After the war he served as an assistant district attorney under T. Vincent Quinn, and later as deputy Queens borough president under Mario J. Cariello.[3] He succeeded his boss and was elected Queens borough president in 1969. Leviss left the office mid-term on September 17, 1971[4] to take a seat on the New York Supreme Court. He retired from the bench at the age of 76, but was subsequently named a judicial hearing officer, a position he held until his death.[3]
Leviss' wife Marion died in 2006. He was survived by two daughters, Jeanne and Nancy.[3]