Patrick Cadigan is a real-estate investor and former chief executive of the Electronic Engineering Company of California. Tandra Cadigan is a physician. The Cadigans pledged $15-million to Boston College for a new alumni center, and they committed $12-million to Boston College High School to build a new arts and recreation center. Mr. Cadigan graduated from the high school in 1952 and from Boston College in 1957. He went on to receive an MBA from Boston University, a degree from Harvard University’s Advanced Management Program, and a master’s degree and PhD from Claremont Graduate University, where he studied under the late, renowned business philosopher Peter Drucker. After his wife, Barbara, was diagnosed with terminal cancer, Pat retired from EECO and later served as chairman and CEO of several public companies. He was also a longstanding investor in Orange County’s real estate market for 40 years, which was his primary focus following his retirement.