[1] In July 1969, it was reported that Erwin, then residing in Boston with his wife, would travel to Saigon towards the end of October "to work for the Joint U.S. Public Affairs Office".
[2] In 1973, Governor Dolph Briscoe named Erwin director of the Office of State-Federal Relations, in Washington, D.C..[2][4] In August 1975, Governor Briscoe named Erwin to the newly established Public Utility Commission of Texas, along with George Cowden and William Garrett Morris.
[1] Erwin then returned to private practice, and in the 1982 election helped gubernatorial candidate Mark White to "draft his utility reform program", and also "filmed TV spots during White's campaign to unseat Clements", in which Erwin said that elected PUC commissioners "could help restore public confidence in regulation".
[6] After winning the election and taking office, Governor White reappointed Erwin to the PUC in 1983,[1] along with Peggy Rosson.
[1] In January 1985, he was named to a panel that investigated water quality in the Colorado River in Texas.