Fifteen years later, already a consummate virtuoso keyboardist, singer and songwriter, he formed Sugarloaf. Besides the often heard today, much praised "Green-Eyed Lady", the group found gold with "Don't Call Us, We'll Call You" in February, 1975. Life after Sugarloaf was just as artistically lucrative, with a solo album and a co-authored for Grace Jones hit "On Your Knees". He co-produced Frankie Valli's critically acclaimed album "Heaven Above Me", then was asked to join The Four Seasons for their Twentieth Anniversary Tour.

He continued to write, perform and tour as a full member for four years, supplying much needed keyboard color to the act and working hand-in-hand in the total production with Four Seasons mentor Bob Crewe. While working with The Four Seasons, Jerry also struck gold with the Roberta Flack / Peobo Bryson number "You're Lookin' Like Love To Me".
The summer of 1991 found Jerry performing as feature guest star, with the "30 Years of Rock 'N' Roll Show", before hundreds of thousands of classic rock devotees.

Dennis later went on to become an in demand musician performing with Edwin Starr, Al Wilson, Chuck Negron (Three Dog Night), Spencer Davis, Bobby Kimball (Toto), and numerous others. Dennis served as Music Director for Micky Dolenz of the Monkees, Otis Day and the Knights (National Lampoon’s Animal House; "Shout"), and several tours of The 30 Years of Rock ’N ’Roll Show.

During his tenure with 30 Years of Rock’N’Roll he became friends with Mike Pinera and Jerry Corbetta who along with Peter Rivera formed the now famous "Classic Rock All Stars".

His first million-selling gold record was for "Ride Captain Ride" which he wrote and sang with his group Blues Image. In the late 1960's, Mike joined, Iron Butterfly. The Butterfly broke all Music Industry standards by staying at the top of the charts for over 56 weeks. Their album "In A Gadda Da Vida", was the first album ever in music history to receive a Platinum Award.

During this period, Mike became one of the first Rock Artists to open a video production company. His tours with such legendary artists as Led Zeppelin, Jimi Hendrix, The Doors, Eric Clapton and The Cream and many others marked the beginning of many hours of footage to be filmed and captured for generations to come.

He then went on to play and record with Ramatam, Cactus, and Thee Image.

After recording 2 solo albums, "Isla" on Capricorn and "Forever" on Spector records, Mike later joined Alice Cooper, recording 2 albums, “Special Forces” and “Zipper Catches Flesh.” Pinera helped in composing the songs with Alice, producing the music videos, two world tours and also a National Network Special in France.

He then co-wrote, co-produced and hosted  the first anti-drug Rock Music documentary "Painscape" commissioned by The White House and still being shown today in schools.