Our Staff

Meet Our Staff

Dean C. Ringle, P.E., P.S.

Dean C. Ringle, P.E., P.S.

Executive Director

Dean C. Ringle, P.E., P.S., began as CEAO's Executive Director in July 2017. Prior to joining CEAO, Mr. Ringle worked at the Franklin County Engineer’s Office for more than 36 years, with the last 17 years serving as the Franklin County Engineer. Throughout his career at the engineer’s office, he held positions in construction, surveying, and overall engineering management. During those years Mr. Ringle also served in various capacities and on various committees for CEAO, in addition to being recognized as the 2011 County Engineer of the Year by CEAO and the 2013 National Urban County Engineer of the Year by the National Association of County Engineers. Mr. Ringle received his Bachelor of Science Degrees in Civil Engineering and Surveying from The Ohio State University and is a registered Professional Engineer and Professional Surveyor in Ohio. Mr. Ringle was the 2019-20 National Council of Examiners for Engineering and Surveying (NCEES) president. He spent 25 years as an adjunct faculty member at The Ohio State University’s College of Engineering, and serves on the boards of the Ohio State Board of Registration for Professional Engineers and Surveyors, the Ohio Public Works Commission and the OSU Civil, Environmental and Geodetic Engineering Advisory Board.

Amy Lowe

Amy Lowe

Events Manager

Amy joined the CEAO team in August 2017 bringing with her over 18 years of work experience in the public sector. Prior to joining CEAO, Amy worked as the Director of Communications for the Franklin County Engineer's Office. She also spent 8 years as the Community Affairs Coordinator working in community relations, members services, event planning, website design and social media for the Mid-Ohio Regional Planning Commission (MORPC). She holds a Bachelor of Business Administration Degree from Mount Vernon Nazarene University. Amy is the primary contact for all CEAO conferences and events.

Kari Gianangeli

Kari Gianangeli

Business & Marketing Manager

Kari joined the CEAO team in March of 2020, bringing with her many years of experience as an administrative and legal assistant working with law firms and non-profits in Central Ohio. Kari manages our day-to-day business operations, integrates marketing strategies to build new supporting member relationships while fostering existing ones, and assists members on using the CEAO events app while providing support on site at all CEAO events. In addition, she keeps our members and sponsors frequently updated through her management of CEAO’s growing social media accounts with the intent to cultivate a network for the engineering and surveying professions. Kari graduated summa cum laude from Franklin University with a Bachelor of Science degree majoring in business administration and a minor in marketing.  In addition to her roles at CEAO, Kari also works part time as a legal assistant at The Law Office of Charles Mifsud, LLC located in Dublin, Ohio where she has been employed since March of 2009. In her free time, Kari enjoys her volunteer role serving as a support sister with Mommies Matter, a non-profit which assists single mothers, as well as traveling with her husband and three children.

Jen Diamond

Jen Diamond

Administrative Assistant

Jen provides administrative support to CEAO by assisting with conferences, accounting and general office management, as well as additional support with special projects, as needed.  Prior to joining CEAO in September, 2023, Jen worked 11 years at Nationwide as an Underwriter, IT Business Analyst and IT Quality Assurance Tester. In addition to working at a nonprofit, Jen has volunteered at school and team sports for her children and the community. Jen graduated from The Ohio State University with a B.S. in Family Relations and Human Development.


Benjamin A. Sigall

Legal Counsel

Benjamin A. Sigall, Esq., Sigall.Law

Ben brings more than a decade of wide-ranging experience at large, regional firms and as a prosecuting attorney for numerous entities, including the Ohio Attorney General’s Office. His practice focuses on defending businesses in complex civil and class action litigation, primarily related to consumer protection and privacy concerns. 

Mark Sherman

Bridge QA/QC Consulting Engineer

Mark Sherman graduated from The Ohio State University in 1979 with a Bachelor of Science in Civil Engineering with a concentration in structures. He started his long career at the Franklin County Engineer’s office before graduation in the construction department as a project engineer.  He moved over to the bridge department to oversee the bridge maintenance crews, along with design before becoming Bridge Engineer in 1987, then became Dean Ringle’s Chief Deputy Engineer in 2001 before retiring in 2017 after 38years with the county.  After a few weeks of retirement, Mark joined the engineering consulting firm of American Structurepoint until 2021.  Mark is now proud to begin the next phase of his career working with Dean once more as the CEAO Federal Bridge QA/QC Engineer.

Michael T. Evans

Legislative Consultant

Michael T. Evans, President of AP Consulting, is the contract lobbyist for CEAO.  With 8+ years of lobbying experience in advocating and advising trade associations and elected officials with interests at the local, state and federal government levels, Michael has extensive knowledge of both issue and candidate campaign strategy. Her education includes a M.B.A – Specialization in Project Management from Ashland University, Post Graduate Degree – Certified Paralegal from Capital University Law School, and a B.S. in Communication from Ohio University.