|Date of birth||18 June 1960|
|Place of birth||Bacău, Romania|
|2008||Uganda Revenue Authority|
|2014||King Faisal Babes|
He began his coaching career in his native Romania where he managed lower league sides Minerul Comănești, Baia Mare and Midia Năvodari.
In qualification for the 2008 Africa Cup of Nations, under the guidance of Marin, Eritrea finished second behind Angola, failing to qualify for the final tournament. However they beat Kenya twice and drew at home to Angola. The Eritrea side were primarily made up of local players compared to Kenya who had at least seven foreign-based footballers playing their trade in Europe. Eritrea registered massive improvement in the FIFA rankings during his tenure climbing 56 positions, from position 177 in June 2006 to 121 in July 2007.
In December 2007, Marin signed with newly promoted Ugandan Super League side Nalubaale FC. His contract was cancelled on 30 September 2008 due to the financial difficulties of the club. Marin then took control of Uganda Revenue Authority in January 2008.
In 2009, he moved to Oman managing Al-Nasr for two years before returning to Syria, where he was appointed as the new head coach of Tishreen in 2011. Unfortunately, he left the club because of the Syrian Civil War.
In January 2014, it was announced that Marin took over as coach of Ghanaian side King Faisal Babes. After Kind Faisal Babes did not pay Marin's salaries for three consecutive months in the end of 2014, he left the club. Shortly after he was one of four coaches that were shortlisted to become the new head coach of the Egypt national team 
In May 2017, Marin was unveiled as the new head coach of Kenyan club Leopards, thus leaving his former club Tishreen (whom he led to a second-place finish in the 2016–17 Syrian Premier League). In June, after only two matches in charge he left after a disagreement with the club's leadership.
- Viorel Dobran (3 September 2007). "Peripetiile unui roman in Eritreea". 9am.ro (in Romanian). Retrieved 26 February 2009.
- "Marin Dorian vrea să scape de războiul din Siria" (in Romanian). Impartialdebacau.ro. 16 August 2012. Archived from the original on 29 March 2014. Retrieved 18 August 2012.
- "Eritrea & Burkinabe join African elite". FIFA.com. 11 December 2006. Retrieved 4 December 2012.
- "Zambia Under-17 lose to Eritrea in Togo Championship qualifier". People's Daily Online. 11 December 2006. Retrieved 5 December 2012.
- "Marin: Ingwe need sharp claws" (PDF). The Standard. Retrieved 10 June 2017.
- Jeff Kinyanjui (22 August 2012). "Romanian coach expresses interest in Sofa job". Futaa.com. Retrieved 15 March 2013.
- "Uganda: Nalubaale's Romanian Coach in Saturday". AllAfrica.com. 5 December 2007. Retrieved 19 August 2008.
- "I Can't Wait for URA - Dorian Marin". AllAfrica.com. 14 January 2008. Retrieved 1 January 2011.
- "Românul Dorian Marin a revoluționat Eritrea". Evenimentul Zilei (in Romanian). 8 February 2015. Retrieved 10 February 2015.
- Oluwashina Okeleji (30 December 2010). "Heartland move to replace Siasia". BBC Sport. Retrieved 1 January 2011.
- Maureen Abotsi (29 January 2014). "Alhaji Grunsa Signs Romanian Coach Dorian For King Faisal". Ghananation.com. Archived from the original on 1 March 2014. Retrieved 30 January 2014.
- "وكيل لاعبين "مصري – إيطالي" يكشف لـ "الأخبار" البوسني "سليسكوفيتش" الأقرب لتدريب المنتخب" (in Arabic). Akhbarelyom.com. 31 December 2014. Retrieved 9 May 2016.
- AFC Leopards name Romanian coach to replace Stewart Hall‚ goal.com, 31 May 2017
- Vincent Opiyo (20 June 2017). "AFC Leopards can still 'win trophies' this season, says Marin". Daily Nation. Retrieved 21 June 2017.
- Timothy Olobulu (5 July 2017). "Matano returns as AFC Leopards head coach". Capital FM. Retrieved 6 July 2017.
- "Exit Marin: Leopards Coach Musical Chairs On Again". sportpesanews.com. 22 June 2017. Retrieved 23 June 2017.
- Rose Welimo (20 June 2017). "AFC Leopards sacks coach Marin". Kenya Broadcasting Corporation. Retrieved 21 June 2017.