Lamb co-wrote the Hush's music with guitarist Les Gock. He was one of Australia's better known front men of the 1970s, along with Bon Scott. On the passing of Scott, Lamb was considered as a replacement. Lamb lived for performing and was heartbroken when Hush split up. He went on to produce the work of bands Airport, Larry, and the Keith Lamb Band, but none had the commercial success of Hush. He also produced the albums Pioneers (platinum) and "Jesus Christ Superstar Choir Sing Carols". Lamb has mentored and supported many up-coming artists, including Sharon O'Neill. He appeared in the Australian musical "Jesus Christ Superstar", as Anas the Priest.
Lamb has also written songs for other artists, including top ten hits for Status Quo with "Ol' Rag Blues", "Over the Edge" and "I Want the World to Know".
Lamb performs at solo gigs, such as the Lifeline Concert in Cairns. He remains involved creatively with music, art and sculpture and is a partner in the embroidery company Rajmahal. He has two children and five grandchilden. Lamb is also the co-author of the game, The Art of Conversation.
He lives in Bendigo, Victoria.