Insights

Expansive Service Portfolio Olsen Thielen & Co. offers a wide range of both traditional and innovative accounting services, including valuations, HR consulting, employee benefit planning, and forensic accounting. This diversified service offering indicates opportunities to cross-sell complementary solutions to existing clients across various industries.

Strong Market Position As a recognized top 25 firm in the Twin Cities with nearly 95 years of experience, Olsen Thielen has established a trusted reputation among business owners in the Upper Midwest. This emphasizes the company's stability and potential for expanding service engagement through enhanced relationships.

Technology Adoption The firm's use of advanced cloud and accounting technologies such as Sage Intacct and integration with major platforms like Adobe and Google suggests openness to digital transformation. There is an opportunity to introduce additional tech-driven solutions that improve efficiency or client engagement.

Client Industry Diversity Serving sectors like manufacturing, real estate, not-for-profits, utilities, and telecommunications, Olsen Thielen is positioned across multiple industries. Tailoring specialized financial and consulting services to these sectors could unlock new client segments or deepen existing relationships.

Growth Revenue Range With revenues estimated between $100 million and $250 million, Olsen Thielen is a sizeable firm with substantial market presence. Targeted technology, compliance, or strategic advisory solutions could help facilitate further growth, capturing more market share within their established client base.

Similar companies to Olsen Thielen & Co., Ltd.

Olsen Thielen & Co., Ltd. Tech Stack

Olsen Thielen & Co., Ltd. uses 8 technology products and services including Sage Intacct, Adobe, oEmbed, and more. Explore Olsen Thielen & Co., Ltd.'s tech stack below.

  • Sage Intacct
    Accounting
  • Adobe
    Audio, Video, Graphics
  • oEmbed
    Dev Tools
  • jQuery Migrate
    Javascript Libraries
  • Google
    Search Engines
  • HTTP/3
    Web & Portal Technology
  • Twitter
    Widgets
  • Facebook
    Widgets

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

Olsen Thielen & Co., Ltd. uses at least 1 format(s):
Olsen Thielen & 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

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

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

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

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

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Olsen Thielen & 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 & Co., Ltd. have currently?

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As of January 2026, Olsen Thielen & Co., Ltd. has approximately 127 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 & Co., Ltd.'s employee directory with LeadIQ.

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

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

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

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Olsen Thielen & Co., Ltd.'s tech stack includes Sage IntacctAdobeoEmbedjQuery MigrateGoogleHTTP/3TwitterFacebook.

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

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

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

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

Olsen Thielen & 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

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

Section iconFunding & Financials

  • $100M$250M

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

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