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OUR LEADERS
Kevin Greiner
President and Chief Executive Officer
Whether you've been an employee since the beginning or worked at Gas South for a month, Kevin Greiner is all about discovering what’s important to people—starting with never forgetting your name. At the office, Kevin won't hesitate to chat with you about what you're up to or the latest tennis highlights—he genuinely cares about every employee.
Since Gas South’s inception in 2006, Kevin has been passionate about strengthening our community. Under his leadership, Gas South has committed to giving 5% of profits to help support children in need, and he’s built a culture of service while also creating exceptional career paths for employees. He wants to make sure Gas South is a place where people want to be, not a place you feel like you have to be.
With more than 20 years in the energy sector, Kevin gained expertise in management roles with Southern Company. He graduated from the University of Michigan with a master's degree in business administration and a Master of Science in natural resources—he earned his bachelor's degree from Wesleyan University. In recognition of Gas South’s growth and corporate citizenship, Georgia Trend magazine named him Georgia’s most respected business leader in 2021, and the Atlanta Business Chronicle named him one of Atlanta’s most admired CEOs in 2018 and 2021. In 2025, The YMCA of Metro Atlanta honored Kevin with the Bransby Christian Leadership Award, the group’s highest recognition for community service.
Board work: YMCA of Metropolitan Atlanta (Chairman 2021-22), Georgia Partnership for Excellence in Education (Chairman 2016-17), Select Cobb (Chairman 2019-20), Atlanta Opera, Georgia Chamber, Metro Atlanta Chamber. Kevin is also a member of the Atlanta Rotary Club and Buckhead Coalition.
Interesting fact: Kevin speaks German and is fluent in Dekatherms (Gas South's band where he plays the keyboards). He also enjoys playing tennis, baseball, and riding his bike.
Jamie Tiernan
Chief Financial Officer
As an original member of Gas South’s leadership team following the company’s formation in 2006, Jamie has 20 years of senior leadership experience and serves on Gas South’s Management Committee. As Chief Financial Officer, Jamie is responsible for the Accounting, Finance & Treasury organization of Gas South, a $1.3 billion natural gas marketer operating in competitive markets serving nearly 500,000 residential, C&I, and wholesale customers.
He’s a CPA, holds a BBA in accounting from the University of Georgia and an MBA in finance from Georgia State University.
Jamie is passionate about building amazing teams with a culture of ownership, risk-taking and learning to support growth.
Board Work: He’s an active board member and proud supporter of Scouting America’s Atlanta Area Council, Junior Achievement of Georgia and Heating Energy Assistance Team.
Interesting fact: Outside of work, you’ll find Jamie behind a chessboard or on a pickleball court.
Jason Dolder
Chief Sales and Marketing Officer
With over 15 years of experience in sales and marketing, Jason is a results-oriented leader who is deeply passionate about our customers and our employees. As Chief Sales and Marketing Officer at Gas South, he leads the Sales and Marketing teams with a proven track record of driving Gas South’s growth and developing strategic marketing initiatives.
Prior to joining Gas South, Jason served as the Vice President of Sales and Marketing at Infinite Energy, where he expanded the company's sales and empowered marketing and customer experience teams. Prior to Infinite Energy, Jason held sales and marketing leadership roles at Naylor Association Solutions focused on developing teams and delivering results.
Jason holds a Master of Business Administration from the University of Illinois, a Master of Science in integrated marketing communications from Eastern Michigan University, a Master of Science in management and leadership from Troy University and a Bachelor of Science from the University of Iowa.
Residing in Gainesville, Florida, with his wife and son, Jason's interests outside of work include traveling and staying active through regular workouts.
Board Work: The United Way of North Central Florida
Freddy Cardozo
Chief Supply & Risk Officer
As Gas South’s Chief Supply & Risk Officer, Freddy leads a team responsible for the company’s wholesale natural gas supply and trading, managing transportation and storage assets, risk management, middle office functions and providing cost structures for pricing. Freddy has over 25 years of experience in the energy industry in both the regulated and deregulated markets. He’s testified multiple times before the Georgia Public Service Commission as an expert in the deregulated natural gas industry.
He joined Gas South in 2006, coming from Southern Company where he worked as a Structuring Principal for two years. Before that, he was a Senior Analyst at Mirant Corporation. And prior to that, he worked as a power transmission planning engineer for the National Administration of Electricity (ANDE), the electric utility of Paraguay.
Freddy holds a bachelor’s degree in electrical and mechanical engineering from the National University of Asuncion, Paraguay. He earned a Master of Science degree from Arizona State University as a Fulbright Scholar and studied management of energy utilization and conservation at the Israel Institute of Technology in Haifa, Israel.
Board Work: St. Vincent de Paul (2013-2020)
David Malone
Chief Operating Officer
David believes that people power our business. He’s committed to making life better for our customers, employees and the community. That's why he’s thrilled to be part of a company with those same values.
With over two decades of leadership experience spanning Marketing, Sales, Operations and IT, David has been an integral part of Gas South since its inception. As the Chief Operating Officer (COO), he leads the Operations, IT, and Customer Care teams, focusing on driving efficient processes, implementing technology that supports customers and employees and fostering a service culture that aims to exceed our customers’ expectations every day.
David holds bachelor’s and master’s degrees in economics from Florida State University.
Board Work: The Salvation Army
Interesting fact: Outside of work, David loves photography, spending time with family and backpacking.
Stacy Paez
Chief Legal & People Officer
As an experienced professional in the fields of law and HR, Stacy knows people often think of the two areas as challenging opposites that are hard to mix. But it’s this intricacy she enjoys most, finding ways in which these two distinct areas complement each other and working with others to find the best solutions to complex issues.
