Wm. J. Trotter & Associates is a Richmond Hill based public accounting firm with dedicated professionals who provide a complete range of public accounting, taxation and audit services to individuals and businesses.Wm. J. Trotter & Associates serves a wide roster of clientele including manufacturing and distribution businesses, construction and service industries, owner/managed businesses, retail organizations, not-for-profit organizations and professionals. Clients range in size from small proprietorships to large multinational corporations.