About Us

Mark Fiala

Mark Fiala brings nearly 30 years of strategic human resources leadership and human resources consulting experience to provide you with solutions to your business’ needs in talent management. As a member of senior management himself, Mark has led the Human Resources functions in both privately-held and public companies with revenues exceeding $500 million. Mark understands your needs and can provide solutions to help you achieve your organization’s goals.

Prior to Organizational Architecture, Mark held senior human resources positions in the retail, specialty chemical and mortgage industries. Additionally, he has experience in the insurance and health care industries. He holds the designations of Certified Employee Benefits Specialist and Senior Professional in Human Resources. Mark earned his MBA from The Ohio State University.

Mark served in the United States Navy as an intelligence officer.

Download full bio here.

Contact Mark at markfiala@oahumanresources.com or connect with him on Linkedin here.


Ryan Sheehan

Ryan Sheehan is an accomplished human resources and talent management professional with a solid track record of aligning people and business strategies. Across his 15 years of career experience, he has developed, implemented, and improved HR programs, processes, and tools/technologies. Also, Ryan is adept at directly matching top talent with esteemed employers and creating strong talent acquisition strategies, trainings, and teams.

Prior to partnering with Organizational Architecture, Ryan grew and led the HR function of a four-time Weatherhead 100 award recipient – an emerging staff augmentation/Healthcare IT company based in Cleveland, Ohio. Additionally, he has worked for local, regional, and international companies within the healthcare, not-for-profit, information technology, and professional services industries. Ryan earned his Bachelor of Arts degree in Communications and Psychology from John Carroll University.

Contact Ryan at ryansheehan@oahumanresources.com or connect with him on Linkedin here.


Heather Brown

Heather Brown provides support to clients and staff as Office Manager.  She brings experience as a business owner having established both a successful hair salon and school of cosmetology in Colorado, as well as providing office and bookkeeping support for a general contractor/construction company.  Her experience with small business operations not only helps us at OA but our clients as well.

In addition to her training and licensure in the salon industry, Heather earned an Associate of Arts degree from the University of Cincinnati.

Contact Heather at heatherbrown@oahumanresources.com or connect with her on Linkedin here.