McCasland grew up in an Air Force family, the son of Lieutenant William H. and Robin (née Chambless) McCasland. His father was killed in a flying accident when he was young, and his mother eventually remarried another airman, Lieutenant William R. Casey.[3]
After graduate school, McCasland served in the Payload Systems Division with the Secretary of the Air Force Office of Special Projects-6 and 8 at Los Angeles Air Force Base, California until 1985, when he returned to MIT for a doctorate. After graduation, he returned to Los Angeles AFB as assistant director of the Office of Special Projects-13. As a lieutenant, McCasland reportedly stood out among his peers, becoming one of just a handful of lower officers given large program leadership responsibilities for highly classified development units within what became the birth of Air Force satellite reconnaissance as it exists today.[5]
In 1992, he moved to Buckley Air Force Base, Colorado, serving as director of mission planning for the Aerospace Data Facility through 1994. After a hiatus in 1995 to attend Air War College, he returned to Buckley to command the operations squadron at the ADF through 1997.[1]
After Buckley, he returned to Los Angeles AFB, spending three years as the Chief Engineer of the Navstar GPS Joint Program Office, the controlling authority for the Global Positioning System for government, commercial, and consumer applications.[6] In 2000 he took control of the Space Based Laser Project Office at LA AFB as Systems Program Director,[7] before moving to Kirtland Air Force Base, New Mexico a year later to begin a three-year stint as materiel wing director, Air Force Research Laboratory Space Vehicles Directorate, and commander of the Phillips Research Site.[1] Several of these postings involved close work with the National Reconnaissance Office.[4] In 2004 McCasland became vice commander of the Ogden Air Logistics Center, a facility attached to Hill Air Force Base, Utah, spending a year leading operations before returning yet again to LA AFB as vice commander of the Space and Missile Systems Center.
In 2007, McCasland was assigned to the Pentagon as director of space acquisition within the Office of the Under Secretary of the Air Force. In 2009 he was promoted to director of special programs within the Office of the Under Secretary of Defense for Acquisition, Technology and Logistics.[1] Serving as director of special programs also made McCasland executive secretary for the Special Access Program Oversight Committee (SAPOC), in charge of the oversight and review body with full purview of all of America's most sensitive and secretive knowledge, capabilities, and programs.[8][9]
In May 2011, McCasland left Washington for his final posting, assuming command of Air Force Research Laboratory at Wright-Patterson Air Force Base, Ohio, a position he held until his retirement in October 2013.[1] At AFRL, he led billions of dollars in advanced materials sciences and future weapons research across one of the largest scientific centers in the Department of Defense.[1]
In June 2019, McCasland joined the board of trustees for Riverside Research, a not-for-profit "chartered to advance scientific research for the benefit of the United States government and in the public interest".[15][16]
Podesta's involvement in UFO disclosure initiatives is well documented throughout his service in both the Clinton and Obama administrations; DeLonge led To The Stars, a nonprofit associated with the UFO disclosure movement.[17] The pair's collaboration on seemingly fringe science led some to speculate that public officials like McCasland were manipulating DeLonge into developing a UFO cover story for new classified American defense technology of a terrestrial origin.[22][23][24] Other speculation focused on a relationship between McCasland and Michael Duggin, an Australian-American scientist with AFRL at Kirtland Air Force Base, New Mexico who spent years of his Air Force career in research on UFO phenomena.[24] Duggin was an assistant to J. Allen Hynek, an astronomer who led the Air Force's infamous Project Blue Book, one of the first investigations of reported encounters with UFOs by the United States Government.[24]