"Formula Renault 3.5 always attracted me by representing an excellence in the single-seater worldwide competition," said Ferrari, who will be Spirit of Race's team principal.
"I am enthusiastic ahead of this new challenge, where I will bring long term experience and relationships gathered in decades of motor racing activities.
"The level of the series represents a great challenge for me and I will work hard to maintain the same level of performance, [in keeping with] my racing history."
"I would like to thank Mr Alguersuari and RPM for the warm welcome received, and I look forward to starting on track operations."
Alguersuari, added: "It is only four weeks since we accepted the challenge of assuming the property and the responsibility of organising in 2016 a new championship with the current Formula Renault 3.5 single-seater.
"I am proud to announce that Amato Ferrari, a true man of motorsport, has decided to link his talent and the quality of his technical and human organisation to the new project led by RPM.
"His commitment in the new team Spirit of Race guarantees the best quality standards of the new championship for highly-talented drivers and their families."
The 2015 Formula Renault 3.5 season will be notable for being the last with the French company's backing but also produced a worthy champion in Oliver Rowland. PETER MILLS evaluates this year's crop of drivers
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Landing the Fortec seat that took rising star Robin Frijns to the 2012 FR3.5 title was already a good sign for Stoffel Vandoorne. Then McLaren took him under its wing. Peter Mills tells Vandoorne's story so far