Manning joined Cornerstone in May of 2023 following his time at Watkins & Eager PLLC, where he served as a Government Affairs Advisor. Based in Jackson, Manning supports clients at the state and federal level, specifically with infrastructure, community development, public safety, workforce development, Corps of Engineers and other issues areas.

In his previous role, he helped secure state appropriations for projects and pursued federal earmark requests, successfully advocating for tens of millions of dollars for clients. Additionally, he worked on a variety of issues including tax policy, business regulations, and federal and state regulatory approval for complex, large scale projects.

Prior to this, Manning held different roles with the Mississippi Development Authority (MDA), his last one being the Chief of Federal Affairs and Strategic Priorities, where he worked directly with the governor and his staff to support economic development. Manning was a member of the executive committee of the state's lead economic and community development agency advancing the state's priorities on a variety of federal issues including aerospace, military spending and base/mission realignment, infrastructure and defense sector recruitment.

While at the MDA he also directed the activities of six division directors with a wide variety of responsibilities from strategic policy development, community development and federal regulatory compliance, in addition to coordinating the inter-governmental affairs of the agency, including working closely with the Office of the Governor, statewide elected officials, other state executive agencies, the state legislature and the federal Congressional delegation.

Manning holds a bachelor's degree from the University of Mississippi.

Drew Maddox joined the Cornerstone Mississippi team in February 2020 as a vice president with more than 10 years of experience in finance and education policy. Previously, Drew served as the chief financial officer of the Mississippi Department of Revenue, where he oversaw all administrative divisions of the department, including accounting, communications, processing, information technologies and logistics. As CFO, Drew also worked closely with state legislators and statewide elected officials to guide tax policy decisions, liquor laws, and revenue-generating activities.

Prior to his time at the Department of Revenue, Drew also worked as director of state engagement at EdBuild, where he used his knowledge of political and governmental structures to strategically place educational reform proposals in the best positions for success in state legislatures across the country. Drew has also worked at the Mississippi Legislative Budget Office as the Senate budget officer, where he worked closely with leadership to craft and pass balanced budgets.

Drew received his Bachelor of Arts in English literature and his Bachelor of Business Administration degrees from Millsaps College in Jackson, Mississippi. Drew enjoys spending time with his wife and two children (Sam and Bee), baseball, and gardening.

20+ years

Austin Barbour brings a dual private and political-sector resume to Clearwater Group, the company he co-founded in 2011.

Barbour began building his extensive client list in 2003, as a government relations specialist at the regional firm, Capitol Resources, where he was hired after breaking all state fundraising records as Finance Director for Haley Barbour's first campaign for Governor of Mississippi in 2003. He took a leave of absence from lobbying during 2008 to serve as Campaign Manager for Senator Roger Wicker in his first bid for the U.S. Senate.

Prior to his work on the lobbying and political scene, Barbour created and grew a new financial services division for Security Holdings, LLC, one of the nation's fastest growing businesses.

In 2011, Barbour brought together his successes in business and politics, and opened the doors at Clearwater Group, LLC, where he serves as Managing Partner and specializes in fundraising and business development as well as government affairs issues dealing with appropriations, defense, state and federal procurement and contracting, education, environment, manufacturing and public safety.

Most recently, Barbour served as Executive Director of the national super PAC for Governor Rick Perry's presidential campaign. Austin served as a Senior Advisor on Gov. Jeb Bush's presidential campaign.

Barbour has also been recognized as one of the nation's top fundraisers with previous positions including the National Finance Chairmen for Romney for President in 2012 and a Senior Fundraising Consultant for the National Republican Senatorial Committee.

He also held the position of State Finance Chairman for the Mississippi Republican Party in 2010-2011, was on the Transition Team for Governor Phil Bryant and is on the Finance Committee for Lt. Gov. Tate Reeves. He served as a member of the strategy team for Romney for President in 2012 and was the Senior Strategist for the successful re-election campaign for U.S. Senator Thad Cochran in 2014.

Austin manages the day-to-day operations of the firm. He leads the firm's strategic communications practice area and is also intimately involved with Clearwater Group's legislative lobbying and political activity practice areas.