Laddie studied at Purdue University. In 1942 e became a Bachelor of Science in civil engineering. In 1950 he received a degree of the Master of Science in the area of engineering of Johns Hopkins University.
Laddie worked in General Electric from 1954 to 1990. He was a manager planning and resources, electronics science and engineering, corporation research and development Schenectady in New York, United States from 1974 to 1976. In this year he became a manager of electronics systems programs operations, electrical science, and engineering. He worked there until 1984.
From 1984 to 1990 he became a manager of special programs and project development operation. Since 1990 Laddie worked as a director of the technology transfer program at Data Storage Systems Center Carnegie Mellon University in Pittsburgh, United States. In 1971 he became a chairman of the advisory group at the United States Army Electronics Command. He worked there until 1974. From 1978 to 1987 he was a member of the United States Army Science Board.
United States Army , United States
1942 - 1954
Army and Navy Club , Washington
1979 - 1982
European Theatre of Operations
1954 - 1977
American Institute of Aeronautics and Astronautics
Institute of Electrical and Electronics Engineers
American Defense Preparedness Association
Tau Beta Pi
Laddie married to Thelma Mae Beasley on December 11, 1942. Children: Stephanie, Laddie L., Craig.