Offinger Staff

Professional association and event staff with a passion for excellence

Executive Staff

Walt Walter Offinger

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Walter Offinger is the Director of Offinger Management Company. Offinger Management Company is an association management company that manages a variety of state, national and international non-profit membership organizations and produces expositions and events, both trade and consumer, in venues throughout the country.

He holds memberships in a number of industry and conservation organizations. He serves as a Board Member of Genesis Health Care System, (a not-for-profit health delivery system) and Past Chair and Board Member of The Wilds (10,000 acre not-for-profit International Center for the Advancement of Conservation and Wild Animals).

Offinger graduated from Denison University with a B.A. in Business and served in the U.S. Air Force for six years in an Ohio Air National Guard Unit.

Kim Kim Vierstra
President and CEO

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Kim Vierstra is currently the President and CEO of Offinger. She has been with Offinger for more than 20 years and was previously the Executive Vice President, Vice President of Operations, Director of Operations, Director of Associations and Trade Shows, Association/Trade Show Manager and Administrative Assistant with Offinger. Now, she works with executive management to develop company policies, goals and objectives.

She is responsible for directing and supervising managers in the Accounting, Technology, Human Resources, Customer Service and Administration Departments. She has successfully overseen the implementation of several internal operations to improve customer service including an automated fulfillment system, computer network upgrade, an accounting system, and several company standards to maximize efficiency and the design and release of Offinger's Web site. She holds memberships in the Association Management Company Institute (AMCI) and Experience Columbus (CVB).

She earned a Bachelor's Degree in Business Administration from The Ohio State University.

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Mark Mark Bennett, CAE, IOM
Account Executive

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Mark Bennett has more than 19 years experience in association management. He has served as Executive Director of multiple trade and professional associations on both the state and national level in the health care, insurance, building maintenance, turf grass and design industries. He has been an account executive with Offinger for more than 13 years and currently serves as Executive Director of the Ohio Land Title Association, Ohio Lawn Care Association and the International Window Cleaning Association.

In 2004, he earned his Certified Association Executive (CAE) designation from the American Society of Association Executives. Bennett is a Past President of the Ohio Society of Association Executives. He is also a past member of the Board of Trustees of the Columbus Montessori Education Center. Bennett was a recipient of the Association Forum of Chicagoland and USAE Magazine’s inaugural Forty Under 40 Awards recognizing association professionals who demonstrate strong leadership skills and potential along with a solid commitment to the association industry.

Previous to working with Offinger, Bennett was Assistant Executive Director and Director of Communications for the Ohio Travel Association. He holds a Certificate in Organization Management from the US Chamber's Institute for Organization Management and a Bachelor's Degree in Journalism from Ohio University.

Denise Denise Brosie
Account Executive and Event Manager

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Denise Brosie has been with Offinger Management Company for over 29 years. She is the Event Manager for Memories Expo and the Crochet Guild of America. She provides account support for the Association of Environmental & Engineering Geologists. Denise also handles the registration for the Ohio Hardwood Furniture Market.

In her many years at Offinger, Denise has managed events as large as 1,500 booths. She has also managed several events with over 200 hours of educational sessions running simultaneously and many other activities such as banquets, contests and tours.

Gayla Gayla Fleming
Account Executive and Event Manager

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Gayla Fleming has been with Offinger Management Company for more than 20 years. She is the account executive for the Ohio Forestry Association and the Restaurant Facility Management Association and the event manager for Offinger’s Handcrafted Marketplaces and the Paul Bunyan Show. Prior to her role with associations and trade shows, Gayla was the assistant manager for Offinger Travel.

Prior to working for Offinger, Gayla was employed by Uniglobe for three years as a travel agent, Upstate Travel as a travel agent for one year and Sky Courier as a customer service manager for five years.

Dawn Dawn Sink Kennedy, CAE
Account Executive

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Dawn has extensive association and event management experience working both with trade and professional associations as well as in the corporate sector.

Throughout her career, she has doubled one organization’s educational revenue, launched online learning initiatives, created strategic sponsorship packages and managed certification programs. During her time in corporate retail, she was responsible for a variety of large scale events and programs with budgets in excess of $2 million. She led a large group of cross-functional partners to ensure projects were completed on time and on budget.

Dawn has managed multiple association budgets ranging from $25,000 to over $200,000 as well as managed multiple events include annual conferences, board and committee meetings, strategic planning sessions and golf outings – some with more than 900 attendees.

During her career in association management, Dawn has worked with the following organizations: Professional Lighting & Sign Management Companies of America, Association of Environmental & Engineering Geologists, Community Development Society, Ohio School Nutrition Association, Ohio Academy of Nursing Homes, American Ceramics Society, Professional Insurance Agents Association, Builders Exchange of Central Ohio and Ohio Association of Physical Education, Health, Recreation and Dance.

She earned her Certified Association Executive (CAE) designation from the American Society of Association Executives and holds a Bachelor of Arts degree from the Ohio State University.

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Page Page Smith, SPHR, SHRM-SCP
Human Resource Manager

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Page joined Offinger in 2003 with more than 11 years experience in Human Resource Management, and 22 years management experience. As the Human Resource Manager, Page is responsible for the development and administration of personnel policies and procedures, goals and objectives, employment, benefits and compensation, training and employee relations.

She earned her Senior Professional in Human Resources certification from the HR Certification Institute, which is an affiliate of the Society for Human Resource Management (SHRM) in 2009 and her Senior Certified Profession in Human Resources from the Society for Human Resource Management (SHRM) in 2015. She attended Ohio University and served as President of the Muskingum Valley Human Resource Management Association, served on the Board of the Ohio Society for Human Resource Management State Council and is a member of the Society for Human Resource Management and the Ohio Society of Association Executives.

Deb Deborah Walston
Technology Director

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Deborah has been leading technology projects at Offinger Management Company since 1992. She guides the talented Technology Team, responsible for Offinger's cloud computing initiatives, association and event management systems and reporting needs.

As part of a vibrant and growing association management company, she is keenly interested in finding the best technology tools to help association and event clients reach their objectives while keeping technology costs reasonable. Deborah is a graduate of The Ohio State University with a Bachelors of Science in Computer and Information Science and is a member of The Association for Computing Machinery (ACM).

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