Jim Zieba, J.D.
Executive Director

Jim Zieba has served as the Executive Director of the Indiana Optometric Association since September 2005. He obtained his Bachelor of Arts degree in Political Science from Purdue University and his Juris Doctor degree from Valparaiso University School of Law. He is admitted to practice law in the State of Indiana and the Federal District Court for the Southern District of Indiana.
His government relations experience includes:
Director of Government Relations, Indiana State Medical Association
Director of Education Policy, Indiana Chamber of Commerce 
Indiana Senate Intern & Reading Clerk
His legal experience includes:
Staff Judge Advocate, 38th Infantry Division, Indiana Army National Guard
Staff Judge Advocate, Task Force Cyclone, U.S. Army, Afghanistan (2009-2010)
Deputy Staff Judge Advocate, 38th Infantry Division (Mechanized), Indiana Army National Guard 
Deputy Staff Judge Advocate, Task Force Eagle, U.S. Army, Bosnia & Herzegovina (2004)  
Attorney, Bowen & Mader, Richmond, Indiana 
Law Clerk, Consumer Protection Division, Indiana Attorney General's Office 
Law Clerk, United States Senate, Subcommittee on Children, Families, Drugs & Alcoholism.
Jim holds the rank of colonel in the United States Army.  Jim has served with distinction in the Indiana Army National Guard for over twenty-three years as a Judge Advocate. He has been deployed overseas twice, to Bosnia and Afghanistan.

Marilyn Carter
Deputy Executive Director

Marilyn Carter rejoins the IOA to serve as the executive director during Jim Zieba’s military deployment until the spring of 2020. Marilyn was previously with the IOA from 2011-2013. Marilyn served as the infant mortality liaison at the Indiana State Department of Health under health commissioner Dr. Jerome Adams, now U.S. Surgeon General. She also was the director of communications and public relations at the Indiana State Medical Association. Her bachelor’s degree from Indiana University is in political science and communications. Marilyn was a reporter at WRTV in Indianapolis for 15 years. She is a native Hoosier hailing from northwest Indiana.

DeAnna Ferguson
Director of Administration

DeAnna Ferguson joins the IOA with over 20 years of healthcare experience. The last eight years were dedicated specifically to optometry, as she served as a practice manager in a local optometry office. DeAnna studied business at Anderson University and has extensive training in medical billing and coding. She currently resides in Carmel with her husband , daughter and 3 dogs.

Lisa Sheridan
Director of Marketing & Communications

Lisa Sheridan has served on the staff of the Indiana Optometric Association as Director of Marketing and Communications since 2014. Prior to the IOA, Lisa provided freelance writing, editing, marketing and social media management, while a stay at home mom. She has worked in several industries in the area of public relations and marketing, including tourism, healthcare, architecture and accounting. She has also served as a copy editor on several publications. Lisa is a graduate of St. Joseph’s College in Rensselaer, Indiana, and received a Master of Library Science from Indiana University.

Bridget Sims
Membership Secretary/Receptionist

Bridget Sims joined the IOA staff in September 1996. She serves as membership secretary and receptionist. Bridget is responsible for maintaining IOA member records and data base management. Other duties include member recruitment, responding to member inquiries, accounts receivable, C.E. registrations, reports and assisting in various projects for the executive staff.
Bridget received the Meritorious Service Award in April 2016 for twenty years of service to the members of the IOA.  She also contributed to the following achievements: 2007 AOA "Best New Member Growth Certificate of Achievement and 2009 AOA "Drive for 65 Membership Campaign (IOA won $1000 prize).