Roger Huntington Sessions (28 December 1896 – 16 March 1985) was an American composer, critic, and teacher of music.
Sessions was born in Brooklyn, New York, to a family that could trace its roots back to the American revolution. His mother, Ruth Huntington Sessions, was a direct descendent of Samuel Huntington, a signer of the Declaration of Independence.[1] Roger studied music at Harvard University from the age of 14. There he wrote for and subsequently edited the Harvard Musical Review. Graduating at age 18, he went on to study at Yale University under Horatio Parker and Ernest Bloch before teaching at Smith College. His first major compositions came while he was travelling Europe with his wife in his mid-twenties and early thirties.[citation needed]
Returning to the United States in 1933, he taught first at Princeton University (from 1936), moved to the University of California, Berkeley, where he taught from 1945 to 1953, and then returned to Princeton until retiring in 1965. He was elected a Fellow of the American Academy of Arts and Sciences in 1961.[2] He was appointed Bloch Professor at Berkeley (1966–67), and gave the Charles Eliot Norton Lectures at Harvard University in 1968–69. He continued to teach on a part-time basis at the Juilliard School from 1966 until 1983.[3]
His notable students include John Adams, Milton Babbitt, Jack Behrens, Elmer Bernstein, Robert Cogan, Robert Black, Edward T. Cone, Sir Peter Maxwell Davies, David Del Tredici, Ross Lee Finney, Alan Fletcher, Carlton Gamer, Steven Gellman, Miriam Gideon, John Harbison, Walter Hekster, Robert Helps, Andrew Imbrie, Earl Kim, Fred Lerdahl, Leon Kirchner, David Lewin, William Mayer, Conlon Nancarrow, Roger Nixon, Will Ogdon, Claire Polin, Stephen Pruslin, Einojuhani Rautavaara, William Schimmel, Richard St. Clair, Roland Trogan, George Tsontakis, John Veale, Henry Weinberg, Peter Westergaard, RolvYttrehus and Ellen TaaffeZwilich.
He died at the age of 88 in Princeton, New Jersey.

Style
His works written up to 1930 or so are more or less neoclassical in style. Those written between 1930 and 1940 are more or less tonal but harmonically complex. The works from 1946 on are atonal, and beginning with the Solo Violin Sonata of 1953, serial.

Major works
Symphony No. 1 (1927)
The Black Maskers Orchestral Suite (1928)
Piano Sonata No. 1 (1930)
Violin Concerto (1935)
String Quartet No. 1 (1936)
Duo for Violin and Piano (1942)
From my Diary (Pages from a Diary) (1940)
Piano Sonata No. 2 (1946)
Symphony No. 2 (1946)
The Trial of Lucullus (1947), one-act opera
String Quartet No. 2 (1951)
Sonata for Solo Violin (1953)
Idyll of Theocritus (1954)
Piano Concerto (1956)
Symphony No. 3 (1957)
String Quintet (1957[4] or 1957–58[3])
Symphony No. 4 (1958)
Divertimento for Orchestra (1959)
Montezuma (ca. 1940–1962,[5] 1940s–1962, orchestration finished 1963,[6] 1935–63,[3] or 1941–64[7]), opera in three acts (libretto by Giuseppe Antonio Borgese)
Symphony No. 5 (1964)
Piano Sonata No. 3 (1965)
Symphony No. 6 (1966)
Six Pieces for Violoncello (1966)
Symphony No. 7 (1967)
Symphony No. 8 (1968)
Rhapsody for Orchestra (1970)
Concerto for Violin, Violoncello, and Orchestra (1971)
When Lilacs Last in the Dooryard Bloom’d (1971)
Concertino for Chamber Orchestra (1972)
Five Pieces for Piano (1975)
Symphony No. 9 (October 1978)
Concerto for Orchestra (1981)
Duo for Violin and Violoncello (1981), incomplete
Some works received their first professional performance many years after completion. The Sixth Symphony (1966) was given its first complete performance on March 4, 1977 by the Juilliard Orchestra in New York City.[8]
The Ninth Symphony (1978), commissioned by the Syracuse Symphony Orchestra and FrederikPrausnitz, was premiered on January 17, 1980 by the same orchestra conducted by Christopher Keene.[9]

Writings 
Sessions, Roger. Harmonic Practice. New York Harcourt, Brace. 1951. LCCN 51008476.
Sessions, Roger. Reflections on the Music Life in the United States.New York Merlin Press. 1956. LCCN 56012976.
Sessions, Roger. The Musical Experience of Composer, Performer, Listener. Princeton, New Jersey Princeton University Press. 1950, republished 1958.
Sessions, Roger. Questions About Music. Cambridge Harvard University Press.1970, reprinted New York Norton, 1971. ISBN 0-674-74350-4.
Sessions, Roger. Roger Sessions on Music Collected Essays, edited by Edward T. Cone.Princeton Princeton University Press, 1979. ISBN 0-691-09126-9 (cloth) ISBN 0-691-10074-8 (pbk)