Key Staff
Dean Sienko, MD, MS
Health Officer/Medical Director
Phone: 517-887-4311
dsienko@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 B. Canady, PhD
Deputy Health Officer
Nursing & Special Services
Phone: 517-887-4322
rcanady@ingham.org
Ruby Rogers, RN, BSN
Supervisor, Communicable Disease
Phone: 517-887-4308
rrogers@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
Melany Mack, MSW
Director of Public Health Services
Phone: 517-887-4568
mmack@ingham.org
Jim Wilson, MPH
Director, Environmental Health
Phone: 517-887-4312
jwilson@ingham.org
