Answer the question at the end by quoting:

Dafydd Rhys "Dave" Williams OC (born May 16, 1954) is a Canadian physician, public speaker and a retired CSA astronaut. Williams was a mission specialist on two space shuttle missions. His first spaceflight, STS-90 in 1998, was a 16-day mission aboard Space Shuttle Columbia dedicated to neuroscience research. His second flight, STS-118 in August 2007, was flown by Space Shuttle Endeavour to the International Space Station.
In January 1995, Williams was selected to join the 1995 international class of NASA mission specialist astronaut candidates. He reported to the Johnson Space Center in March 1995 and completed training and evaluation in May 1996. On completing basic training, he was assigned to work technical issues for the payloads/habitability branch of the astronaut office. From July 1998 to November 2002, Williams served as Director of the Space and Life Sciences directorate with responsibility for research in both physical and biomedical space sciences at the Johnson Space Center (JSC). With this appointment, he became the first non-American to hold a senior management position within NASA. Overall crew medical safety was one of his principal concerns, in addition to flight medical operations and JSC occupational and environmental health. His programs were directed toward protecting astronauts from the hazards of the space environment, including space radiation and microgravity, in addition to maintaining their medical, physical, and psychological well-being while aloft and on return to Earth. His other oversight responsibilities were in the fields of telemedicine, 3-D tissue culture/regeneration in microgravity, the curatorial management of extraterrestrial materials, and of qualifying humans for very long space journeys and ensuring their safe return to Earth. Williams served as an aquanaut on the first NEEMO (NASA Extreme Environment Mission Operations) crew aboard the Aquarius underwater laboratory in October 2001. During this mission, he was thrilled to shake hands underwater with Canadian underwater explorer Joe MacInnis. Williams was originally scheduled to command NEEMO 7 in October 2004, but was replaced by back-up crewmember and fellow CSA astronaut Robert Thirsk due to Williams undergoing review of a temporary medical issue. In April 2006, Williams commanded the NEEMO 9 mission. During this eighteen-day mission, the six-person crew developed lunar surface exploration procedures and telemedical technology applications.

did he do anything else for NASA?

Williams served as Director of the Space and Life Sciences directorate

Answer the question at the end by quoting:

Ellington was born on April 29, 1899, to James Edward Ellington and Daisy (Kennedy) Ellington in Washington, D.C. Both his parents were pianists. Daisy primarily played parlor songs and James preferred operatic arias.
When his drummer Sonny Greer was invited to join the Wilber Sweatman Orchestra in New York City, Ellington made the fateful decision to leave behind his successful career in Washington, D.C., and move to Harlem, ultimately becoming part of the Harlem Renaissance. New dance crazes such as the Charleston emerged in Harlem, as well as African-American musical theater, including Eubie Blake's Shuffle Along. After the young musicians left the Sweatman Orchestra to strike out on their own, they found an emerging jazz scene that was highly competitive and hard to crack. They hustled pool by day and played whatever gigs they could find. The young band met stride pianist Willie "The Lion" Smith, who introduced them to the scene and gave them some money. They played at rent-house parties for income. After a few months, the young musicians returned to Washington, D.C., feeling discouraged. In June 1923, a gig in Atlantic City, New Jersey, led to a play date at the prestigious Exclusive Club in Harlem. This was followed in September 1923 by a move to the Hollywood Club - 49th and Broadway - and a four-year engagement, which gave Ellington a solid artistic base. He was known to play the bugle at the end of each performance. The group was initially called Elmer Snowden and his Black Sox Orchestra and had seven members, including trumpeter James "Bubber" Miley. They renamed themselves The Washingtonians. Snowden left the group in early 1924 and Ellington took over as bandleader. After a fire, the club was re-opened as the Club Kentucky (often referred to as the Kentucky Club). Ellington made eight records in 1924, receiving composing credit on three including "Choo Choo". In 1925, Ellington contributed four songs to Chocolate Kiddies starring Lottie Gee and Adelaide Hall, an all-African-American revue which introduced European audiences to African-American styles and performers. Duke Ellington and his Kentucky Club Orchestra grew to a group of ten players; they developed their own sound by displaying the non-traditional expression of Ellington's arrangements, the street rhythms of Harlem, and the exotic-sounding trombone growls and wah-wahs, high-squealing trumpets, and sultry saxophone blues licks of the band members. For a short time soprano saxophonist Sidney Bechet played with them, imparting his propulsive swing and superior musicianship to the young band members.

Did any person aid him in his early career?
Ellington made the fateful decision to leave behind his successful career in Washington, D.C., and move to Harlem, ultimately becoming part of the Harlem Renaissance.