who is chairman or director general DED Abu Dhabi

The Chairman of Abu Dhabi Department of Economic Development (ADDED / DED Abu Dhabi) is H.E. Ahmed Jasim Al Zaabi. The department’s official site also identifies him in its chairman’s message and leadership section.

If you meant the Director General specifically, I don’t have a verified current name from the source I found. The official ADDED “About Us” page confirms the chairman but does not show a director general in the retrieved content.