Av. Diamante Ceci graduated with honors from the Faculty of Law at Roma La Sapienza University in 2001 and obtained her license to practice law as a member of the Rome Bar Association in 2004. Since 2016, she has been authorized to practice before the Italian Supreme Court (Corte di Cassazione).

She has extensive experience in Criminal Law, Tax Law, Criminology, and Criminal Procedure Law, with particular expertise in Corporate Crimes, White Collar Crimes, and Tax Crimes. She provides effective legal representation and strategic advisory services to her clients in complex criminal cases, including commercial fraud, breach of trust, tax evasion, forgery, money laundering, and bribery.

She is also a founding member of the Crime Consulting Association and serves as an instructor in the Criminology Seminars organized by the E-crime Association. Additionally, she is the Vice President of the Rome Branch of the Italian Women Lawyers Association (A.D.G.I.).