After the breakup of that band in 1973, Mark found his niche as lead guitarist/arranger/right-hand man for a series of brilliant and eccentric singer/songwriters. Highlights of this period include two albums each with Andy Pratt ("Resolution" and "Shiver In The Night") and Cindy Bullens ("Desire Wire"and "Steal The Night"), and three albums with David Werner ("Whizz Kid," "Imagination Quota," and "David Werner"), along with a number of tours as lead guitarist and bandleader for these artists. Concurrent with this activity were numerous session dates as a guitarist for Daryl Hall & John Oates, Judy Collins, Leo Sayer, and many others.

The '80's saw Mark embark on many world tours and TV appearances as lead guitarist for Meat Loaf; another high point was arranging and singing the background vocals on "Straight From The Heart" by Bryan Adams. An avid interest in record production saw Mark perfecting his craft on many independent label productions, as well as major label productions for Epic and Casablanca.

A move to Boston in 1988 yielded a new career as a string arranger. After being introduced to producer Maurice Starr, Mark arranged strings for virtually all of Starr's acts, including New Kids On The Block, Rick Wes, Perfect Gentlemen, Tiffany, The Superiors, Seiko, and The Stylistics, also contributing co-production and instrumental prowess to many of these records.

A call from producer Michael Beinhorn led to Mark contributing string arrangements to The Cavedogs' major label debut on Capitol, "Soul Martini."

Next, Mark traveled to Tokyo to play keyboards and acoustic guitar for the Epic/Sony and Pioneer labels.

Mark left Boston in 1994 and currently resides in Syracuse, N.Y., where he continues to actively produce and perform on a regular basis. He has recently completed two critically acclaimed solo albums of guitar instrumentals - the moody "Guitar Noir" and the neo-psychedelic "Out of the Past." Other newer recordings include the double live CD and DVD of his “Solstice at the Cathedral,” two albums produced for old friend Andy Pratt, and a brand new collaboration with original Jukin’ Bone partner Joe Whiting, “The Truth.”

Mark’s new band, Mark Doyle and The Maniacs, have just released an album called “Shake ‘Em On Down: A Salute to the 60s British Blues Boom” and will be playing a slew of dates this Summer 2009.