Joe Sims joined Cornerstone with a wealth of experience in public and government affairs, particularly working with the energy industry in Mississippi. Prior to forming his firm, Pinnacle Consulting in 2007, he managed the US Oil and Gas Association, Mississippi/Alabama Division, in the state. His experience includes providing public and government affairs representation for the some of the largest energy companies in the nation.

Joe works in a bipartisan manner to represent his clients' interests. He has demonstrated his ability time and time again to build relationships and alliances that enable his clients to work effectively in state and local government, and to accomplish their business development goals. He has been involved in regulatory and legislative successes that have facilitated significant economic and energy development.

In addition to his state experience and contacts, he maintains very good working relationships with the members and staff of the Mississippi congressional delegation.

Joe was named to Mississippi's Top 50 Most Influential 2017 list recognizing the 50 most influential people in the state across the ranks of elected and appointed officials, economic development professionals, business, media, and government affairs.

He previously served as legislative chairman for Mississippians for Economic Progress (MFEP) during the historic 2002 Mississippi special session on tort reform. MFEP is a coalition of business, industry, and medical interests advocating civil justice reform.

Joe and his wife have three children, and four grandchildren.

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.

Elliott Flaggs joined Cornerstone's Jackson office in October 2015. He most recently served as a special assistant attorney general with the Mississippi Attorney General's Office in the capacity of legislative liaison for Attorney General Jim Hood and director of the Child Desertion Unit. His responsibilities included analyzing and advocating legislation impacting state citizens and the Mississippi Attorney General's Office, advising the executive staff on legislative strategies, and making recommendations regarding legislative proposals. He also prosecuted parents for child neglect and abandonment in the Public Integrity Division.

Prior to the Mississippi Attorney General's Office, Elliott attended Mississippi State University where he received a bachelor's degree in industrial and systems engineering (B.A., 2007). After graduation, he was accepted into the Congressional Black Caucus Foundation - Walmart Emerging Leaders Program where he worked on Capitol Hill in Washington, D.C. for Congressman G.K. Butterfield (North Carolina - District 1). Subsequently, he attended The University of Mississippi School of Law and graduated cum laude (J.D., 2012). During law school, he was a member of the Mississippi Law Journal and Dean's Leadership Council while also serving as a Law School Student Body Senator.

Furthermore, Elliott is an active member of the Mississippi Bar Association, Jackson Young Lawyers, Magnolia Bar Association, the Charles Clark Inn of Court and Jackson Professional Group. He is an incorporator and board member of The First Tee of Central Mississippi in Jackson, MS. He is also a 2015-16 graduate of Leadership Greater Jackson and now serves on their board of directors. In addition, Elliott has been recognized as an American Cancer Society - Best Dressed Jackson honoree as a result of his community service efforts and by the Clarion Ledger as a Top Politician and Politico Under 35 in Mississippi.

Elliott and his wife, Brittany, reside in Madison, MS with their daughter, Lianne.