Mary Louise Sweeney Keigher, 91, a longtime resident of Los Alamos, passed away on Dec. 6, 2015. Mary Lou was born on March 11, 1924, in Mitchell, S.D. (Home of the Corn Palace).Mary was preceded in death by her beloved husband "Jamie" Don Keigher; her parents,Dr. and Mr. J.T. Sweeney; infant son Kevin in 1954; and son Brian J. Keigher in 2003.Mary was a secretary at Union Oil Co. during WWII followed by employment at Los Alamos National Laboratory as a word processor. She and Don retired in 1986. Mom once said that her greatest achievements were "marrying the right man for me and raising three independent children". She has lived in Los Angeles, Calif.; Boston, Mass.; Chicago, Ill.; Wilmington, Ill.; Richland, Wash.; Silver Spring, Md.; and currently Los Alamos.Mary Lou is survived by her two daughters Sharon Keigher of Milwaukee and Sheila Keigher Sargent and her husband Charlie Sargent of Boston Mass. She was blessed with three grandchildren: Aaron Keigher and wife Katherine; Kathleen Keigher Sargent Read and husband Dan of Jersey, U.K.; Kira Sargent and Ben Park of Boston, Mass.; and a great-grandson Henry Brian Keigher.Mass of Christian burial will be celebrated at 11:00 a.m. Dec. 15, 2015 at the Immaculate Heart of Mary Church in Los Alamos. Burial will be at a later date at Wilmington, Ill. Mary Lou's family has entrusted the care of their loved one to the DeVargas Funeral Home & Crematory of the Espanola Valley. 505-747-7477 – www.devargasfuneral.com