Since 1997 he has been the head of Antonini Law Firm, in Rome, where he carries out his professional activity, eminently in the field of labour and trade union law, assisting companies, including corporations and/or foreign companies, companies and other bodies operating in the banking, financial, industrial, commercial, construction, transport, IT and other sectors.

He has lectured on labour and trade union matters, participating in various conferences at IPSOA – Business School; ANIP School – Unione Industriali di Torino; I.S.V.A.P.; CISL.

He is a member of AGI – Avvocati Giuslavoristi Italiani – since 2011, and is currently a member of the Regional Executive Council at the Lazio Territorial Section.

He is the labour law representative of numerous law firms in Rome engaged in the fields of civil, administrative, criminal and tax law.