Samuel Cochran Phillips (19 February 1921 – 31 January 1990) was a United States Air Force general who served as Director of NASA's Apollo program from 1964 to 1969, as commander of the Space and Missile Systems Organization (SAMSO) from 1969 to 1972, as the seventh Director of the National Security Agency from 1972 to 1973, and as commander of the Air Force Systems Command from 1973 to 1975.

A 1942 graduate of the University of Wyoming, Phillips was commissioned in the Army through the Reserve Officers Training Corps. He transferred to the Army Air Corps, qualified as a fighter pilot, and flew two tours of duty in World War II with the Eighth Air Force's 364th Fighter Group. After the war he was an electronics officer during Operation Greenhouse nuclear weapon tests at Eniwetok Atoll, and served in project officer assignments with the Boeing B-52 Stratofortress heavy bomber, AIM-4 Falcon air-to-air missile, and Bomarc surface-to-air missile programs. He helped negotiate the agreement with the United Kingdom for the deployment and use of the American Thor nuclear-armed intermediate-range ballistic missiles. In 1958, he was assigned to the Air Force Ballistic Missile Division of the Air Research and Development Command, as the Director of the Minuteman Intercontinental Ballistic Missile (ICBM) Program. As such, he oversaw the first deployments of Minuteman missiles in 1962.

In 1964, Phillips was seconded to NASA as the director of the Apollo program. He brought in Air Force personnel to fill project management positions, and instituted common procedures, documentation and terminology, to prevent potentially catastrophic failures and oversights. An Apollo Configuration Management Manual was issued in 1964, which was largely copied from the Air Force Systems Command's manual. Phillips proposed a system of design reviews and change control that would give managers both the authority and the information necessary to manage the project. Daily reports were sent to headquarters, where they were kept by a central control room he modeled on the one that he had used on the Minuteman project. The Apollo program's mission was accomplished in July 1969 with the Apollo 11 Moon landing, and Phillips returned to the Air Force.

Early years and education Phillips was born on 19 February 1921 in Springerville, Arizona, where his father was an electrician, and his mother was a schoolteacher. He was the oldest of six children; he had three brothers and two sisters. He attended public schools in Denver, Colorado, and Cheyenne, Wyoming, where he graduated from Cheyenne High School in 1938. He was interested in electricity and electrical equipment, and acquired an amateur radio license. There was a Civil Aeronautics Authority radio station at the airport, which was not far from Cheyenne High School, and Phillips learned about radio and aviation there. He secured a scholarship to the University of Wyoming, where he earned a Bachelor of Science degree in electrical engineering in 1942. He was a member of Kappa Sigma fraternity. During his summer break in 1941, he earned his private pilot license.

Military service On graduation from the University of Wyoming, where the Reserve Officers Training Corps (ROTC) was compulsory, Phillips was commissioned as a second lieutenant in the infantry. He sat a competitive examination for a regular commission, and was accepted. By the time he graduated, the United States had entered World War II. He then entered active military service, and in June 1942 went to Fort Benning, Georgia, where he received infantry officer training. He transferred to the Army Air Corps, attended flying school and earned his pilot wings. He married Betty Anne Brown, who was also from Cheyenne, at Fort Benning in August 1942. They had three daughters: Dana, Janie, and Kathleen.

Phillips was given basic flight training in PT-17 biplanes by civilian instructors at Rankin Field in Tulare, California, and then at Lemoore Army Airfield in Lemoore, California in PT-15 biplanes. This was followed by advanced training at Williams Army Airfield in Arizona in the P-322, a training version of the Lockheed P-38 Lightning. He was then assigned to the 364th Fighter Group, which was successively based at Glendale Airport, Van Nuys Airport, Ontario Army Airfield and Santa Maria Army Air Field in California, before moving to the UK, where it was based at RAF Honington as part of the Eighth Air Force. The 364th Fighter Group converted to the North American P-51 Mustang in the summer of 1944. The group's main role was escorting Boeing B-17 Flying Fortress bombers on long-range bombing missions. Phillips completed two combat tours of duty in the European Theater of Operations. He was awarded the Distinguished Flying Cross with an oak leaf cluster, Air Medal with seven oak leaf clusters, and the French Croix de Guerre.

After the war, Phillips was assigned to the European Theater headquarters in Frankfurt, West Germany, where he served on the G-1 staff, which was responsible for personnel, and was headed by Major General James M. Brevans. In July 1947, he was transferred to Langley Air Force Base, Virginia. Phillips's research and development assignments included six years with the Engineering Division at Wright-Patterson Air Force Base, Ohio; duty as an electronics officer with the nuclear weapons experiments at Eniwetok Atoll during Operation Greenhouse; and in project officer assignments with the Boeing B-52 Stratofortress heavy bomber, the AIM-4 Falcon air-to-air missile, and the Bomarc surface-to-air missile programs. He earned a Master of Science degree in electrical engineering from the University of Michigan in 1950.

