Born in June 1949, he lives and works in Milan in his studio in via Ponte Seveso 28. He attended the Brera Academy and graduated with honors in painting and graphics from the Istituto d'Arte Superiore of the Castello Sforzesco in Milan. Immediately included in the job, Tommasi works in the field of corporate communication (advertising, promotions, packaging, events ...) signing as art director campaigns for prestigious brands such as Alfa Romeo, Olivetti, Montedison, Bayer, ...
He coordinates with the Marconi Gallery 12 ARTISTS FOR ALFA ROMEO, publishes ALFA EFFECT together with Cerri and Intra, publishes for the Milan Triennale the catalog volume at the exhibition "Plastic materials in art on behalf of Montedison. At the same time, he continues in his pictorial path that sees him face the figurative techniques with a never banal approach, intervening on the canvas with material contributions: fabrics and laces enrich the figures, playing on the eternal alternation of reality and fiction in the artistic representation to land then to digital painting.
He participates in numerous collective and personal exhibitions receiving flattering critical and public successes.