Since 2015 he is director of the Casa do Brasil / Brazilian Cultural Centre, as well as the Biblioteca de Estudios Latinoamericanos, both institutions functioning under the aegis of Cluj's principal University.

Since 2015 Mihaiu is director of the Casa do Brasil / Brazilian Cultural Centre, as well as of the Biblioteca de Estudios Latinoamericanos, both institutions functioning under the aegis of the Babeș-Bolyai University in Cluj.

Co-organizer, advisor, lecturer, moderator of the first Romanian edition of the World Jazz Day / April 30, 2013, Cluj; in 2015, at Mihaiu's initiative, for the first time a higher education institution in Romania – the National Music Academy in Cluj – awarded the title of Doctor Honoris Causa to a jazzologist: John Edward Hasse from the Smithsonian Institution in Washington, D.C.; in 2017 and 2018, Mihaiu was the first scholar to give jazzology lectures at Montenegro's National Academy of Music in Cetinje.

He has been published in Romania's major cultural magazines as well as publications in Portugal, Poland, Great Britain, Germany,[12] Latvia,[13] Switzerland, Russia,[14] Croatia,[15] the United States,[16] France, Brazil, Serbia, Austria, Italy, Norway,[17] Spain,[18] Moldova,[19] Hungary, Costa Rica, Montenegro,[20] Turkey, and Canada.

Mihaiu has delivered Jazzology lectures at various universities and institutes, and participated as a guest in congresses and festivals (Sweden, Portugal, Romania, Croatia, Germany, England, Austria, Spain, Lithuania, Switzerland, Serbia, Scotland, the United States,[21] France, Italy, Montenegro, Moldova, Hungary, Greece, Slovakia, Ireland, Russia, Bulgaria, Turkey, Cuba, Azerbaijan, Northern Macedonia, Belgium).

He has also given a series of lectures, recitals and documentation tours through universities and cultural institutions of the United States (New York, Philadelphia, Washington DC, San Francisco, Stanford, Boston, Chicago, New Jersey, and Berkeley).

Mihaiu is co-founder of Jazzographics, a loose-knit jazz and poetry outfit featuring different combinations of the following artists: He has performed his own poetry as a solo act, or with the Jazzographics, pianists João Paulo Esteves da Silva, Dima Belinski, Lucian Ban, violinist Alexander Balanescu, percussionist Mario Florescu, flutist Marius Gagiu, saxophonist Alex Munte, dancer Fatma Mohamed, and the group Trigon.