Our Story

After reading about the development of the Kolbe A™ Index in 1990, Mari Martin founded Performance Strategies Group (PSG) to help industry leaders, family businesses and nonprofits build strong teams and remarkable workplace cultures.

As we grew, a personal passion surfaced to work with Christian businesses, ministries, and church staff.  As a result of that work, PSG came to stand not only for Performance Strategies Group, but also for People Serving God.

Headquartered in Holland, MI but working with businesses both locally and nationally, we have helped over 26,000 employees grow more engaged, connected, and successful in their work.

Mari Martin

Mari Martin

Founding Partner, Kolbe Certified™ Master Team Consultant

Mari D. Martin is the founding partner of Performance Strategies Group, Inc. (PSG). In 1990 she became one of the first consultants worldwide to be trained as a Kolbe Certified™ Consultant. She is also among a few select consultants who have been named as a Kolbe Certified™ Master Team Consultant.

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Mari’s background is in communications where she spent nine years working in media sales for newspaper, radio and magazine groups. However, she found her passion when she transferred her communication background into corporate training and leadership development 28 years ago.

Mari is the first recipient of the Mari Martin Award presented annually by the Lakeshore Alliance Against Domestic and Sexual Violence, as well as the first recipient of the Kolbe Professional Award presented by Kolbe Corp in 2013. She has served on several non-profit and faith-based Boards of Directors in the Holland, MI community where she has lived since 1983.

Mari has a passion for long distance running and has trained for and run eight marathons since 2006. She enjoys spending time with her retired husband Chris, who brags about his improved golf game. They have two adult sons and a daughter-in-law living in Chicago and welcome all opportunities to spend time with their only granddaughter.

Monica Gravenhof

Monica Gravenhof

Client Services Manager, Kolbe Certified™ Consultant

Monica M. Gravenhof is a Kolbe Certified™ Consultant and is the Client Services Manager for PSG. Monica has 29 years of Customer Service experience, and she has worked with PSG for over 10 years. She enjoys working with clients using the Kolbe Team Management System and thinks it is a great tool to enhance Communication in business as well as your personal life.

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Monica received her Bachelor’s Degree in Communication from Dordt University in Sioux Center, Iowa. Monica and her husband, Brent, reside in Zeeland, MI with their two children, Ryder and Renna.

Brent (9523) and Monica have a heart for missions and enjoy various activities with their family. Their favorites are watching Ryder play football and basketball and Renna playing soccer and volleyball. 

In the summer they can often be found outside by their pond, checking the chickens for eggs, running the dog or traveling to see family from out of state.

Monica likes to say—“If everyone understood Kolbe, the world would be a better place!”  Know your MO, hers is 5981.