Sales-and-use-tax vendor Avalara has named Kevin Riegelsberger, best known in the accounting profession from his years at Epicor, as its president and chief operating officer. Riegelsberger was most recently CEO of Estorian, which provides applications for mainframe storage applications. A founder of Platinum Software, now known as Epicor, Riegelsberger held several executive-level positions at that financial software company.