In 1962, Johanos became the music director and principal conductor with the Dallas Symphony Orchestra. During this period, he conducted the orchestra in several recordings of music by Copland, Ives, Rachmaninoff and other composers.[4][5] However, he had problems with the musicians during his stint in Dallas, resulting in his departure in 1970.[6]
He became the musical director and conductor of the Honolulu Symphony Orchestra in 1979. Johanos helped settle the orchestra down after the retirement of Robert la Marchina. He was also known for championing new music, which caused some frictions with the board. Johanos received an award from the American Society of Composers, Authors and Publishers in 1991 for "adventuresome programming of contemporary music".[3]
While at Honolulu, Johanos recorded with his own and other orchestras. In 1993, the Honolulu Symphony Orchestra recorded an album, Three Works by Dan Welcher with the Honolulu Symphony, under Johanos's baton. Welcher dedicated his Symphony No. 1 to Johanos. The 1993–94 season, which would have been Johanos's last with the Honolulu orchestra, was cancelled due to a labor dispute.[7]