1947
Born to David Richard Greene Clark and Ruth Marie (Merritt) Clark in Johnson City, New York.
1969
Earns a Bachelor of Arts in biology from the State University of New York (SUNY) at Binghamton.
1970
Marries Darlene Elizabeth Wombacher on August 22.
1973
Obtains a Doctor of Medicine from SUNY, Upstate Medical Center.
1976
Receives the Stewart Gurman Award from the State University of New York.
1978
Is an assistant professor of pediatrics at SUNY Health Science Center at Syracuse until 1984.
1983
Receives the Pediatrics Research Award from the American Academy of Pediatrics, of which he is a fellow.
1984
Is an associate professor of pediatrics at the New York Medical College/Westchester County Medical Center until 1988.
1988
Serves Louisiana State University as a professor of pediatrics and vice-chairman of pediatrics until 1998.
1993
Is named Physician of Year by the Parent Care Association.
1996
Receives the Seale Harris Award from the Southern Medical Association; Is an assistant scoutmaster with Boy Scouts of America New Orleans until 1998.
1996
Is a member of neo/peri medicine of the American Board of Pediatrics in Chapel Hill, NC through 2004.
1998
Serves the Albany Medical College as a professor of pediatrics and chairman of the Department of Pediatrics until retiring in 2019.
2000
Is involved with the Boy Scouts Twin River Council until 2020.
2007
Receives the American Academy of Pediatrics Special Achievement Award.
2009
Holds the Jury Elliott Memorial Lecture for the Southern Association of Neonatologists.
2018
Receives the American Academy of Pediatrics Advocacy Award.