Dr. Geissler is a representative for the prosecution of claims, redeterminations, reconsiderations, hearings and appeals before the Social Security Administration pursuant to applicable federal law. [Ref: (i) 8 U. S. C. § 203, 205, and 207; and 42 U. S. C. § 406 (a), 1320a-6, and 1383(d)(2); (ii) 20 CFR § 404.1700 et. seq., 408.1101, and 416.1500 et. seq.; (iv) Social Security Rulings 83-27 and 82-39; and (v) 6 U. S. C. § 6041 and 6045(f).]