Daniel Mueller
Founder and CEO

Daniel, the founder and CEO of SOLIDleaders and SOLIDpastors, is a pioneer in the executive coaching industry. Since 1987, he has provided executive coaching to over 1,400 CEOs and executives, conducting more than 80,000 coaching sessions and witnessing transformative results.

Passionate about serving leaders at all levels, Daniel is committed to helping pastors enhance their effectiveness in both personal and ministerial domains. His previous roles as CEO of a management training company, business advisory firm, and organizational development consultancy have greatly influenced his approach to pastoral coaching. Daniel’s expertise encompasses disciplines such as behavioral sciences, behavioral psychology, and executive career counseling. He continually expands his knowledge of executive leadership and frequently shares his insights through speaking engagements and publications focused on executive peak performance.

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Arthur Denyer
Executive Director

Arthur is a Costa Rican professional with a rich and diverse background. Trained as a psychologist, he ventured into the field of market research, where he spent 28 years as a consultant specializing in product development and consumer behavior.

For the past 18 years, Arthur has devoted his time to training leaders and facilitators, honing his skills in this area. Alongside his work in market research, he has spent 16 years actively managing non-profit and church ministries.

For the last 10 years, Arthur has also served as a lecturer and instructor, focusing on soft skills and personal development. He holds certifications both in executive coaching and in spiritual direction.

Diana Sequeira
Operations Manager

Diana holds a degree in Business Administration and has worked in Hospitality and Tourism, Real Estate, and Insurance. In 2021, she became a certified Executive Coach with SOLIDpastors, followed by a Life Coaching certification from the Malumbres Institute in 2022.

From 1998 to 2006, Diana served on the Board of Directors for Aglow Nicaragua, where she preached and organized national events. Since 2019, she has been a facilitator of the Partners Worldwide Small Business Curriculum. Diana is also a member of the Board of Directors for Haggai Nicaragua, where she facilitates and organizes national virtual experiences, while mentoring new graduates.

Diana’s primary passion lies in assisting leaders in Latin America in discovering their identity and purpose through a faith-based approach. Diana’s certifications include SOLID Pastoral Coach Certification, Creative Results Management (Coaching Mastery), and Life Coaching from the Malumbres Institute.