[2] After the war, as Frank Huntermark, he joined Elliot Lawrence's orchestra where he worked as an arranger, later competing for the role with the younger Gerry Mulligan.
[3][4] His work for Kapp Records in the late 1950s included arrangements for Roger Williams, Jane Morgan, Joe Harnell, Anita Darian, and Hoagy Carmichael,[3][4] as well as the 1958 album Great Melodies From The Motion Pictures.
[3] After leaving Kapp around 1960, Hunter worked on arrangements on labels including Everest, Chancellor, Epic, Columbia, Reprise, and RCA Victor.
Musicians and singers with whom he worked in the 1960s included Bobby Hackett, Tutti Camarata, Frankie Avalon, Robert Goulet, Georgia Gibbs, Erma Franklin, Anita Bryant, Ed Ames, Pat Boone, Leo Diamond, Ketty Lester, Della Reese, Gloria Lynne, and Chad and Jeremy.
[3][4][5] He also contributed to a series of box sets for Columbia, presenting arrangements of the past year's pop music hits.