TV journalist, presenter, producer, film promoter, writer.
1993 graduated from Kaunas University of Applied Sciences, Faculty of Humanities.
In 1994 he started to work in the Kaunas editorial office of Lithuanian Television, producing the programmes "The Seventh Continent" (1994), "Atsargiai - reklama!" In 1996 he moved to LNK television, where he was one of the presenters and editors of the programme "Ryto ratas" (Morning Circle) until 1997, and later he created and hosted the programmes "Lankos" (until 2000) and "Snobo kinas" (until 2009). He wrote scripts for special LNK TV projects (until 2010), for the shows "Frontas" (2002-2003), "Dviračio kabaretas" (2004-2005), "Dviračio žynios" (2003-2006), "Dviračio žvaigždė" (2011).
Since September 2010, he has been presenting and producing the TV1 shows "Pasivaikšchojimai" (Walks) and "Alchemija". In order to make Lithuanian cultural phenomena visible to a wider audience, the show's creators have created a website "www.alchemija.tv", which contains an archive of the programmes. At the end of 2013, they published a book "Pasivekščiojimai" (Walks), which contains interviews from 20 programmes.
In September 2015, the 7-episode series "Mano kiemo" (My Yard), created by R. Zemkauskas, returned to TV, and was broadcast on the channel Info TV.[5] In November 2015, two of Zemkauskas' programmes, "The Western Effect" and "Panic Room", debuted on Info TV.
Since 1990, Zemkauskas has been translating and promoting films, writing articles for the press and internet websites.
At the radio station "Ultra vires" he created and hosted the programmes "Vidudienis su LNK" (1996-1997), "Dovanų karalius" (The Gift King) (1997).
On 7 June 2017, the channel "LRT Kultūra" started broadcasting R. In March 2019, another project of R. Zemkauskas was shown on the "LRT Plius" channel - the program "Teachers' Room".