Mercy has announced the appointment of Brian Day as its new chief financial officer, recognizing more than 20 years of dedicated service and leadership within the organization. Day steps into the role after playing a central part in guiding Mercy’s financial stability and long-term planning across multiple states.
Announcing the decision, Steve Mackin, Mercy’s president and CEO, emphasized Day’s deep experience and strategic mindset. He noted that strong financial leadership is essential not only for organizational stability, but also for Mercy’s ability to continue delivering high-quality care to patients and communities well into the future.
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Day joined Mercy in 2002 and most recently served as senior vice president of financial operations and planning. In that capacity, he worked closely with local leadership teams, managed finances across Mercy’s multi-state footprint, and helped shape long-term investment strategies. His tenure includes oversight of major initiatives such as hospital acquisitions and integrations, financing programs, and more than $1 billion in public debt financing efforts that strengthened Mercy’s financial foundation and expanded its ability to serve patients.
Reflecting on his appointment, Day described the role as both an honor and a responsibility. He shared that his focus will remain on ensuring Mercy has the resources needed to provide excellent care, invest in communities, and expand access to high-quality, cost-effective healthcare for more people.
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Day holds a bachelor’s degree in business administration with a focus on finance from Truman State University and an MBA from Webster University. Beyond his professional responsibilities, he also serves on the board of Access Academies, a St. Louis–based nonprofit supporting education.
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The leadership transition follows the retirement of Cheryl Matejka, Mercy’s executive vice president and CFO, who concluded a 19-year career with the organization at the end of 2025. Matejka played a pivotal role in building Mercy’s financial strength and guiding the health system through significant challenges, including regulatory changes, the COVID-19 pandemic, and ongoing supply chain disruptions.
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