Sandler by Peak Performance Management, Inc. | 1,465 followers on LinkedIn. Acquired by Sean Coyle in 2020, a past associate and partner of the organization, Peak Performance started out as a dream of former IBM sales star, John Rosso, to help other sales professionals reach their goals has now become the most successful Sandler Training franchise in the world. Sean and his team will continue to honor that dream and push the limits of client engagement and expectations for growth moving forward. Sandler Training by Peak Performance, based in Pittsburgh, PA has helped thousands of sales professionals and business leaders achieve success using the Sandler System—a step-by-step program that involves counter intuitive psychological principles to generate sales leads and close deals.