GreenCastle

Our People

Greencastle’s work reflects the qualities of our consultants: a strong sense of value, a team focus and managerial skill.

First and foremost, Greencastle consultants are leaders. They excel at generating enthusiasm for high performance within project teams. Our core values and our adaptable mindset produce change agents who thrive under pressure, maintain accountability and drive confident decision-making.

While high-impact leadership is one requirement, a collegial atmosphere is another essential element. We pride ourselves in our ability to work as a team — with clinical staffs, with technologists, with vendors — in a collaborative, productive fashion.

Unlike some firms, Greencastle provides consultants who are accomplished, dynamic leaders. Our people bring a proven history of achievement from healthcare as well as complementary fields such as manufacturing, retail, economic development and service provision.

 

Celwyn Evans

Senior Partner, Founding Partner

A senior leader responsible for strategic direction, product development, knowledge management and training, Evans holds more than 20 years of management and consulting experience. Prior to forming Greencastle, Evans worked independently as a project manager and with an environmental engineering consulting firm.

Evans is a retired U.S. Army Ranger, where he served 22 years of service as an officer. Currently, he is chairman of the board of the Southern Berks Regional Emergency Medical Services and a founding member of the Keystone Chapter of the Project Management Institute. Evans earned a degree in chemistry and environmental science from Kutztown University. Contact Evans at evansc@greencastleconsulting.com.

 

Jacob Kretzing, MBA

Senior Partner, Founding Partner

Kretzing guides solution development and engagement delivery for clinical transformation, merger and acquisition and other strategic change initiatives while managing administrative and financial functions at Greencastle.

Over the course of 22 years, Kretzing has been a leader as an officer in the Army National Guard, in active military duty, as a business leader and as a consultant.  Kretzing has managed projects ranging from Computerized Physician Order Entry in hospitals to leading a start-up deregulated utility business from plans to full operations. Kretzing served in the Persian Gulf War with the 10th Special Forces Group, retiring with the rank of captain. He holds a degree in electrical engineering and an MBA from Pennsylvania State University. Contact Kretzing at kretzingj@greencastleconsulting.com.

 

Hamish Stewart-Smith, MBA, PMP

Partner

A partner since 2007, Stewart-Smith joined Greencastle in 2001. He directs ongoing, multi-project engagements with key Greencastle clients. Overall, Stewart-Smith holds 20 years of experience in management and consulting.

Prior to Greencastle, Stewart-Smith was director of account management for RMH Teleservices. Earlier in his career, he served in the U.S. Air Force for 11 years, achieving the rank of captain. Stewart-Smith is a graduate of the United States Air Force Academy and later earned an MBA at Temple University. Stewart-Smith is also a member of the Healthcare Information and Management Systems Society, the Project Management Institute, and the American College of Healthcare Executives. Contact Stewart-Smith at smithh@greencastleconsulting.com.