Derrick Duane Vallance Practice Areas: BankruptcyBusiness LawEnergy, Oil & Gas LawEnvironmental Law Years of Experience: 1992 Licensed states: Texas Education: South Texas College of LawDoctor of Jurisprudence/Juris Doctor (J.D.)1990 Professional Associations: State Bar of Texas # 20435375Member1991 - Current Map No Records FoundSorry, no records were found. Please adjust your search criteria and try again. Google Map Not LoadedSorry, unable to load Google Maps API.