Dennis Tirman

Senior Partner

For over thirty years, Dennis has successfully engaged executives to understand and achieve individual and organizational change. Formerly a Partner with Mercer Delta Consulting, Dennis specializes in executive coaching, consulting on organizational architecture, strategy implementation, senior team development, merger integration, and transformative culture change.

Throughout his career, Dennis has coached executives from around the globe in many industries. As a consultant, he has served as advisor and coach to CEOs and senior teams of multi-billion-dollar businesses. He has collaborated on large-scale development projects in the US, Central and South America, and Europe. As a former executive, Dennis has experience in getting results through talented managers while contributing to their development. He previously held the position of director of leadership and organization development at Chiquita Brands International, where he was responsible for creating the systems and processes for the development of key executive and management talent for the corporation, worldwide. He has also served as a senior consultant for the Rohm and Haas Company and Automatic Data Processing.

Dennis has lectured at the Master’s level at Columbia University Teacher’s College on the topic of consulting to CEOs and senior leaders. He also served as an advisory board and adjunct faculty member for the Executive Leadership and Organization Change Master’s Program at the Haile/US Bank College of Business at Northern Kentucky University.


• consumer products
• financial services
• fresh food marketing and distribution
• healthcare
• pharmaceuticals
• retail
• telecommunications

• B.S., University of Cincinnati
• M.S., Organization Behavior, American University/NTL Institute for Applied Behavioral Science

With additional training at:
• Gestalt Institute of Cleveland
• National Training Labs
• Institute of Strategic Management
• Taos Institute

• UBS Financial Services
• International Paper
• Siemens
• Johnson Controls

• Trihealth
• SSM Healthcare
• Mercy Health (formerly Catholic Health Partners)
• Franciscan Missionaries of Our Lady Health System
• Martin’s Point HealthCare
• Choice Care Humana
• Pfizer
• Mercer Human Resources
• Quest Diagnostics

“The hallmark of Dennis’s coaching is helping Senior Leaders to create organizations that inspire and execute – supporting clients in achieving business goals while increasing levels of vitality and performance.”


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