I am primaily involved in the following organizations (I also follow the work in DVB, W3C, 3GPP (SA4), HbbTV, ATSC and SCTE):
Individual contributor and working group (PAYLOAD) co-chair (since 2007). My list of 20+ RFCs, author stats page, list of active drafts and list of expired drafts .
Individual contributor, editor and subgroup (DASH) co-chair (since 2010). I have also been the head of delegation for the Turkish National Body for JPEG and MPEG since late 2017.