Insights

Established Reputation Olsen Thielen & Co., Ltd. is a well-established accounting and consulting firm with over 95 years of experience, serving a diverse client base in the Upper Midwest. Their long-standing presence suggests a strong local market position and potential for expansion into new regional markets.

Comprehensive Service Portfolio The company offers a broad range of services including valuations, human resources, employee benefits, estate planning, and forensic accounting, indicating opportunities to cross-sell additional consulting services to existing clients seeking integrated financial solutions.

Technology-Enabled Solutions Utilizing cloud-based and traditional accounting tools such as QuickBooks, Office 365, and integrated digital platforms, Olsen Thielen demonstrates a modern approach, which presents upsell opportunities around advanced financial software or digital transformation consulting.

Financial Strength With revenues estimated between $100 million and $250 million, Olsen Thielen has a solid financial foundation, enabling strategic investments in new service areas or technological upgrades, making them a potential partner for high-value collaborative initiatives.

Industry Focus & Niche Markets The firm’s specialization in industries like telecommunications, manufacturing, real estate, and non-profits creates tailored opportunities to introduce industry-specific solutions, advanced compliance services, or sector-focused advisory offerings to deepen client relationships.

Similar companies to Olsen Thielen and Co., Ltd.

Olsen Thielen and Co., Ltd. Tech Stack

Olsen Thielen and Co., Ltd. uses 8 technology products and services including QuickBooks, Google Fonts API, Font Awesome, and more. Explore Olsen Thielen and Co., Ltd.'s tech stack below.

  • QuickBooks
    Accounting And Finance
  • Google Fonts API
    Font Scripts
  • Font Awesome
    Font Scripts
  • ADP
    Human Resource Management System
  • Slider Revolution
    Miscellaneous
  • Office 365
    Office Suites
  • Google
    Search Engines
  • jQuery Waypoints
    Web Tools And Plugins

Olsen Thielen and Co., Ltd.'s Email Address Formats

Olsen Thielen and Co., Ltd. uses at least 1 format(s):
Olsen Thielen and Co., Ltd. Email FormatsExamplePercentage
FLast@otcpas.comJDoe@otcpas.com
90%
FirstLast@otcpas.comJohnDoe@otcpas.com
7%
First.Last@otcpas.comJohn.Doe@otcpas.com
2%
Last@otcpas.comDoe@otcpas.com
1%

Frequently Asked Questions

Where is Olsen Thielen and Co., Ltd.'s headquarters located?

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Olsen Thielen and Co., Ltd.'s main headquarters is located at 2675 Long Lake Road St. Paul, Minnesota 55113 United States. The company has employees across 2 continents, including North AmericaEurope.

What is Olsen Thielen and Co., Ltd.'s phone number?

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You can contact Olsen Thielen and Co., Ltd.'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 Olsen Thielen and Co., Ltd.'s official website and social media links?

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Olsen Thielen and Co., Ltd.'s official website is otcpas.com and has social profiles on LinkedIn.

What is Olsen Thielen and Co., Ltd.'s SIC code NAICS code?

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Olsen Thielen and Co., Ltd.'s SIC code is 8748 - Business Consulting Services, Not Elsewhere Classified NAICS code is 5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services.

How many employees does Olsen Thielen and Co., Ltd. have currently?

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As of March 2026, Olsen Thielen and Co., Ltd. has approximately 135 employees across 2 continents, including North AmericaEurope. Key team members include Chief Executive Officer: C. B.Chief People Officer: V. F.Chief Operating Officer: J. W.. Explore Olsen Thielen and Co., Ltd.'s employee directory with LeadIQ.

What industry does Olsen Thielen and Co., Ltd. belong to?

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Olsen Thielen and Co., Ltd. operates in the Accounting industry.

What technology does Olsen Thielen and Co., Ltd. use?

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Olsen Thielen and Co., Ltd.'s tech stack includes QuickBooksGoogle Fonts APIFont AwesomeADPSlider RevolutionOffice 365GooglejQuery Waypoints.

What is Olsen Thielen and Co., Ltd.'s email format?

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Olsen Thielen and Co., Ltd.'s email format typically follows the pattern of FLast@otcpas.com. Find more Olsen Thielen and Co., Ltd. email formats with LeadIQ.

When was Olsen Thielen and Co., Ltd. founded?

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Olsen Thielen and Co., Ltd. was founded in 1921.

Olsen Thielen and Co., Ltd.

AccountingMinnesota, United States51-200 Employees

Olsen Thielen & Co., Ltd. is a full service accounting and consulting firm, and a “Top 25” Twin Cities firm. We provide high level service and strategic direction to businesses through our traditional accounting and tax services, as well as non-traditional services like:

Valuations
Human Resources consulting
Employee Benefit consulting
Back-office Cloud Accounting Solutions
Estate, gift and succession planning
Fraud and forensic accounting

We offer services that fit the unique needs of many organizations and industries.

Telecommunications
Professional Services
Manufacturing and Distribution
Not-for-profit organizations
Utilities
Real Estate and Construction

Our focus is on helping owners, leaders and management teams fulfill their organization’s goals. We offer a rare combination of experience, specialized skills and principles, and are committed to deliver outstanding service and value to your business.  This philosophy has made Olsen Thielen a trusted adviser to business owners in the Upper Midwest for over 95 years.

Section iconCompany Overview

Headquarters
2675 Long Lake Road St. Paul, Minnesota 55113 United States
Phone number
Website
otcpas.com
SIC Code
8748 - Business Consulting Services, Not Elsewhere Classified
NAICS Code
5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services
Founded
1921
Employees
51-200

Section iconFunding & Financials

  • $100M$250M

    Olsen Thielen and Co., Ltd.'s revenue is estimated to be in the range of $100M$250M

Section iconFunding & Financials

  • $100M$250M

    Olsen Thielen and Co., Ltd.'s revenue is estimated to be in the range of $100M$250M

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