Question: What was the name of the company that the character played by Tom Burnett in "United 93" worked for?

Context paragraphs:
Christian Clemenson: Christian Dayton Clemenson (born March 17, 1958) is an American film and television actor.  He is well known for his portrayal of Jerry "Hands" Espenson in the television series "Boston Legal", for which he was nominated for three Emmy Awards and winning the 2006 Emmy Award for Outstanding Guest Actor in a Drama Series.  He has appeared in a number of highly acclaimed films, including "Hannah and Her Sisters", "Broadcast News", "Apollo 13" and "The Big Lebowski", and portrayed Tom Burnett in Paul Greengrass' "United 93".  He most recently starred in "" as prosecutor William Hodgman.

Chip Zien: Jerome Herbert "Chip" Zien (born March 20, 1947) is an American actor.  He is best known for playing the lead role of the Baker in the original Broadway production of "Into the Woods" by Stephen Sondheim.  He has appeared in all of the "Marvin Stories" musicals by William Finn: "In Trousers", "March of the Falsettos", "Falsettoland" and "Falsettos".  He played the role of Thénardier in the Broadway production of "Les Misérables" and Mark Rothenberg in the film "United 93".  He is also known for providing the voice of Howard in the film "Howard the Duck".

Southland Conference: The Southland Conference is a collegiate athletic conference which operates in the South Central United States (specifically Texas, Louisiana, and Arkansas).  It participates in the NCAA's Division I for all sports; for football, it participates in the Division I Football Championship Subdivision (FCS).  The Southland sponsors 17 sports, nine for women and eight for men, and is governed by a presidential Board of Directors and an Advisory Council of athletic and academic administrators.  Tom Burnett was named the Southland's sixth commissioner on Dec. 23, 2002.  From 1996 to 2002, for football only, the Southland Conference was known as the Southland Football League.

Clare Douglas: Elizabeth Clare Douglas (21 February 1944 – 9 July 2017) was a British film editor who received a BAFTA Award for Best Editing for the 2006 film "United 93".  Douglas worked extensively for British television, and had been nominated four times for BAFTA Television Editing Awards.

Mark Bingham: Mark Kendall Bingham (May 22, 1970 – September 11, 2001) was an American public relations executive who founded his own company, the Bingham Group.  During the September 11 attacks in 2001, he was a passenger on board United Airlines Flight 93.  Bingham was among the passengers who, along with Todd Beamer, Tom Burnett and Jeremy Glick, formed the plan to retake the plane from the hijackers, and led the effort that resulted in the crash of the plane into a field near Shanksville, Pennsylvania, thwarting the hijackers plan to crash the plane into a building in Washington, D.C., most likely either the U.S. Capitol Building or the White House.

United 93 (film): United 93 is a 2006 biographical drama-thriller film written, co-produced and directed by Paul Greengrass, that chronicles events aboard United Airlines Flight 93, which was hijacked during the September 11 attacks of 2001.  The film attempts to recount with as much veracity as possible (there is a disclaimer that some imagination had to be used) and in real time (from the flight's takeoff) what has come to be known in the United States as a critical moment.  According to the filmmakers, the film was made with the cooperation of all of the passengers' families.  The majority of the film is presented in real time.

Khalid Abdalla: Khalid Abdalla (Arabic: خالد عبد الله‎ ‎ , "Khālid ‘Abd Allāh"; born 26 October 1980) is a British Egyptian actor and activist.  He came to international prominence after starring in the 2006 Academy Award-nominated and BAFTA-winning film, "United 93".  Written and directed by Paul Greengrass, it chronicles events aboard United Airlines Flight 93, which was hijacked as part of the September 11 attacks.  Abdalla played Ziad Jarrah, the pilot and leader of the four hijackers on board the flight.  He starred as Amir in "The Kite Runner" and acted with Matt Damon in "Green Zone", his second film with director Paul Greengrass.  Abdalla appears as himself in Jehane Noujaim's documentary on the ongoing Egyptian revolution, "The Square", which won the Audience Award at Sundance Festival in 2013.

Joseph Sullivan (FBI): Joseph Aloysius Sullivan (February 17, 1917 – August 2, 2002) was a Major Case Inspector for the Federal Bureau of Investigation.  Born in Montreal, Wisconsin, he grew up in Hurley, Wisconsin.  He was involved in a number of highly publicized cases in the sixties and seventies including the assassination of Martin Luther King Jr., the murder of United Mine Workers reformer Joseph "Jock" Yablonski, the Sterling Hall bombing at the University of Wisconsin–Madison, and the Kent State shootings.  Despite his involvement in such high-profile cases, Sullivan is best known for his relentless search to track down the killers of three civil rights workers, who were brutally slain in Mississippi in 1964.  The character played by Willem Dafoe in the movie "Mississippi Burning" is loosely based on Sullivan.  According to "The FBI - A Comprehensive Referecie Guide" (1998), edited by Athan G. Theoharis, Sullivan was also the model for Inspector Lew Erskine, the lead character played by Efrem Zimbalist, Jr., on the TV series "The FBI".

Thelma Harper: Thelma Mae Harper (nee Crowley), also known as Mama, is a fictional character played by American actress Vicki Lawrence.  She is a senior citizen who has lived in an unspecified part in the Southern United States for her entire life which is evident by the southern drawl of her speech and her customs.  She is an exaggerated version of a prototype middle twentieth century lower middle class grandmother in the southern United States.  Vicki Lawrence, the actress who originated Mama, born April 14, 1949, created Mama in the mid-seventies and undoubtedly based Mama on actual grandmother figures she knew while growing up in the '50s and '60s.  Mama first appeared as a supporting character in "The Family" sketches on "The Carol Burnett Show" which aired on CBS from 1967 until 1978.  In 1982, "Eunice" was a made-for-TV movie based on "The Family" sketches characters. " Mama's Family" (first on NBC, then revolutionized in first-run syndication), and finally in the ongoing "Vicki Lawrence & Mama: A Two-Woman Show".  With Lawrence continuing to play the role into the present day, the "Mama" character has made numerous other post-television show appearances, such as on "Hollywood Squares"; "The Talk"; ""Larry the Cable Guy's Christmas Spectacular"" (2007); ""Betty White's 2nd Annual 90th Birthday"" (February 5, 2013); "The Queen Latifah Show" (May 20, 2014) etc.

Tom Burnett: Thomas Edward Burnett Jr. (May 29, 1963 – September 11, 2001) was the vice-president and chief operating officer of Thoratec Corporation, a medical devices company based in Pleasanton, California.  He resided in San Ramon, California.

Supporting paragraphs: Christian Clemenson Tom Burnett
Answer: Thoratec Corporation