[4] In 1915, Losh spoke at the first meeting of the Texas Music Teachers' Association in Dallas, and was elected to its executive board along with fellow Fort Worth musicians E. Clyde Whitlock and Andrew Hemphill.

[13][14] Losh led similar singing programs at other local military installations, including Love Field and Camp John Dick in Dallas.

[17][18] Losh's singalong success in Fort Worth and at army camps led to larger events, some with attendance as high as 8,000, as well as singing engagements in at Texas Christian University, chambers of commerce, movie theaters, club meetings, and local department stores.

[19][20][21] In 1921, he became the director of the Trinity Episcopal Church choir;[22] in 1922 he began a long-running series of performances broadcast nationally on Fort Worth's WBAP radio.

[23] His leadership of the Fort Worth Municipal Opera was widely praised, although short-lived as local productions ceased in 1929 due to the Great Depression.

He also led the Moslah Shrine Chanters, a choir composed of Fort Worth Shriners,[33] and served as president of the local Lions Club.

After suffering two heart attacks in rapid succession, Losh died at home on June 3, 1943[2][36] and was buried at Mount Olivet Cemetery in Fort Worth.