I have had the pleasure of working with David for a number of years, formerly in his capacity as the head of research at Datamonitor/Ovum when I managed EMEA sales & where he was a great asset in front of prospects & clients alike & really drove growth in our business.
David & I always kept in touch after I left our previous organisation back in 2009 & I then went on to refer him into Gartner for his new role which he took up scarcely 1 year ago.
As others have said it feels like he had been with us at Gartner for not merely months but years given his instant impact he had with all those that had the pleasure to work with him. He was always in high demand from all sales channels to support them in new business opportunities & he could turn his hand to any situation & command a great analytical & commercial conversation.
It is a very sad loss not to have David with us anymore & he leaves behind him a great legacy & a place in our industry that will never be replaced. My thoughts are with his family at this very difficult time.