As Chief Legal and People Officer at Gas South, Stacy is responsible for providing leadership and oversight in legal services, HR, community affairs, regulatory and legislative affairs, and corporate compliance. Stacy is also a key member of the executive leadership team and provides general counsel.
Before joining Gas South, Stacy served as General Counsel and VP of Legal and HR at Infinite Energy, where she started in 2009. Throughout her time at Infinite Energy, she held roles as Corporate Counsel, HR Manager and Executive Director of Human Resources.
Originally from rural Pennsylvania, Stacy moved to Florida to earn a Bachelor of Arts from Flagler College in St. Augustine. She later earned a law degree from the University of Florida in Gainesville.
When she’s not at work, she enjoys spending as much time as possible with her husband and two children creating “art,” ziplining in her back yard, hiking, going to the beach and visiting parks and museums.
President and Chief Executive Officer
Chief Financial Officer
As an original member of Gas South’s leadership team following the company’s formation in 2006, Jamie has 20 years of senior leadership experience and serves on Gas South’s Management Committee. As Chief Financial Officer, Jamie is responsible for the Accounting, Finance & Treasury organization of Gas South, a $1.3 billion natural gas marketer operating in competitive markets serving nearly 500,000 residential, C&I, and wholesale customers.
He’s a CPA, holds a BBA in accounting from the University of Georgia and an MBA in finance from Georgia State University.
Jamie is passionate about building amazing teams with a culture of ownership, risk-taking and learning to support growth.
Board Work: He’s an active board member and proud supporter of Scouting America’s Atlanta Area Council, Junior Achievement of Georgia and Heating Energy Assistance Team.
Interesting fact: Outside of work, you’ll find Jamie behind a chessboard or on a pickleball court.
Chief Sales and Marketing Officer
With over 15 years of experience in sales and marketing, Jason is a results-oriented leader who is deeply passionate about our customers and our employees. As Chief Sales and Marketing Officer at Gas South, he leads the Sales and Marketing teams with a proven track record of driving Gas South’s growth and developing strategic marketing initiatives.
Prior to joining Gas South, Jason served as the Vice President of Sales and Marketing at Infinite Energy, where he expanded the company's sales and empowered marketing and customer experience teams. Prior to Infinite Energy, Jason held sales and marketing leadership roles at Naylor Association Solutions focused on developing teams and delivering results.
Jason holds a Master of Business Administration from the University of Illinois, a Master of Science in integrated marketing communications from Eastern Michigan University, a Master of Science in management and leadership from Troy University and a Bachelor of Science from the University of Iowa.
Residing in Gainesville, Florida, with his wife and son, Jason's interests outside of work include traveling and staying active through regular workouts.
Board Work: The United Way of North Central Florida
Chief Supply & Risk Officer
As Gas South’s Chief Supply & Risk Officer, Freddy leads a team responsible for the company’s wholesale natural gas supply and trading, managing transportation and storage assets, risk management, middle office functions and providing cost structures for pricing. Freddy has over 25 years of experience in the energy industry in both the regulated and deregulated markets. He’s testified multiple times before the Georgia Public Service Commission as an expert in the deregulated natural gas industry.
He joined Gas South in 2006, coming from Southern Company where he worked as a Structuring Principal for two years. Before that, he was a Senior Analyst at Mirant Corporation. And prior to that, he worked as a power transmission planning engineer for the National Administration of Electricity (ANDE), the electric utility of Paraguay.
Freddy holds a bachelor’s degree in electrical and mechanical engineering from the National University of Asuncion, Paraguay. He earned a Master of Science degree from Arizona State University as a Fulbright Scholar and studied management of energy utilization and conservation at the Israel Institute of Technology in Haifa, Israel.
Board Work: St. Vincent de Paul (2013-2020)
Chief Operating Officer
David believes that people power our business. He’s committed to making life better for our customers, employees and the community. That's why he’s thrilled to be part of a company with those same values.
With over two decades of leadership experience spanning Marketing, Sales, Operations and IT, David has been an integral part of Gas South since its inception. As the Chief Operating Officer (COO), he leads the Operations, IT, and Customer Care teams, focusing on driving efficient processes, implementing technology that supports customers and employees and fostering a service culture that aims to exceed our customers’ expectations every day.
David holds bachelor’s and master’s degrees in economics from Florida State University.
Board Work: The Salvation Army
Interesting fact: Outside of work, David loves photography, spending time with family and backpacking.
Chief Legal & People Officer
As an experienced professional in the fields of law and HR, Stacy knows people often think of the two areas as challenging opposites that are hard to mix. But it’s this intricacy she enjoys most, finding ways in which these two distinct areas complement each other and working with others to find the best solutions to complex issues.
As Chief Legal and People Officer at Gas south, Stacy is responsible for providing leadership and oversight in legal services, HR, community affairs, regulatory and legislative affairs, and corporate compliance. Stacy is also a key member of the executive leadership team and provides general counsel.
Before joining Gas south, Stacy served as General Counsel and VP of Legal and HR at Infinite Energy, where she started in 2009. Throughout her time at Infinite Energy, she held roles as Corporate Counsel, HR Manager and Executive Director of Human Resources.
Originally from rural Pennsylvania, Stacy moved to Florida to earn a Bachelor of Arts from Flagler College in St. Augustine. She later earned a law degree from the University of Florida in Gainesville.
When she’s not at work, she enjoys spending as much time as possible with her husband and two children creating “art,” ziplining in her back yard, hiking, going to the beach and visiting parks and museums.
