Board Member Bios

Members of the Greenville Transit Authority Board of Directors welcome comments and suggestions about Greenlink’s service and policies.

However, complaints regarding a customer experience should be provided to Greenlink staff to investigate.

Complaints may be emailed to, may be submitted through this online form, or may be received through the feedback hotline at 864-467-4544.

Amanda Warren

Amanda Warren, Chair 

Amanda Warren is the Director of Development and Operations for LiveWell Greenville, a nonprofit coalition working to advance healthy equity in Greenville County. Prior to working at LiveWell Greenville, she served as the Associate Director of Integrated Services at United Ministries, where she worked for over 15 years.

A former college soccer player, Amanda serves as a soccer coach for an elite-level select team through the United FC Furman Soccer Club.  She volunteers in various coordinator and committee capacities at Westminster Presbyterian Church and at her children’s schools. She also is a past president of her neighborhood’s homeowners’ association.

Amanda graduated with high honors from Furman University with a bachelor’s degree in music education and spent four years teaching in a Title I school before making the change to nonprofit work. She was a member of Leadership Greenville Class 44 and first began advocating for public transit alongside several of her Leadership Greenville classmates.

Walker Smith (PNG)

Walker Smith, Vice Chair 

Walker Clarkson Smith is a consultant specializing in government affairs and public relations. She served as the Director of Government and External Relations for Bon Secours Mercy Health, the parent company of Bon Secours St. Francis Health System, from 2014 to 2021. Before joining Bon Secours Mercy Health, she gained experience in government relations working for Congressman Jeff Duncan, the SC Bankers Association, Senator Saxby Chambliss, and Senator Strom Thurmond. 

Walker serves on the boards of Roper Mountain Science Center, Upcountry History Museum, and Greenville Downtown Rotary and is an active member of Christ Church Episcopal. She graduated from the University of South Carolina, where she received a bachelor’s degree in mathematics. 

Sean Rusnak

Sean Rusnak, Treasurer

Sean Rusnak is a consulting associate with Openfields, a Greenville-based strategy consulting firm committed to helping visionary leaders imagine and accelerate possibilities for social impact. Prior to joining Openfields, Sean worked in several roles at the nexus of public health and the built environment, including working with Greenville Connects to advocate for increased local investment in Greenlink and as a planner with Alta Planning + Design, a firm specializing in active transportation.

Sean graduated with honors from Furman University with bachelor’s degrees in political science and public health. He then went on to obtain his Master of Public Health and Master of Urban Planning degrees from the University of Colorado Denver.

Stephen Astemborski photo

Stephen Astemborski 

Stephen Astemborski is the Director of SC Aerospace for the South Carolina Council on Competitiveness. He moved to Greenville in 2015 to work for General Electric and has held a variety of positions with both GE Aviation and GE Power, including operations leader, quality engineer and his current role as manufacturing projects specialist. Before joining GE, Stephen was an officer in the United States Army and was assigned to a cavalry squadron based in Fort Carson, Colorado. He served as a scout platoon leader, human resources officer and assistant operations officer, and was deployed to both Afghanistan and Kuwait. He left active duty in 2014 with the rank of Captain.

Stephen graduated with honors from the United States Military Academy at West Point, where he earned a bachelor’s degree in mechanical engineering. He currently serves as president of the West Point Society of Upstate South Carolina and was co-chair of the Class of 2009’s 10-year reunion gift campaign. Stephen is a former mentee in the Greenville Chamber’s Pacesetters program and is an active member of Our Lady of the Rosary Catholic Church.

Santora Bowling

Santora Bowling 

Santora Bowling serves as the Senior Community Relations Manager for Michelin North America, Inc. and works to strengthen ties with local communities where Michelin operates by contributing to the vitality of the region and encouraging employees to get involved. Prior to joining Michelin, she worked at BMW Manufacturing holding various roles in recruiting, employee relations and training. 

Santora is a graduate of the University of South Carolina in Columbia where she received a bachelor’s degree in organizational management. Santora also serves on the Public Education Partners board, East North Street Academy School Improvement Committee and Upstate Mobility Alliance – Vanpool Steering Committee. She is a member of Leadership Greenville Class 42 and actively supports numerous non-profit organizations in the community.

Addy Matney

Addy Matney 

Addy Matney is the senior executive consultant/vice president of community relations for TM Public Relations, and works with non-profits and community groups to strengthen capacity through strategic planning, board development and organizational assessment. Active in numerous non-profit organizations, Addy was chair of The Children's Museum of the Upstate board of directors from 2014 to 2015, and continues to serve on the board as past chair. She was also the 2015 chair of the Piedmont Health Foundation's board of directors and a member of the Transportation Study Task Force. In the past, she served the community working with Pendleton Place for Children and Families, the Circle of The Children's Museum and the Junior League of Greenville, and was a member of the Finance and Worship committees at Mauldin United Methodist Church. Addy graduated with honors from Clemson University with bachelor's degrees in political science and English.

David Mitchell

David Mitchell 

David Mitchell is the founder of Talent Management Solutions, a full service recruiting, professional executive placement and consulting firm, and member of the Greenville Chamber's inaugural Minority Business Accelerator Program. His community and civic involvement includes serving as the past chair of the GTA board of directors, former chair of the Greenville Housing Authority board of commissioners, chair and board member of the Friends of Richland Cemetery and former regional membership chair for Omega Psi Phi Fraternity, Inc.

David currently serves on the Greenville Chamber's Inno-Venture Prism Minority, Small Business Awards and Small Business Diversity committees. He is a graduate of Leadership Greenville Class 36 and continues to work with Leadership Greenville programs as the current chair and as a member of the selection committee. Additionally, David recently served as chair of the Greenville County Democratic Party and attends Mount Emmanuel Missionary Baptist Church, where he is the church clerk and chair of the Trustee Ministry.

David received an associate's degree in business from Spartanburg Methodist College, a bachelor's degree in business from Limestone College and a master's degree in human resources from Clemson University. David also holds postgraduate certifications in leadership from Columbia University in New York and organizational development from DePaul University in Chicago.