A principal in Ogletree Deakins Governmental Affairs, Inc., a subsidiary of the law firm, Ogletree, Deakins, Nash, Smoak & Stewart, P.C., Coxson has represented business clients in oral arguments before the National Labor Relations Board and other federal agencies. He has also testified before Congress as an expert witness on various workplace issues, including most recently before House and Senate committees on the subject of genetic information discrimination in employment. Coxson is a member of a number of national trade associations and was appointed to the Employment Issues Committee of the National Conference of State Legislatures Blue Ribbon Panel on Human Genetic Technologies.