Background
Hemminghaus, Roger Roy was born on August 27, 1936 in St. Louis. Son of Roy Geroge and Henrietta Engineer of Mines (Knacht) Hemminghaus.
chemical engineer energy company executive
Hemminghaus, Roger Roy was born on August 27, 1936 in St. Louis. Son of Roy Geroge and Henrietta Engineer of Mines (Knacht) Hemminghaus.
Student, Purdue University, 1956. Bachelor of Science in Chemical Engineering, Auburn University, 1958. Graduate certified, Bettis Reactor Engineering, Pittsburgh, 1959.
Postgraduate, Louisiana State University, 1966.
Various technical and management positions, Exxon Company United States of America, Baton Rouge, 1962-1966; various technical and management positions, Exxon Company United States of America, Benicia, California, 1967-1970; various technical and management positions, Exxon Company United States of America, Houston, 1970-1976; refinery general manager, C.F. Industries, East Chicago, Indiana, 1976-1977; president, Petro United Inc., Houston, 1977-1980; vice president planning, United Gas Pipe Line, Houston, 1980-1982; vice president planning, United Energy Resources, Houston, 1982-1984; vice president corporation planning and development, Diamond Shamrock Corporation (name changed to Maxus Energy Corporation, 1987), Dallas, 1984-1985; past executive vice president, Diamond Shamrock Corporation (name changed to Maxus Energy Corporation, 1987), Dallas president, Diamond Shamrock Refining & Marketing, San Antonio, since 1985; now chairman, chief Executive officer, Ultra Mar Diamond Shamrock, Inc., San Antonio. Director InterFirst Bank, San Antonio.
Adviser Junior Achievement, Baton Rouge, 1956-1966. President congregation Lutheran Church, Baton Rouge, 1965, Moraga, California, 1969. Chairman industrial division United Crusade, Solano County, California, 1970.
Associate general chairman United Way, Texas Gulf Coast, 1983-1984. Served to lieutenant United States Navy, 1958-1962. Member American Chemical Society, American Institute Chemical Engineers, Naval Architects and Marine Engineers, American Petroleum Institute, San Antonio Chamber of C. (director), Tau Beta Pi, Phi Lambda Upsilon, Phi Kappa Phi, Kappa Alpha Clubs: Fair Oaks Country.
Plaza, Petroleum (San Antonio).
Children: Sheryl Ann, Susan Lynn, Sally Ann. Married Dorotyh O'Kelly, August 18, 1979. Children: R. Patrick, Kelley Elizabeth, Roger Christian.