Leadership

The day to day operations of the medical center are carried out under the leadership of our administrative team.

Amber Deardorff, BSN, RN, MPA, President/Chief Executive Officer

email: Amber Deardorff
Amber Deardorff became President and CEO of Mary Greeley in August 2025. She joined the administrative team in 2017, serving as vice president for clinical and support services. In 2023, she was appointed vice president for, chief operating officer and chief nursing officer. Prior to this, she had several positions at Mary Greeley, including Director of Clinical Application Systems from 2012 to 2017; Clinical Applications Manager from 2009 to 2012; Clinical Information Coordinator from 2006 to 2012; and Registered Nurse in Intensive Cardiac Care Unit from 2004 to 2006. A long time Ames resident and Ames High School graduate, Deardorff obtained her Bachelor of Science degree in Exercise and Sports Science from Iowa State University in 2002. She received a Bachelor of Science degree in Nursing from Grand View College in 2004. In 2012, Deardorff obtained her Master of Public Administration degree from Drake University. She is a 2016 Iowa Hospital Association Hospital Executive Academy graduate, as well as an Iowa Hospital Association Health Care Leadership Series graduate. She has been active in a variety of community organizations in Ames and Story County, including Friendship Ark Homes, the United Way of Story County, and the Ames Community Preschool Center.

Karen Kiel Rosser, Vice President/Chief Quality Officer & Chief Strategy Officer

email: Karen Kiel Rosser
Karen Kiel Rosser serves as the Vice President, Chief Quality Officer and Chief Strategy Officer for Mary Greeley Medical Center. Before joining Mary Greeley Medical Center, she was the Vice President of Performance Excellence and Managed Care at Agnesian HealthCare, an integrated health care delivery system in Fond du Lac, WI. In this role, Kiel Rosser spearheaded the development and implementation of a system-wide framework for performance excellence utilizing criteria from the Malcolm Baldrige National Quality Award Program as well as the tools of lean and six sigma. Her positions prior to Agnesian HealthCare included Network Development Director at Humana Health Plan in Milwaukee, WI, and Ambulatory Clinic Manager for Aurora Health Care in Milwaukee, WI. She holds a Master’s Degree in Health Care Administration from the University of Minnesota and a Bachelor’s degree in Communications and Public Relations from the University of Wisconsin, Whitewater. Kiel Rosser is a certified lean six sigma green belt, an examiner, coach and judge for the Iowa Recognition for Performance Excellence Program, and is on the Board of Examiners for the Baldrige National Quality Award Program. Additionally, she is a member of the Ames Morning Rotary Club, a board member for United Way of Story County, and a participant in Leadership Ames (class XXIV) program.

Gary Botine, Vice President/Chief Financial Officer

email: Gary Botine
Gary Botine joined the Medical Center in March 2014 as Vice President/Chief Financial Officer. Prior to that, Botine served as vice president for human resources at Danfoss Power Solutions. In that position he was responsible for human resources functions for an organization of 6,500 employees. Botine joined Sauer-Danfoss (now Danfoss Power Solutions) in 1993 and served in a number of leadership positions with the global manufacturing company in the areas of human resources, finance, manufacturing, and information technology. Botine began his career in public accounting with Deloitte & Touche and Grant Thornton. He is a certified public accountant. He received his Bachelor of Arts degree in Accounting from University of Northern Iowa in 1986. Botine has been active in a variety of community organizations in Ames and Story County, including chairing the 2011 United Way of Story County campaign, serving on the Ames Public Library Board of Directors, Ames Noon Rotary Club Board of Directors, the Center for Creative Justice Board of Directors, President of the Bethesda Lutheran Church Council, an examiner for the Iowa Recognition for Performance Excellence Program, and the Ames Chamber of Commerce Board of Directors. Botine and his wife, Heather, also spearheaded a $300,000 capital campaign for the Ames Community School District. Botine currently serves on the Board of Directors of the Ames Convention and Visitors Bureau, chairs the Main Street Cultural District (MSCD) economic development committee and serves on the MSCD Board of Directors.

Amy Dagestad, MBA, MSN, RNC-OB, NE-BC, Vice President and Chief Nursing Officer

email: Amy Dagestad
Amy Dagestad was appointed Vice President and Chief Nursing Officer (CNO) at Mary Greeley Medical Center in September 2025. Dagestad joined Mary Greeley in 2015 as Director of Maternal Child Services. In 2023, she was appointed Executive Director of Inpatient Services. She is active with the Association of Women's Health, Obstetric and Neonatal Nurses (AWHONN), and was named an Emerging Leader by the organization in 2019. Prior to joining Mary Greeley, she worked in maternity services at UnityPoint Health Des Moines. Dagestad earned her BSN and MSN in nursing leadership from Allen College in Waterloo, and her MBA from the University of Maryland.

Penny Bellville, MS-HRD, SHRM-SCP, CCP, SPHR, Vice President and Chief Human Resource Officer

email: Penny Bellville
Penny Bellville was appointed Vice President and Chief Human Resource Officer in September 2025. Prior to this, Bellville served as Executive Director of Talent at Mary Greeley from 2023 to 2025, and as the medical center’s Director of Human Resources and Education from 2018 to 2023. She held human resource roles in financial services and commercial real estate, before joining Mary Greeley in 2014. She received her Bachelor of Business Administration degree from Iowa State University and her Master of Science-Human Resource Development degree from Villanova University. She is certified as a Senior Professional in Human Resources, a Certified Compensation Professional and a Society for Human Resource Management-Senior Certified Professional.