Board of Directors

Greg Cook

Founding Executive

With a career that spans nearly three decades, Greg is a seasoned business executive supported by a global network. Since doTERRA’s inception, Greg’s unique ability to push past limitations has guided his strategic planning contributions and heartfelt giving throughout the company’s history.

Greg has been, and continues to be, vital in establishing doTERRA’s global footprint in business and philanthropy. He has lived and worked in Africa, Europe, North America, and Asia.

Greg received a bachelor’s degree in international relations from Brigham Young University. He serves the community by sitting on several boards. Among his many interests, he finds the most joy in spending time with his wife Julie, their five children, children’s spouses, and grandchildren.

David Stirling

Founding Executive

Under the visionary leadership of former CEO, David Stirling, doTERRA became the largest and most trusted essential oils company in the world.

In 2022, David was called as a mission president for The Church of Jesus Christ of Latter-day Saints in Armenia and Georgia, and subsequently stepped down as CEO. He continues to serve and advise the doTERRA Board as time permits. David has a natural ability to guide unprecedented global growth—including identifying new market openings and overseeing remarkable Co-Impact Sourcing^® initiatives.

He continues to place the growth and progress of people as a major priority of his leadership by mentoring others using kindness and a service-focused mindset. David’s greatest accomplishments are the many friends, adventures, and service opportunities that have been created for the doTERRA family, through the company’s growth and success.

Dr. David Hill, DC

Founding Executive

Dr. Hill oversees all science, research, medical, and safety departments at doTERRA. He’s known across the world as an expert in essential oils and integrative medicine.

Dr. Hill, a pioneer and leader, has been a pivotal force for bringing essential oils into the mainstream over the past several decades. He partners with international physicians, scientists, and hospitals, defining and establishing the medical integration and use of essential oils in modern health practices. He guides advances in essential oil science at top universities and research affiliations, helping provide more in-depth understanding of essential oils and their uses.

Along with his many accomplishments in essential oil science and research, Dr. Hill is also a beloved educator. At the end of the day, his favorite way to spend his time is at home with his wife, children, and grandchildren.

Mark Wolfert

Founding Executive

As one of doTERRA’s founding executives and former general counsel, Mark has been instrumental in pursuing pure products, pure business practices, pure intentions, and most importantly—the pure love of humanity. While leading with his sharp mind and kind heart, Mark has mentored thousands of doTERRA employees and Wellness Advocates to reach beyond their comfort zones to serve others.

As the executive founder overseeing doTERRA Healing Hands™, he guides the mission of empowering people and communities worldwide to make positive and sustainable change and become self-reliant. Mark is always most excited about supporting Wellness Advocates who are finding ways to engage in good in their own communities through doTERRA Healing Hands partner projects.

Mark and his wife Carol are the parents of five children who share his passion for encouraging others to be their best selves.

Jeff Singer

Board Member

With over two decades of experience in senior management and executive roles, Jeff brings a wealth of global operational expertise to doTERRA's board. He has held leadership positions with brands such as NASDAQ and SAP, living and working on the East Coast of the United States and across the Middle East throughout his career. Before joining doTERRA, Jeff served as Group CEO at YBA Kanoo, one of the largest family-owned companies in the Middle East, and previously held CEO roles at both Nasdaq Dubai and the Dubai International Financial Centre (DIFC). His background spans sales leadership at SAP and operational leadership in setting up NASDAQ's Dubai market. Jeff earned an MBA from Harvard Business School and a BS in International Finance from Brigham Young University. He brings this depth of global operational and executive experience to doTERRA's board, helping guide the company's continued growth and strategic direction.