After his release from prison, Grigore completed high school and started his studies in Bucharest at the Ciprian Porumbescu Music Conservatory (currently Universitatea Națională de Muzică) in 1955.
[citation needed] In 1956 he was banned from the conservatory for refusing to collaborate with the Romanian secret police Securitate, and moved back to Tulcea, where he worked as a violin teacher for six years.
[citation needed] Grigore successfully re-enrolled in conservatory in 1963, and went on to complete his studies and receive his master's degree in Composition, Conducting and Teaching in 1968.
After graduating, he became a member of the Composers' and Musicologists' Union of Romania in 1968, and worked for 20 years as a music editor for the Romanian National Radio Station in Bucharest.
On June 17, 2008 the Composer's Union of Romania honored Grigore Nica's 70th birthday at the Enescu House and Museum with a musical portrait.