For more than a decade Marin was closely affiliated with Performance Studies international (PSi), a worldwide association of artists and academics in the interdisciplinary field of performing arts and their studies. One of his main projects was organizing and programming – in the capacity of conference co-director with Lada Čale Feldman – the highly acclaimed 15th annual conference of Performance Studies international (Zagreb, 2009) on the original concept and creative practice of MISperformance. From 2012 to 2015 he worked as a dramaturge, principal organizer and director on a complex, innovative and dispersed PSi worldwide conference: Fluid States – Performances of UnKnowing. The conference took place in 15 locations around the world throughout 2015: Panama City; New Delhi; Addis Ababa; Omarska – Bosnia (cancelled); Long Island, Dean’s Blue Hole – Bahamas; Santorini – Greece; Amager – Copenhagen, Nuuk – Greenland, Streymoy – Faroe Islands; Cluj – Romania, Rarotonga – Cook Islands, Aomori – Tohoku, Japan; Montreal; Regina – Canada; Melbourne; Manila and across the Philippines; Biblos and Beirut – Lebanon (http://www.fluidstates.org). Marin was also one of the curators and directors of the PSi 2020 conference in Rijeka on the theme Crises of Care: Act, Respond, Engage (the event had to be cancelled due to the COVID-19 pandemic). For two terms he served on the Board of Directors of PSi, where he also fulfilled the role of Chair of PSi’s International Committee. With Peter Eckersall he founded a new PSi Working Group – Dramaturgy Performance Studies(2012).

From 2013 to 2015 Marin was a member of the initial Rijeka ECoC Committee that devised the concept and theme of Rijeka 2020 – European Capital of Culture: Port of Diversity – Migrations, Water, Labor. He intensively collaborated on the Bid Book for ECoC 2020. Once the prestigious title was awarded to the city of Rijeka, Marin worked with Rijeka 2020 – ECoC Agency in various capacities as an associate and program advisor. Under his leadership the Croatian National Theater in Rijeka was one of the principal partners of Rijeka 2020 – ECoC, responsible for most of the classical music and opera, ballet and dance, as well as drama and devised theatre program.

In fall 2014 Marin started his four-year term as an Artistic Director of the Opera Company of the Croatian National Theater in Rijeka. However, already in 2016 he was appointed General Manager and Artistic Director of the overall CNT, starting in January 2017. His initial four-year term was extended in July 2019 and is now to last until December 2024. The CNT in Rijeka historically consists of four main companies and ensembles – Croatian Drama, Opera, Ballet and Italian Drama. (illustrative season 2019/2020 teaser). During Marin’s first term Youth Theatre program, Opera Studio, International Competition for Young Opera Singers “Zinka Milanov” and RSO: Rijeka Symphony Orchestra, were launched. CNT is producing over 20 premieres of dramatic and devised theater, as well as operas, musicals, ballet and dance productions every season, along with 20 classical music programs: symphonic, chamber and educational concerts. In July 2018 Marin initiated an open-air opera festival – Summer Classics – in the ancient Roman Arena in the Istrian city of Pula.

Marin was associate professor of dramaturgy, theatre and performance studies at the Academy of Dramatic Art (Department of Dramaturgy) and Music Academy (Department of Opera singing), University of Zagreb, as well as adjunct associate professor at School of the Arts, Columbia University (Theatre MFA Program, Dramaturgy Concentration). Marin gave lectures as well as held seminars and master classes on contemporary theater theory and practice, performance studies and dramaturgy at some of the most esteemed universities and art schools around the world: from Yale School of Drama to the Stanford TAPS and USC: Roski School of Art and Design; from Victorian College of the Arts (University of Melbourne) to the School of Arts and Aesthetics at Jawaharlal Nehru University (New Delhi), and elsewhere. In 2011 he was awarded the Fulbright Scholar Postdoctoral Grant and conducted a research-project titled Dramaturgy: Shifting Concept and Practice at both Columbia University (Theatre Arts – Dramaturgy) and New York University (Performance Studies department).

Marin’s numerous publications in English, Croatian, Slovenian, Italian and other languages include authored books, collections of essays and edited thematic issues of international journals for performing arts and performance studies. With Matthew Goulish (Goat Island, Every House Has a Door), Marin co-edited special English issues of Performing Arts Journal Frakcija (Fraction): Reflections on the Process / Performance: A Reading Companion to Goat Island's ‘When will the September roses bloom?’(2004/2005). With Lada Čale Feldman he co-edited Actor as/and Author thematic issue for Fraction (2001), and MIS-performance issue for Performance Research (including a DVD On PSi#15 Shifts, co-edited with Una Bauer). His edited books include: Branko Gavella: Teorija glume – od materijala do ličnosti (Branko Gavella: Theory of Acting – from material to personality, English translation forthcoming in 2025); a collection of essays on Slovenian performance-theatre company Via Negativa titled Ne, Via Negativa 2002-2008 (2011, No, Via Negativa 2002-2008); and MISperformance, Essays on Shifting Perspectives, co-edited with Lada Čale Feldman (2014, English language, http://www.maska.si). Authored books include: Razgovori o novom kazalištu (Conversations on the New Theatre, 2007) and Izboren poraz (A Defeat Won, 2012), on the theory of new theatre in general and its peculiar history in Croatia. He is currently working on the book The Breadth and Shifts of Dramaturgy: Dramaturgical Turn.