Board of Directors

Maryann McMahon, OP, President

Sister Maryann McMahon is president of the Racine Dominicans. A nurse practitioner with MSN and FNP degrees from the University of Wisconsin-Oshkosh, she has served in multiple capacities. Before her election as president of her community, she was the Executive Director of HOPES Center, serving mental health and social service needs of Racine’s poor and homeless.

Agnes Johnson, OP, Vice President

Sister Agnes Johnson just ended her term as vice-president of the Racine Dominicans. She holds a B.S. in medical technology from Dominican College, Racine, and an RN from Deaconess Hospital in Milwaukee. Before being elected to leadership in her community, she was an RN case manager for Home Health United in Portage, a nonprofit health care agency.

Shari Geertsen, Secretary/Treasurer

Shari Geertsen has been the Director of Finance for the Racine Dominicans since 2002. She holds a B.S. degree in Business Administration and Accounting from the University of Wisconsin-Parkside. She also serves on several non-profit boards and is a trustee for several congregations. Her prior work includes Controller and Accounting Manager in for-profit corporations for more than 10 years.

John Albert

John Albert graduated from Marquette Law School in 1971 and started a successful Racine firm where he practiced for many years. He helped establish and lead the Downtown Racine Development Corporation, the Alliance for Mentally Ill, Societies Assets, Inc., and others. He recently served as Trustee on the Board of the College of St. Benedict in Minnesota. He has had broad experience in developing and participating in board governance with several non-profit organizations as well as serving as Board Chairman of a privately held manufacturing firm in Illinois.

Joanne Armatowski, SSND

Sister Joanne Armatowski is a School Sister of Notre Dame who presently serves as administrator of the SSND retirement facility at Notre Dame of Elm Grove. She holds a MA in public service with a focus on health care from Marquette University and a MA as a reading specialist from Cardinal Stritch University. Before serving as administrator for the last three years, she was in leadership in her community for six years.

Bernie Flores, NP

"My goal as a nurse practitioner is to partner with my patients to achieve their highest level of wellness possible. Together through teaching, guidance, and current evidence-based medical information, we can achieve an improved level of health for each patient." Bernie Flores has a Bachelor of Science in Nursing degree from Marian College in Fond du Lac, Wisconsin, and a Master of Science in Nursing (Geriatric Nurse Practitioner) from Condordia University in Mequon, Wisconsin.

Gary Mohn

information coming soon

Greg Anderegg

information coming soon



Susan Boland, Executive Director

Susan Boland has been the Executive Director for Siena on the Lake since October 2018. She holds a BS in Nursing from St. Xavier University and an MS in Nursing from Rush University. Susan also serves on several non- profit boards within the community. Prior to joining Siena on the Lake, Susan served in multiple leadership roles for 23 years within Wheaton Franciscan Healthcare – All Saints and retired as the President of Ascension – All Saints in 2017.

Alex Ostrov

information coming soon