Very early, Mannette developed a passion for metal and tools for metalworking. He engaged himself in the evolution of the phenomenon of sounding steel. From the middle of the 1930s, percussion bands of different quarters of Port-of-Spain were in competition with each other. Legend says that Mannette was the first person to use a discarded oil barrel to build a steel pan.
In 1951, TASPO (Trinidad All Steel percussion Orchestra) travelled to Great Britain to present the new musical instrument at the Festival of Britain. Mannette was a member and tuner for this orchestra, which consisted of leader figures of different Trinidadian steel bands.
After having visited the United States in the beginning of the 1960s to build up the U.S. Navy Steel Band, he was invited to New York City to build instruments for an inner city youth program. This invitation had been carried out by Murray Narell, a New York social worker and father of Jeff and Andy Narell. At this time, Mannette tuned his instruments by ear. Eventually he learned about the necessity of concert pitch A440Hz and the use of strobe tuners.
Since 1967 Mannette has been building up several hundred steel bands all over the United States, mainly in colleges and universities, but also for private institutions. 1991, he was invited by West Virginia University to show interested students how to build and play steel pans. What was meant to be a guest-semester eventually turned into a long time relationship called the University Tuning Project and later on the company Mannette Steel Drums.
Quote of Elliot Mannette:"Looking back more than half a century during my humble beginnings in this unique art form, no one during that period could have envisioned the rapid growth of this instrument. Through the years as I developed my skills, my entire mindset was sharing my knowledge with others for the betterment of this instrument."
Mannette is credited with several innovations which have proven to be essential for the evolution of steel pan. He’s been the first to use a 55-gallon oil barrel instead of biscuit tins or soap boxes. Furthermore, Mannette was the person to sink the top of the drum into a concave shape, thus having more space to place notes as well as achieving a better isolation between the different pitches. Ellie Mannette has developed many instruments of the steel pan family. His use of the whole tone scale on two resonance bodies has become a widely common standard.
Mannette has developed his own unique skills and style over many years. Within the University Tuning Project at West Virginia University in Morgantown, West Virginia, USA, he passes on his knowledge of pan building and tuning to many students and therefore ensures that his experience is passed on to future generations of pan makers. His creations can be admired in many museums and galleries including the Smithsonian Institution, the Metropolitan Museum of Art, and the Contemporary art gallery in New York.
In 1969, Ellie Mannette was awarded the Hummingbird Medal Silver of Trinidad and Tobago for his innovations in pan making. For more than 30 years, Mannette has been at the forefront of the steel band movement in the United States. In recognition of his significant contribution to this thriving art form, Mannette received the 1999 NEA National Heritage Fellowship Award, the highest honor for the traditional arts given in the United States. Also in November 2000, Mannette received an Honorary Doctorate from the University of the West Indies and returned home to Trinidad, after a 33 year absence, to receive it. Furthermore, the same year he received the Chaconia Medal Silver from his home country, for his outstanding cultural achievement. In 2003, Ellie Mannette was admitted to the Hall of Fame of the Percussive Arts Society of the United States.
Mannette is an honorary brother of the Omicron Chapter of Kappa Kappa Psi at West Virginia University. He was initiated into the fraternity on February 13, 1997.