Meet the ADR Notable Team!

We are a small but growing company proudly based in Columbus, Ohio. Our mission is to help those who help others resolve disputes. Learn more and meet the ADR Notable team below!

Gary Doernhoefer


Gary graduated from Grinnell College and holds a J.D. from the University of Chicago Law School. Gary started out as a litigation associate for Mayer, Brown and soon moved in-house at American Airlines. At AA, he focused on major case litigation, antitrust, and, eventually, government affairs. In 2000, he became the initial General Counsel for Orbitz. After the Orbitz IPO and subsequent sale in 2004, Gary co-founded and served as General Counsel for Accertify, a credit card fraud prevention solution for internet merchants. Accertify was acquired by American Express in 2010, after which Gary served three years as General Counsel for IATA, the global trade association for the airline industry. Gary then joined the travel industry startup Journera as Vice President and General Counsel, before shifting his focus to developing ADR Notable. The catalyst for ADR Notable was collaborative work with faculty at the Moritz College of Law at the Ohio State University, studying the potential benefits of greater use of ADR by the airline industry.

Matt Zenko

Chief Operating Officer

An attorney with experience in alternative dispute resolution and accounting, Matt Zenko serves as the Chief Operating Officer of ADR Notable. Matt’s legal training focused on the areas of negotiation, mediation and arbitration. He has served as either a mediator or client advocate in a wide variety of legal cases.

Lynn Zingraf

Marketing Consultant

Lynn has an established career in marketing, customer support, and business management across a range of technology-related companies. He helps organizations and individuals to define and achieve their objectives. Lynn provides marketing-related services to ADR Notable.

Sydney Riddle

Customer Success & Marketing Analyst

Sydney graduated from the Ohio State University with a degree in journalism and a minor in media production and analysis. While attending OSU, she served as editor of the student-run newspaper The Lantern. As ADR Notable’s customer success & marketing analyst, Sydney is in charge of executing the digital marketing strategy, managing customer relations, and overseeing all inquiries submitted via our Help Desk!

Sydney Riddle, Marketing Associate at ADR Notable

Austin Overholt

Full-stack Software Engineer

Austin has worked as a full-stack software engineer for 4 years. He loves working with the latest technology. In his spare time, he enjoys being outdoors hiking, camping, rock climbing and finding the nearest body of water.

Austin Overholt, software engineer at ADR Notable

Kimberlee Klesner


After 25 years in higher education administration at the Harvard Business School and Kenyon College, Kimberlee spent 10 years designing maps and creating economics and social science data visualizations for an international publishing company before joining ADR Notable, where she consults on market development and special projects.