Born in London, Kosminsky attended Oxford University as a chemistry major, during which he spent much of his time in the theatre as a lighting designer for the Dramatic Society. He began his career in 1980 at the BBC as a general trainee, working as a Drama Script Editor before moving to Current Affairs as a director on Nationwide, Breakfast Time and Newsnight. He then joined Yorkshire Television in 1985 as documentary Producer/Director for the First Tuesday series, which included the award winning The Falklands War - The Untold Story, Cambodia: Children of the Killing Fields and Afghantsi, as well as the two-part drama Shoot To Kill by Michael Eaton. In the early nineties, he turned to fiction with Wuthering Heights and since 1995 has worked freelance. After The Life and Death of Philip Knight - the life and death of a young man who is victim of a miscarriage of justice and commits suicide in prison - he made The Dying of the Light, about the murder of a British aid worker working with UNICEF in Somalia. Then came No Child of Mine and Walking on the Moon, afterwhich he directed Warriors, in which he described the plight of a British UNPROFOR peacekeeping battalion in Bosnia in 1992. He followed this with the docudrama Innocents, which dealt with experimental surgical practices used on children in Bristol. The Project was a chronicle about the rise to power of Tony Blair's Labor Party, afterwhich he directed a feature in Hollywood, White Oleander. His recent work includes a film for Channel 4 and Arte about the suicide of leading microbiologist and former chemical weapons specialist David Kelly, again raising the question about truth and deception in politics, the manipulation of public opinion and public trust in its institutions. Kosminsky was a past winner of the Alan Clarke Award for Outstanding Creative Contribution to Television and is a Fellow-elect of the RTS. He lives in Wiltshire, England, with his wife Helen and his two daughters.