Mehiel will replace former City Controller William Thompson, who resigned his position on the BPCA last month to focus on his mayoral bid.
Mehiel previously served on the Empire State Development Corp. for Cuomo.
Having made his fortune in the cardboard and paper cup business, Mehiel is a big Democratic party donor.
Since 2009, he’s given $92,000 to Cuomo in campaign donations. His wife, Karen, has donated another $44,862.