Colin Riley McMillan was a former Assistant United States Secretary of Defense

United States Secretary of Defense

The Secretary of Defense is the head and chief executive officer of the Department of Defense of the United States of America. This position corresponds to what is generally known as a Defense Minister in other countries...

 under President

President of the United States

The President of the United States of America is the head of state and head of government of the United States. The president leads the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces....

 George H. W. Bush

George H. W. Bush

George Herbert Walker Bush is an American politician who served as the 41st President of the United States . He had previously served as the 43rd Vice President of the United States , a congressman, an ambassador, and Director of Central Intelligence.Bush was born in Milton, Massachusetts, to...

 during the Gulf War

Gulf War

The Persian Gulf War , commonly referred to as simply the Gulf War, was a war waged by a U.N.-authorized coalition force from 34 nations led by the United States, against Iraq in response to Iraq's invasion and annexation of Kuwait.The war is also known under other names, such as the First Gulf...

. He was awaiting confirmation as United States Secretary of the Navy

United States Secretary of the Navy

The Secretary of the Navy of the United States of America is the head of the Department of the Navy, a component organization of the Department of Defense...

 in 2003 when he died from an apparently self-inflicted

Suicide

Suicide is the act of intentionally causing one's own death. Suicide is often committed out of despair or attributed to some underlying mental disorder, such as depression, bipolar disorder, schizophrenia, alcoholism, or drug abuse...

 gunshot wound in the head at his New Mexico

New Mexico

New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

 ranch.

McMillan was the chairman and CEO

Chief executive officer

A chief executive officer , managing director , Executive Director for non-profit organizations, or chief executive is the highest-ranking corporate officer or administrator in charge of total management of an organization...

 of Permian Exploration Corporation, an oil

Petroleum

Petroleum or crude oil is a naturally occurring, flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights and other liquid organic compounds, that are found in geologic formations beneath the Earth's surface. Petroleum is recovered mostly through oil drilling...

 exploration company, the chairman of the First Federal Savings Bank in Roswell, New Mexico

Roswell, New Mexico

Roswell is a city in and the county seat of Chaves County in the southeastern quarter of the state of New Mexico, United States. The population was 48,366 at the 2010 census. It is a center for irrigation farming, dairying, ranching, manufacturing, distribution, and petroleum production. It is also...

, and the founder and CEO of McMillan Production Company. He was appointed in 2001 to be the chairman of the Sallie Mae Corporation by President George W. Bush

George W. Bush

George Walker Bush is an American politician who served as the 43rd President of the United States, from 2001 to 2009. Before that, he was the 46th Governor of Texas, having served from 1995 to 2000....

.

McMillan earned his bachelor's degree

Bachelor's degree

A bachelor's degree is usually an academic degree awarded for an undergraduate course or major that generally lasts for three or four years, but can range anywhere from two to six years depending on the region of the world...

 from the University of North Carolina

University of North Carolina at Chapel Hill

The University of North Carolina at Chapel Hill is a public research university located in Chapel Hill, North Carolina, United States...

 in 1957. He served in the United States Marine Corps

United States Marine Corps

The United States Marine Corps is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to deliver combined-arms task forces rapidly. It is one of seven uniformed services of the United States...

 from 1957–1960 and in the Marine Corps Reserve from 1960 - 1972.

McMillan served in the New Mexico House of Representatives

New Mexico House of Representatives

The New Mexico House of Representatives is the lower house of the New Mexico State Legislature.There are 70 members of the House. Each member represents roughly 25,980 residents of New Mexico.The Speaker of the House is Ben Luján .-Composition:...

 from 1971 through 1982. He ran for the United States Senate

United States Senate

The United States Senate is the upper house of the bicameral legislature of the United States, and together with the United States House of Representatives comprises the United States Congress. The composition and powers of the Senate are established in Article One of the U.S. Constitution. Each...

 in 1994 but lost to incumbent Democrat Jeff Bingaman

Jeff Bingaman

Jesse Francis "Jeff" Bingaman, Jr. , is the senior U.S. Senator from New Mexico and a member of the Democratic Party...

. In 2000, McMillan was the New Mexico state chairman of George W. Bush

George W. Bush

George Walker Bush is an American politician who served as the 43rd President of the United States, from 2001 to 2009. Before that, he was the 46th Governor of Texas, having served from 1995 to 2000....

's successful presidential campaign.

Colin McMillan was survived by his wife Kay and their four children and eight grandchildren.