Steve Mackin is Mercy's incoming president and chief executive

November 1, 2021

Mercy health system of Chesterfield, Missouri, has named Steve Mackin president and chief executive, effective April 1. Mercy also named him to its board of directors. He will succeed Lynn Britton, who has headed Mercy for 13 years.


Mackin joined Mercy in 2017 as a senior executive for business line development, focusing on cancer services and was soon named president of Mercy Hospital St. Louis and joined the senior leadership team of Mercy. Most recently he has worked as executive vice president, hospital president and president of Mercy's east region.

Prior to his tenure at Mercy, Mackin worked at Cancer Treatment Centers of America for nearly 19 years, beginning as a management fellow and progressing to executive positions including chief operating officer and interim president.

According to a Mercy press release on the leadership transition, over the next six months, Mackin will work alongside Britton until he assumes the helm. They will visit communities Mercy serves and listen to the input of co-workers, local boards and community members. The system has more than 40 acute care, managed and specialty hospitals as well as a network of other facilities throughout four Midwestern states.

When Mackin assumes leadership of the system, Britton will become executive chair of Mercy's board of directors. Current chair David Pratt will remain on the board after the leadership transition is complete.

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