With over 30 years of experience in large, complex organizations, Encore Executive Coaching specializes in Leader Development , Performance Development, Executive and Professional Coaching, and Organizational Consultation. Its Founder, Mary T. O'Sullivan, has coached dozens of leaders and professionals to 100% results. Mary has worked with clients from large firms such as Raytheon, Lockheed Martin, Tory Plastics, RI Hospital, to tiny, local organizations.