Insights

Large enterprise ISG is a mid to large-cap architecture and planning firm with 1001-5000 employees and revenue in the 1B–10B range, indicating a mature organization with substantial project scale and potential for enterprise-level service expansions.

Employee ownership The company is 100 percent employee-owned, which can be leveraged to position services that enhance internal collaboration, knowledge management, and firm-wide efficiency improvements that appeal to its governance and cultural priorities.

Tech-enabled ISG utilizes a modern tech stack including Power BI, AWS, Azure, Microsoft 365, Teams, and GitHub, suggesting opportunities for advanced data analytics, cloud migrations, BIM data integration, and collaborative digital transformation engagements.

Discipline integration As a multidisciplinary firm with strong collaboration across disciplines, there is potential to offer integrated design-build, BIM coordination, and cross-disciplinary project delivery services that align with their broad knowledge base.

Growth readiness With a history of 50+ years and ongoing market activity, ISG appears positioned for expansion in new markets or client segments; a targeted outreach focusing on scalable programs, such as repeatable project delivery systems or sustainability-focused initiatives, could drive renewed growth.

Similar companies to ISG

ISG Tech Stack

ISG uses 8 technology products and services including Power BI, Amazon Web Services, GitHub, and more. Explore ISG's tech stack below.

ISG's Email Address Formats

ISG uses at least 6 email formats:
ISG Email FormatsExamplePercentage
First.Last@is-grp.comJohn.Doe@is-grp.com
96%
Last@is-grp.comDoe@is-grp.com
3%
Last_First@is-grp.comDoe_John@is-grp.com
1%
First.Last@isginc.comJohn.Doe@isginc.com
91%
First@isginc.comJohn@isginc.com
7%
Last@isginc.comDoe@isginc.com
2%

Frequently Asked Questions

What is ISG's phone number?

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You can contact ISG's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is ISG's stock symbol?

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ISG is a publicly traded company; the company's stock symbol is CISGX.

What is ISG's official website and social media links?

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ISG's official website is isginc.com and has social profiles on LinkedIn.

How much revenue does ISG generate?

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As of August 2026, ISG's annual revenue is estimated to be $1B - $10B.

What is ISG's NAICS code?

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ISG's NAICS code is 54131 - Architectural Services.

How many employees does ISG have currently?

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As of August 2026, ISG has approximately 1.3K employees across 5 continents, including North America, Europe and Asia. Key team members include Chief Executive Officer: L. B., Executive Vice President: A. B. and Survey Party Chief: D. P. Explore ISG's employee directory with LeadIQ.

What industry does ISG belong to?

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ISG operates in the Architecture and Planning industry.

What technology does ISG use?

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ISG's tech stack includes Power BI, Amazon Web Services, GitHub, Squarespace, Microsoft 365, Microsoft Active Directory, Microsoft Azure and Microsoft Teams.

What is ISG's email format?

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ISG's email format typically follows the pattern of First.Last@is-grp.com. Find more ISG email formats with LeadIQ.

When was ISG founded?

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ISG was founded in 1973.
ISG logo

ISG

Architecture and PlanningMinnesota, United States1001-5000 Employees

ISG is a multidisciplinary architecture and planning firm based in Mankato, Minnesota, with a history spanning more than five decades. The company is 100 percent employee-owned and focuses on building trusting relationships with clients, stakeholders, and the community, while delivering diverse knowledge and broad perspectives through collaboration across disciplines. Serving multiple markets, ISG provides creative problem-solving grounded in a collaborative approach, aiming to meet client needs with a comprehensive understanding of design and planning considerations.

Established in the architecture and planning industry, ISG emphasizes an in-house, collaborative model that leverages varied disciplines to support project outcomes for its clients. The firm operates from its headquarters in Mankato and positions itself as a locally rooted firm with a broad, multi-market reach, reflecting its long-standing presence and ownership structure.

Section iconCompany Overview

Phone number
Website
isginc.com
Stock Symbol
CISGX
NAICS Code
54131 - Architectural Services
Founded
1973
Employees
1001-5000

Section iconFunding & Financials

  • $1B - $10B

    ISG's revenue is estimated to be in the range of $1B - $10B

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