Administrative Team

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

Brian Dieter, FACHE, President/Chief Executive Officer
email: Brian Dieter
Brian DieterBrian Dieter has served as President and CEO for Mary Greeley Medical Center since July 2008. Prior to that, he was vice president and chief financial officer at MGMC for nearly nine years. Before joining MGMC, he spent 10 years at Ancilla Systems Inc. at three affiliated healthcare organizations in financial leadership positions. Dieter received his Bachelor of Science degree in Business from Indiana University in 1985 and his Master of Science degree in Administration from the University of Notre Dame in 1998. He is a Fellow in the American College of Healthcare Executives and board chair for the Iowa Hospital Education and Research Foundation (IHERF). He is a current member of the Rotary Club of Ames and a board member and vice chair for the Ames Economic Development Commission. He previously served as past board president and past campaign chair for United Way of Story County as well as past president of the Ames Morning Rotary Club. Dieter also served as a past chair for the Ames Chamber of Commerce.

Neal Loes, RN, Vice President/Chief Nursing Executive
email: Neal Loes
Neal LoesNeal Loes has served as a Vice President of the Medical Center since 1993. His prior positions include: Director of Quality Management of the Medical Center from 1989 to 1993; Advanced Product Analyst, 3M HIS, Salt Lake City, Utah from 1986 to 1989; Medicare Services Manager, Iowa Foundation for Medical Care, Des Moines, Iowa from 1984 to 1986, and Staff Nurse at the Medical Center from 1981 to 1984. He received his Associate degree in Nursing from Rochester Community College in 1980, his Bachelor of Science degree in Business Administration from the University of Phoenix in 1993, his Master of Science of Healthcare Administration degree from Des Moines University in 2000 and his Bachelor of Science in Nursing from Regis University, Denver, CO in 2006. Loes is a member of the American Organization of Nurse Executives, Iowa Organization of Nurse Leaders and the American College of Healthcare Executives. He has served in leadership roles in AONE, IONL and the Ames Chamber of Commerce Board of Directors. He is a member of the Des Moines Area Community College Nursing Advisory Board, the Grand View College Nursing Advisory Board, the Healthiest Ames Initiative Board, and is an examiner for the Iowa Recognition for Performance Excellence Program. In addition, Loes serves on the Iowa Hospital Association’s Council on Representation and Advocacy.

Amber Deardorff, BSN, RN, MPA, Vice President/Clinical and Support Services
email: Amber Deardorff
Amber DeardorffAmber Deardorff has served as a Vice President of the Medical Center since May 2017. 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/Quality Improvement Officer
email: Karen Kiel Rosser
Karen Kiel-RosserKaren Kiel Rosser serves as the Vice President & Quality Improvement 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 BotineGary 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.

Board of Trustees

Board of Trustees

Mary Greeley Medical Center Board of Trustees

Pam White, Brad Heemstra, Mary Kitchell,
Ken McCuskey (Secretary/Treasurer) and
Sarah Buck (chair)

As a city owned hospital, Mary Greeley Medical Center is governed by a board of five elected medical center trustees.The day to day operations of the medical center are carried out under the leadership of our administrative team.

Sarah Buck, Chair
email: Sarah Buck
Term Expires: 2019

Ken McCuskey, Secretary/Treasurer
email: Ken McCuskey
Term Expires: 2019

Brad Heemstra
email: Brad Heemstra
Term Expires: 2019

Pam White
email: Pam White
Term Expires: 2017

Mary Kitchell
email: Mary Kitchell
Term Expires: 2017

Medical Staff Leadership

The administrative oversight of our providers is carried out by our medical staff leadership group.

James Partridge, M.D.
Chief of Staff

Ann Gessner, D.O.
Chief of Staff Elect

Perry Rathe, M.D.
Secretary