Phillips returned to England in 1956, where he served with the 7th Air Division of the Strategic Air Command. He participated in the negotiation of the agreement with the United Kingdom for the deployment and use of the American Thor nuclear-armed intermediate-range ballistic missile (IRBM), which earned him the Legion of Merit. He returned to the United States in 1958, and was assigned to the Air Force Ballistic Missile Division of the Air Research and Development Command, in Los Angeles, California, as the Director of the Minuteman Intercontinental Ballistic Missile (ICBM) program. He was promoted to brigadier general in April 1961. This made him the youngest general officer in the US armed forces at the time.

In July 1960, Phillips froze the design of Minuteman, precluding further design changes, even though he knew that its range was short of its specified requirement. It was estimated that it would take between six months and a year of further development to achieve this. Given a choice between meeting the specification and meeting the schedule, he chose the latter. In 1962, the first Minuteman missiles were based at Malmstrom Air Force Base in Montana, from whence they could still reach their targets even with the reduced range. The increased range was achieved in time for the second Minuteman wing to be equipped with the longer-range version. He also decided, on his own authority, to install field maintenance points on the missile so maintenance could be performed in the field. This was contrary to the original design, but based on his experience with the B-52, Phillips believed that it was necessary.

NASA service

In 1963, George E. Mueller, NASA's incoming Associate Administrator for Manned Space Flight, was confronted by projects with large cost overruns and scheduling slippages that threatened the Apollo program's goal of putting a man on the Moon by the end of the decade. Congress accepted that this would be very expensive, and was willing to pay the price to win the Space race, but took a dim view of repeated requests for additional funding simply because of NASA's poor forecasting. Mueller thought this was due to poor management skills; NASA had expanded rapidly, and its engineers had not worked on projects as large as Apollo. Mueller had worked for Ramo-Wooldridge on the Minuteman project, and he was aware of how Phillips had managed its schedule and costs, although they had not worked together. Mueller asked the head of the Air Force Systems Command (AFSC), General Bernard Schriever, if Phillips could be seconded to NASA as the program controller in the Office of Manned Space Flight (OMSF). Although Schriever was reluctant to part with one of his top ICBM project managers, he considered that the Air Force's Dyna-Soar and Manned Orbiting Laboratory programs could benefit from NASA experience. He agreed to Phillips's secondment to NASA, but only on the condition that Phillips was hired as the director of the Apollo program rather than as a mere underling. In December 1963, this was accomplished, and Phillips was assigned to NASA.

The following month, Phillips wrote to Schriever requesting that Air Force personnel be provided to fill program control positions in the OMSF. The AFSC sent two officers. Phillips then asked for 55 more. Such a large request prompted negotiations between NASA and the Air Force. The United States Secretary of the Air Force, Eugene M. Zuckert, agreed to consider the request, subject to NASA providing position statements so that he could ensure that the work would benefit their careers. The Air Force agreed that it would provide officers for tours of duty lasting at least three years. Phillips ultimately requested and received the assignment of 128 more officers, most of whom were based at the Manned Spacecraft Center (MSC) in Houston, Texas. The officers assigned included Brigadier General David M. Jones, who became his deputy; Colonel Edmund F. O'Connor, as director of MSFC Industrial Operations; Colonel Samuel Yarchin, who became the deputy director of the Saturn V Project Office; and Colonel Carroll H. Bolender, who became the Apollo mission director. Phillips was promoted to the rank of major general in February 1964.

Phillips aggressively took on the job with constant daily meetings, phone contact, and visits to contractor sites which kept him on the road 75 per cent of the time. He described the job to New York Times reporter John Noble Wilford this way:

Through the institution of common procedures, documentation and terminology, Phillips hoped to prevent potentially catastrophic failures and oversights, and to head off criticism from the media, Congress and the Government Accountability Office. An important step was the issuance of the Apollo Configuration Management Manual in 1964, which was largely copied from the AFSC's manual. Phillips proposed a system of design reviews and change control that would give managers both the authority and the information necessary to manage the project. Daily reports were sent to headquarters, where they were kept by a central control room he modeled on the one that he had used on the Minuteman project.

In November 1965, Phillips personally took a tiger team to North American Aviation (NAA) in Downey, California, the prime contractor for the Apollo Command/Service Module (CSM) and the Saturn V's S-II second stage, to investigate problems of delays, quality shortfalls and cost overruns. On 19 December, he wrote a memo to NAA president Lee Atwood with a copy of a report of his findings and some recommended fixes, which he also sent to Mueller. Mueller also sent Atwood a follow-on letter strongly expressing his disappointment with the CSM and S-II problems, requiring a response by the end of January 1966 and a follow-on visit of Phillips's team in March. Phillips privately wrote to Mueller recommending that the president of NAA's Space and Information Systems Division, Harrison Storms, be replaced. Atwood brought Robert Greer, a retired Air Force major general, in to manage the S-II project at NAA.