Key Staff
Dean Sienko, MD, MS
Health Officer/Medical Director
Phone: 517-887-4311
hasienko@ingham.org
Laura Peterson, BS, MA
Deputy Health Officer
Health Plan Management
Phone: 517-887-4359
lpeterson@ingham.org
Jaeson Fournier, DC, MPH
Deputy Health Officer
Community Health Care Services
Phone: 517-887-4311
jfournier@ingham.org
Renee Canady, PhD
Deputy Health Officer
Nursing Services – Special Programs
Phone: 517-887-4466
rcanady@ingham.org
Judy Williams, BSN, MPA
Supervisor, Communicable Disease
Phone: 517-887-4308
jwilliams@ingham.org
Marcus Cheatham, PhD
Assistant Deputy Health Officer
Phone: 517-887-4311
mcheatham@ingham.org
John Jacobs, BS, CPA
Chief Financial Officer
Phone: 517-887-4311
jjacobs@ingham.org
Barb Mastin, MA
Chief Operating Officer
Health Care Services
Phone: 517-887-4361
bmastin@ingham.org
Rona R. Harris
Director of Planning & Special Services
Phone: 517-887-4568
rharris@ingham.org
Jim Wilson, MPH
Director, Environmental Health
Phone: 517-887-4312
jwilson@ingham.org
