Barry J. Walker was born in Atlanta , Georgia , USA , on December 23rd, 1951 and is admitted to practice in the state of Mississippi . Mr. Walker has been a practicing attorney since 1979. Since 1992, his practice has been concentrated in employment-based nonimmigrant and immigrant cases. He practices before the US Department of Labor, US Immigration Service, and US State Department. He represents employers and employees in the processing of H-1B specialty occupations, O-1 visas for persons with Extraordinary Ability, L-1 intracompany transfer, E-1/E-2 treaty trader and treaty investor nonimmigrant visa cases. He regularly represents health care facilities and foreign medical graduates in J-1 waiver cases.