Meet our staff

Glenda Eoyang, Ph.D. - Executive Director

Royce Holladay

Royce Holladay has been a lifelong learner and educator. Since the mid-1990’s she has engaged in theory development and application of human systems dynamics through her work as a school district administrator, consultant, coach, and writer. Using these foundations, she supports others as they live, work, and play together in complex systems of interaction and growth.

Ms. Holladay is a prolific writer and engaging presenter, seeking to explain complex ideas in simple and understandable terms. In addition to the use of formal essays, articles and papers, Royce often uses stories, poetry and haiku, and graphics to express complex ideas. 

As Director of The Network, Royce is responsible for establishing the conditions that support HSD Associates as they continue their learning journey, contribute to the field of HSD, and come together for common inquiry and fun. She has been Director of The Network since the inception of HSD Institute and believes that the principles of HSD offer insights and options for action that help individuals, groups, communities, and organizations in increasing their adaptive capacity.

Julia Herzing

Julia has a joy for life that is contagious. Her love of people comes through in all she does, and it has influenced her career choices in the past two decades, which have converged to inform her role as Director of Operations at the Institute. 

Julia is an excellent communicator, and enjoys using her diverse experience and skill set in the variety of hats she wears at the Institute. Coming from a background of ten years in household/facilities management and operations, she brings proven abilities in leadership, project management and general operations. Three years in sales and account management are a valuable asset to her as she manages the marketing, branding, and business development functions of the Institute. She plans and promotes HSD related courses and trainings, participates in conferences, and conceives of and develops marketing materials to promote the Institute and its offerings. 

Julia handles product management and packaging/sales for HSD Institute products; website development; and oversight of the Institute’s administrative functions. She loves to communicate with the Institute’s curious friends and connected partners, and looking for better ways to support the growing and thriving Institute we know today. 

De Krengel

De has had many years of experience managing operations and administration in the managed healthcare field, with a strong focus on customer service.  With the many learning opportunities available through HSD Institute, she completes the event planning process by working through all logistical details.  Using her strong communication skills, she handles the administrative components of the daily operational activities.