Insights

Employee-owned advantage ISG is a 100 percent employee-owned multidisciplinary architecture and planning firm with a long-standing history. This ownership structure can be leveraged to position ISG as a stable, collaborative partner with aligned incentives, offering a value proposition focused on long-term client relationships and consistent service quality.

Large-scale capacity With 1001-5000 employees and revenue in the broad $1B-$10B range, ISG demonstrates substantial delivery capacity and resources. This suggests opportunities for large, complex projects, multi-market engagements, and scalable teams that can handle high-volume workloads for enterprise clients.

Tech-forward toolkit ISG employs a modern tech stack including Power BI, AWS, Azure, GitHub, and collaboration tools like Microsoft 365 and Teams. This indicates readiness for digital transformation projects, data-driven design, BIM/data analytics, and cloud-based collaboration enhancements.

Diverse markets As a multidisciplinary firm serving numerous markets with a broad knowledge base and collaborative approach, ISG presents opportunities to cross-sell integrated services across different sectors and geographies, aligning with clients pursuing holistic, coordinated architecture and planning solutions.

Strategic partnership signals ISG’s legacy of client trust, community relations, and a strong emphasis on relationships suggests success in advisory, master planning, and stakeholder engagement roles. This opens doors for strategic partnerships, long-term programs, and repeat engagements in both public and private sectors.

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@isginc.comJohn.Doe@isginc.com
91%
First@isginc.comJohn@isginc.com
7%
Last@isginc.comDoe@isginc.com
2%
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%

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 OISGX.

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 October 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 October 2026, ISG has approximately 1.4K 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@isginc.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
OISGX
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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