
- +1 407-580-XXXX
- +1 763-566-XXXX
- +1 763-528-XXXX
- +1 507-331-XXXX
Eric Eby

Vice President, Information Technology at isginc.com

Mankato, MN, US
2
- gmail.com
- isginc.com
2
- +1 563-340-XXXX
- +1 507-387-XXXX
Amanda Prosser

Employee Owner, Vice President + Sports and Recreation Business Unit Leader at isginc.com

Minneapolis, MN, US
2
- gmail.com
- isginc.com
5
- +1 515-520-XXXX
- +1 701-984-XXXX
- +1 952-486-XXXX
- +1 815-262-XXXX
- +1 952-426-XXXX
Frank Johnson Jr.

Vice President, Energy at isginc.com

Westlake, OH, US
4
- gmail.com
- sbcglobal.net
- hotmail.com
- isginc.com
5+
- +1 440-220-XXXX
- +1 330-330-XXXX
- +1 513-550-XXXX
- +1 513-706-XXXX
- +1 440-635-XXXX
- +1 513-706-XXXX
Derek Johnson

Vice President, Public Works Business Unit Leader at isginc.com

Des Moines, IA, US
3
- gmail.com
- isginc.com
- iastate.edu
4
- +1 773-424-XXXX
- +1 515-330-XXXX
- +1 515-689-XXXX
- +1 712-732-XXXX
Brian Gjerde

Vice President at isginc.com

Faribault, MN, US
2
- gmail.com
- isginc.com
2
- +1 952-426-XXXX
- +1 612-730-XXXX
Abby Gram

Vice President, Marketing at isginc.com

Prior Lake, MN, US
1
- isginc.com
2
- +1 213-479-XXXX
- +1 612-202-XXXX