Lucian Caste is a well known, successful local architect, who has been designing buildings for a diverse clientele since completing a degree in Architecture at Carnegie Mellon University in 1950. He is Owner and President of Lucian Caste Architects and Lucian Caste Investment Properties and Vice President of Caste Village Inc. His architectural design has ranged from liturgical and church architecture to upscale commercial buildings. Some of his work can be seen around Carnegie Mellon's campus. He led the restoration of the portico of the university's Margaret Morrison Carnegie Hall.

Caste has been dedicated to the building of excellence at Carnegie Mellon for many years. He is a founder and enthusiastic member of the Academy of Lifelong Learning, established by Carnegie Mellon's Office of Alumni Relations. He helped to build the program from its beginning. He is President Elect of the Andrew Carnegie Society. He is a member of the Al May Society, and an executive board member of the Alumni Association. He has been a strong supporter of the university's Architecture Archives.

His chosen field of study was the field he was most familiar with throughout his lifetime. His father was a developer whose construction company headquarters became the site where Caste's own thriving practice was eventually located. During his lifetime, Lucian Caste has traveled worldwide to remote destinations.

Most notable was his return in 1985 to Iwo Jima to observe the 40th anniversary memorial program for survivors of the terrible battle on that island during World War II. He was a US marine who miraculously came through the battle. (In fact, after the war and his military service, when he returned the U.S., he came to Carnegie Mellon University as a student.) His experiences at Iwo Jima prompted him to publish a commemorative for his grandson that describes the battle on Iwo Jima and his return to Japan in 1985. One of the copies of this limited edition diary is preserved in Carnegie Mellon's Hunt Library Special Collections division.