Joseph M. D'Avella, CPA. Director, Mazars USA, LLP. Joseph M. D'Avella, CPA has been a partner with the accounting and advisory firm Mazars USA, LLP for the past 15 years. Prior to joining Mazars, he was a partner with the accounting and advisory firm Lipman, Zelznick and Witkowski PC for six years. During his years with Mazars USA, LLP ....