Question: Colleen Barrett joined Southwest Airlines in 1978, after working as executive assistant to a man with what title at Southwest Airlines?

Context paragraphs:
AirTran Airways: AirTran Airways was an American low-cost airline headquartered originally in Orlando, Florida, then in Dallas, Texas, after its acquisition by Southwest Airlines, into which it was integrated.  AirTran operated nearly 700 daily flights, primarily in the eastern and midwestern United States, with its principal hub at Hartsfield-Jackson Atlanta International Airport where it operated nearly 200 daily departures.  AirTran's fleet consisted of Boeing 717-200 aircraft, of which it was the world's largest operator, and Boeing 737-700 aircraft.  It was fully integrated into Southwest Airlines on December 28, 2014.

Southwest Airlines Flight 812: Southwest Airlines Flight 812 (SWA812, WN812) was a passenger flight which suffered rapid depressurization at 34400 ft near Yuma, Arizona, leading to an emergency landing at Yuma International Airport, on April 1, 2011.  The incident caused minor injuries to two of the 123 aboard.  The aircraft involved, a Boeing 737–300, was operating Southwest Airlines' domestic scheduled service from Phoenix Sky Harbor International Airport, Phoenix, Arizona, to Sacramento International Airport, Sacramento, California.

Southwest Airlines Flight 1248: Southwest Airlines Flight 1248 (WN1248, SWA1248) was a scheduled passenger flight from Baltimore-Washington International Airport, in Baltimore, Maryland, to Chicago Midway International Airport, in Chicago, Illinois, to Salt Lake City International Airport in Salt Lake City, Utah, and then to McCarran International Airport in Las Vegas, Nevada.  On December 8, 2005, the airplane slid off a runway at Chicago-Midway while landing in a snowstorm and crashed into automobile traffic, killing six-year-old Joshua Woods.  This is the first, and so far, only accident involving Southwest Airlines to result in a fatality.  It is also the first accident involving the airline to result in the death of someone not on the plane itself.

Colleen Barrett: Colleen Barrett (born 14 September 1944, Bellows Falls, Vermont) is the President Emerita and Corporate Secretary of Southwest Airlines.  She joined Southwest in 1978, having previously worked for several years as founder Herb Kelleher's executive assistant at his law firm.  She has served as Secretary of the Corporation, as Vice President Administration from 1986 through 1990, and Executive Vice President from 1990 through 2001.  Barrett has been consistently named and recognized as one of the most powerful American businesswomen.  In October, 2007, she received the "Tony Jannus Award" for distinguished achievement in commercial air transportation.

Craig Barrett (chief executive): Craig R. Barrett (born August 29, 1939) is an American business executive who served as the chairman of the board of Intel Corporation until May 2009.  He became CEO of Intel in 1998, a position he held for seven years.  After retiring from Intel, Barrett joined the faculty at Thunderbird School of Global Management in Glendale, Arizona.

Herb Kelleher: Herbert "Herb" David Kelleher (born March 12, 1931) is the co-founder, Chairman Emeritus and former CEO of Southwest Airlines (based in the United States).

PSA Flight 182: Pacific Southwest Airlines (PSA) Flight 182 was a Boeing 727-214 commercial airliner, registration, N533PS that collided with a private Cessna 172 light aircraft, registration, N7711G over San Diego, California, at 9:01 am on Monday, September 25, 1978.  It was Pacific Southwest Airlines' first accident involving fatalities.  The death toll of 144 made it the deadliest aircraft disaster in California history.  Until the crash of American Airlines Flight 191 eight months later, it was also the deadliest plane crash in U.S. aviation history.

China Southwest Airlines: China Southwest Airlines (CSWA, ) was an airline with its head office on the property of Shuangliu Airport in Shuangliu County, Chengdu, Sichuan, People's Republic of China.  On 28 October 2002, China Southwest Airlines was merged into Air China.

Access Now, Inc. v. Southwest Airlines Co.: Access Now, Inc. v. Southwest Airlines Co. was a decision of the United States District Court on 18 August 2002.  It concerned the nature of Title III of Americans with Disabilities Act of 1990.  The court determined that Southwest Airlines website is not a “place of public accommodation” as defined in Title III of the Americans with Disabilities Act of 1990.  The case determined that the Southwest Airlines internet website was not in violation of the Americans with Disabilities Act of 1990 as Americans with Disabilities Act (ADA) concerned with a physical existence and hence cannot govern what it is in cyberspace.  Judge Seitz also explained that the “virtual ticket counter” Southwest Airlines Co’s website was a virtual construct and hence not a “public place of accommodation” and as such “To expand the ADA to cover "virtual" spaces would be to create new rights without well-defined standards".

Southwest Airlines Flight 1763: Southwest Airlines flight 1763 was a scheduled passenger flight, operated by Southwest Airlines, from McCarran International Airport, in Paradise, Nevada, to Salt Lake City International Airport, in Salt Lake City, Utah.  On August 11, 2000, Jonathan Burton, a Las Vegas resident, stormed the cockpit door of the Boeing 737 operating the flight, in an apparent case of air rage.  The 19-year-old was subdued by six to eight other passengers with such force that he died of asphyxiation.  The death was initially believed to have been a heart attack.

Supporting paragraphs: Colleen Barrett Herb Kelleher
Answer: co-founder, Chairman Emeritus and former CEO