Tandem HR is a full service HR company offering outsourced HR or Professional Employer Organization (PEO) solutions and brokerage services to businesses of all sizes since 1998.

As the largest privately-held Midwest PEO and Chicago PEO with offices nationwide, we pride ourselves on our ability to provide high-touch HR solutions that increase shareholder profitability. Our solutions support employers with first-in-class employee-focused HR solutions for all employees – regardless of where they reside in the U.S. Tandem HR offers a variety of options and flexible human resource solutions to fit your business needs.  Small and mid-sized businesses co employ with Tandem HR to bring the most effective HR solutions that will boost productivity and, ultimately, grow their bottom line. Additionally, businesses of all sizes will benefit from a strategic benefits partner or an Employee Assistance Program (EAP).

One thing that sets Tandem HR apart from the competition is our expert service team members. Our colleagues are knowledgeable, experienced, and dedicated to providing professional and friendly service to you and all of your employees. Our high-touch business model gives you direct access to your service team. These experts conduct employee onboarding, benefits orientations, employment law compliance checks, and much more. Or, in the case of the EAP, offer professional and confidential solutions and resources to your employees at no cost. Each and every team member has our company values at the forefront of their mind as they service client accounts.

How did it all begin?

Tandem HR was founded in 1998 by Bruce Leon, a Chicago area benefits consultant and insurance agent, who also founded a full-service insurance agency called Benefits Solutions Group in 1997. Bruce immediately identified a unique need among small and mid-sized businesses for outsourced human resource assistance beyond benefits. The market was missing a high-touch customer-centric business model. In 1998, Bruce officially established a PEO called Tandem Professional Employer Services.

With two companies working in tandem, business began growing rapidly. Initial growth was attributed to word-of-mouth referrals from satisfied clients and business partners. In 2008, Tandem PES changed its name to Tandem HR to create more understanding among prospective clients about the services provided by the PEO. In 2018, the company began to expand its physical footprint adding other locations in the Midwest.

In early 2020, Shore Capital Partners invested in Tandem HR and assisted with several PEO acquisitions. Tandem HR currently boasts a staff of over 170 employees, servicing hundreds of thousands of worksite employees nationally with benefits, human resources, and EAP needs.


To be the preferred partner for HR solutions
We deliver HR solutions so our clients can deliver business results
We commit to our clients.
We work together.
We understand.
We think critically.



2400 Wolf Road
Westchester, IL 60154
(630) 928-0510
300 Hunter Avenue, Suite 200
St. Louis, MO 63124
(314) 530-5466
1010 E. Washington Avenue, Suite 314
Madison, WI 53703
(608) 258-5525
5605 North MacArthur Boulevard, 10th Floor
Irving, TX 75038

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Learn more today!

We want to be the first-choice trusted advisor for organizations looking to build an exceptional workplace. Is that you? Learn more about us, why we believe we provide the best solutions, what our clients think about our services, and what Tandem HR does in the community.

For more information call Tandem HR today at (630) 928-0510.

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