Meet the Staff

Gray Taylor

Executive Director

Gray literally grew up in the convenience store industry with the opening of the family’s first convenience store in 1963.  Involved in the family business, comprised of 87 stores, he gained experience in all phases of convenience store and chain retail operations. 

Gray has been involved on a variety of projects, including heading global product management for three of the world’s largest retail petroleum equipment and systems suppliers and Vice President of Research & Technology for the National Association of Convenience Stores (NACS). Gray managed product portfolios that included payment platforms for EMV migration markets from Malaysia to Canada, as well as mobile/RFID payments initiatives.  Gray also established NACS’ card payments program which saved the industry $60M in its first year of operations, and currently serves over 1,500 stores, doing 100m transactions annually.

Gray lives in Georgetown, TX and can be reached at +1 512.508.3469, or [email protected]  

Linda Toth

Managing Director

Linda oversees all day-to-day operations of Conexxus.  In addition, she advocates on behalf of the convenience industry at EMVCo, the US Payments Forum (formerly the EMV Migration Forum) Petroleum Working Group, and the National Conference on Weights and Measures.  Linda participates in the World Wide Web Consortium (W3C), ANSI X9 subcommittees working on payments, and is facilitator for the Petro SIG at the Merchant Advisory Group (MAG).

Linda graduated from North Carolina State University with a BS in Electrical Engineering.  Prior to joining the Conexxus staff in 2011, she worked for 7 years at VeriFone’s Petro division developing POS software and for 15 years at OPW Fuel Management Systems designing automatic tank gauge and leak detection equipment and software.  She has been engaged with Conexxus/PCATS since its inception, holding various leadership roles within the Device Integration Committee and its working groups.  Linda currently resides in Clearwater, Florida and can be reached at +1 727.631.5536 or [email protected]

David Ezell

Director of New Initiatives

David’s responsibilities include the surveying of new technologies such as those comprising the Fourth Industrial Revolution (IR4.0), and promoting the use of Conexxus standards, both existing and new, in these trending technology environments.   David continues to represent Conexxus at the World Wide Web Consortium, which he has been a part of since 2002.  He has led several committees at W3C and is currently a co-chair for the Web Commerce Interest Group and serves on the Advisory Committee. 

David has been involved in NACS Technology, PCATS, and Conexxus standards work since 1998, including chairing the POS/Back Office Committee, and served on the Board of Advisors from 2011 through 2018.  More recently, David has advocated for the adoption of open API architecture as a powerful way to implement Conexxus standards.

David joined the Conexxus staff January 1, 2019.  Prior to joining Conexxus, David was a Principal Software Architect in the Petroleum division at Verifone, specializing in requirements gathering, use case centric design, and XML data design and processing.

David lives in Tampa, Florida, and can be reached at +1.727.808.4918, or [email protected]

Ann Zecca

Membership and Administration

Ann is the meeting planner for all Conexxus events, including the Conexxus Annual Conference, Annual Strategy Conference, and technology field trips.  In addition, she oversees membership processing and handles administrative duties for Conexxus. 

Joining the staff in 2003, Ann is one of the original staff members of Conexxus/PCATS.  Previously, she worked in accounting as well as contemporary art sales and management.  Ann lives in Virginia Beach, VA and can be reached at +1 703.518.7963 or [email protected].

Chris Kelleher



Chrissy has spent her career in corporate marketing with business to business service-based organizations, both in-house for small businesses and as an account manager for marketing agencies.  She joined the Conexxus team in 2017 and works alongside Conexxus staff and on the Membership & Marketing Committee.  She manages the strategic planning and implementation of the annual marketing campaigns which includes Annual Conference and membership campaigns, website content, email campaigns, and other branding initiatives throughout the year.

Chrissy has an MBA from Loyola University Maryland and a Bachelor’s Degree in Business/ Marketing from the University of Pittsburgh.  She lives in Baltimore, Maryland and can be reached at [email protected]

Donna Perkins

Standards Manager

Donna joined the Conexxus staff in February of 2020.  She works closely with many of the Conexxus committees and working groups to advance standards for the industry.

Donna is a 22 year veteran of the convenience store industry.  Her experience covers payroll, pricebook, POS data interface, electronic data, and other retail technology projects.  Donna has participated with Conexxus since 2006 on several committees and working groups. She brings a great passion for improving efficiency in the retail convenience industry. 

Donna resides in Maryville, TN and can be reached at +1.865.556.2648 or [email protected].

Kim Seufer

Standards Manager

Kim joined the Conexxus team in July of 2016. She works closely with many of the Conexxus committees and working groups to advance standards for the industry, as well as assisting with the website and other administrative tasks.

Kim graduated from Appalachian State University in 2012 with a B.A. in Political Science and Spanish Language. She then spent 3 years studying Political Science at Penn State University with a focus on lobbying behavior and social data analytics. While at Penn State, she attended the Inter-university Consortium for Political and Social Research (ICPSR) Summer Program in Quantitative Methods of Social Research at the University of Michigan and has research published in the journal Interest Groups and Advocacy. Prior to coming to Conexxus, Kim worked in real estate and as a contracted research assistant examining the consumer behavior associated with credit card usage.

Kim currently resides in Winston Salem, North Carolina and can be reached at +1.336.707.8918 or  [email protected]

Clerley Silveira

API Coordinator

Clerley joined the Conexxus team in April of 2020. He is responsible for coordinating the development of RESTful API standards. Clerley's responsibilities include supporting the development of certification tools and simulators, as well as assisting Committees, and Working Groups with API specification development.

Clerley has been involved in the Petroleum and Convenience store Industry for over twenty years, as both an architect and implementer of forecourt and payment systems. Prior to joining the Conexxus staff, he was an active contributor to the Conexxus standards effort by advocating and helping to develop standards for Mobile, Loyalty, and EPS.  He also served as the Chair of the Technical Advisory Committee.

Clerley has a BS in Computer Science from Faculdade Rui Barbosa and a Master of Science in Cybersecurity from Syracuse University.  He can be reached at: +1.727.238.5832 or [email protected]


Conexxus Mascot

Stewie became the official Conexxus mascot in 2008.  Each outgoing Chair of the Board of Advisors adds an item to Stewie's collection of memorabilia. 

Stewie and his collection can be found at every Conexxus Annual Conference.   Between Conferences, Stewie resides with the current Conexxus Chair and can be reached at [email protected].