Esther Derby and Don Gray

Esther Derby draws on four decades of experience leading, observing, and living organizational change. She works with a broad array of organizations. Her clients include both startups and Fortune 500 companies. Based on experience and research, her approach blends attention to humans and deep knowledge of complex adaptive systems. Esther has been called one of the most influential voices within the agile communities when it comes to developing organizations, coaching teams, and transforming management. Her work over many years has influenced coaches and leaders across many companies.

Esther started her career as a programmer. However, over the years she’s worn many hats. From all these perspectives, one thing was clear: individual, team, and even organizational success depends greatly on the work environment and organizational dynamics.

Esther has an MA in Organizational Leadership and a certificate in Human Systems Dynamics. She’s trained as a Mentor Coach and a Satir Coaching Specialist.

She’s also the host of the popular podcast, Change by Attraction and co-host of the Law of Jam podcast.

doncroppedDon Gray’s quest to answer “What is the earliest indicator for a project’s status?” has led him to focus on such diverse topics as communication, personality types, team styles, systems thinking and human systems dynamics. For more than 25 years, his clients have ranged from small startups to Fortune 50 involving manufacturing, pharmaceuticals, financial, engineering and telecommunications. Don’s varied interests and client experience provides a platform for helping clients introduce and work through change as they transition to agile development practices. He conducts workshops on accelerating change, personality type, and retrospectives. Don occasionally writes articles that can be found in STQE, Better Software and on StickyMinds. His blog can be found at

You can reach Don via email or at

jerry2 We received the sad news that Jerry passed away on August 7, 2018. His work will live on in his many books and articles (some of which you will find here), and in the influence he had on us and many others.

For more than 50 years, Jerry (Gerald M.) Weinberg (October 27, 1933 – August 7, 2018) worked on transforming software organizations. He is author or co-author of many articles and books, including The Psychology of Computer Programming. His books cover all phases of the software life-cycle. They include Exploring Requirements; Rethinking Systems Analysis and Design; TheHandbook of Walkthroughs, Inspections, and Technical Reviews; An Introduction to General Systems Thinking; and General Principles of System Design. His books on leadership include Becoming a Technical Leader; The Secrets of Consulting; More Secrets of Consulting; and the Quality Software series. His book, Weinberg on Writing: The Fieldstone Method, appeared in 2005, followed by Perfect Software and Other Myths about Testing. His first techno-thriller novel, The Aremac Project, appeared in 2007, followed by (so far) seven more novels in which the characters act out situations analogous to the situations Jerry encounters in his software consulting. Visit to read excerpts of Jerry’s books, now available as ebooks.


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