Professional Local PEO Outsourcing


Located in Denver, Colorado, InTANDEM HR is a Professional Employer Organization, or PEO, that offers small to mid-size employers a secure and professional full-service HR solution. We help clients keep the costs and time of HR administration down so they can increase profitability, lower their overhead, and attract and retain quality employees. Think of us as your “HR team down the street,” here for all your PEO outsourcing needs.


What We Believe In

InTANDEM HR continuously seeks to provide the best service, most advanced technology, and cost-effective delivery through our exceptional vendor partnerships and dedicated local staff. Our foundation was built on one simple idea: “Provide premiere, customized service that exceeds our clients’ expectations.”

Services and Benefits

Our client-centric approach to PEO outsourcing ensures we remain in sync with the specific needs of your business so we can efficiently navigate through any situation.
Better yet, when you call us, we answer the phone. Great customer service is important to us!

Our Partners

We’re Certified!

InTANDEM HR is one of the first PEOs in the country to be named a Certified Professional Employer Organization (CPEO) by the United States Internal Revenue Service. This certification gives business owners confidence that a PEO has met specific standards set by the U.S. government.

The IRS does not endorse any particular certified professional organization. For more information on certified professional employer organizations go to www.IRS.gov


InTANDEM Gives Back

Monica Denler, President and CEO, has made giving back a priority of InTANDEM HR’s mission. This is achieved through four key ways:

  1. InTANDEM HR works with non-profit clients at greatly reduced service fees.
  2. The InTANDEM HR Foundation was created to advocate for women, children, and healthcare organizations to make our community stronger.
  3. InTANDEM HR offers 2 service days per year for all internal staff to volunteer their time to any non-profit they find passion and connection with.
  4. Collectively, the InTANDEM HR staff has given hundreds of hours of their time to children’s causes, healthcare, women’s organizations, coaching, event fundraisers, and advocating to make our community better. The leadership of InTANDEM HR holds various board seats throughout the community, including a non-profit hospital and a children’s advocacy organization.