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About Us​

Our Team

We’re leaders in our field who walk hand-in-hand with those we serve.​

Meet Our Team

Dr. Marissa N. Coleman is a bilingual licensed clinical psychologist whose practice is directly influenced by her work with torture survivors in El Salvador. Dr. Coleman’s specialty includes culturally grounded approaches to trauma recovery and psychological well-being. She views challenges from multiple perspectives, and honors the cultures of each individual and system with whom she works. She enjoys enjoys reggae music, being by water, and traveling with her family.

Marissa N. Coleman

Dr. Marissa Coleman

Consulting Psychologist

Dr. Diane Flannery holds a Ph.D. in Organizational Psychology. She is a serial social entrepreneur passionate about creating change through social enterprise and innovation. Dr. Flannery has over 30 years of leadership experience domestically and internationally and has done work in Cape Town, South Africa, over the last sixteen years. She enjoys travel, is a sculptor using indigenous weaving techniques, and loves spending time with family and friends.

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Dr. Diane Flannery

Chief Executive Officer

Dr. Scott Grover is a licensed clinical psychologist who provides training, counseling, and consulting services. With a background in training mental health professionals specializing in trauma treatments, he is particularly interested in research related to training humanitarian aid workers for high risk environments and the psychological aspects of security training. Scott enjoys backpacking, snow skiing, teaching, and playing soccer with peers and his children.

Dr. Scott Grover

Dr. Scott Grover​

Director of Clinical Services

Dr. Monique Mendoza is a licensed counseling psychologist with a background in training clinicians on supporting high risk clients, threat management for various work settings, and a holistic worldview of trauma. She brings a unique perspective to supporting aid works internationally. She enjoys gardening, quality family time, and outdoor adventures.


Dr. Monique Mendoza

Consulting Psychologist

Dr. Jacquelyn Millham is a licensed clinical psychologist with more than a decade of experience in psychoanalytic psychotherapy, with a special focus on team dynamics in cross-cultural environments. She is a former aid worker, with experience in refugee support (Somalia and Thailand) and co-founded a nonprofit addressing children at risk in Kenya. She enjoys outdoor recreation, travel, gardening and hiking.

Dr. Jacquelyn Millham​

Dr. Jacquelyn Millham

Senior Consulting Psychologist

Megan Moody acts as the Operations Manager at Headington Institute, overseeing its administrative, bookkeeping, and organizational needs. Megan graduated with an M.A. in Theology from Fuller Seminary in 2017. In their spare time, Megan enjoys performing music, exercising, and spending time with friends.

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Megan Moody

Operations Manager

Dr. Sheila Konyu Muchemi is a licensed clinical psychologist based in Nairobi, Kenya. She works in private practice. She has taught various courses at undergraduate universities in Kenya, and continues to provide trainings to different audiences on mental-health related topics. Dr. Muchemi has experience working in various inpatient and outpatient settings in the US where she obtained her doctorate degree. She enjoys traveling, a good novel, and spending time with friends and family.


Dr. Sheila Konyu Muchemi

Consulting Psychologist

Dr. Aaron Rosales is a licensed clinical psychologist who specializes in supporting people striving for a better world. He co-founded a nonprofit that partners with community leaders to design and launch wellbeing initiatives globally. In both therapy and training, Aaron uses this personal experience and insights to impart the key psychological skills for resilience in the face of adversity. He enjoys all things coffee, cooking, and travel.


Dr. Aaron Rosales

Consulting Psychologist

Abby Schmidt is a Research Assistant at Headington Institute, supporting data analysis and research and development projects. She is currently pursuing her doctoral degree in Clinical Psychology at Fuller Graduate School of Psychology. Having grown up in Cameroon, Abby is interested in providing mental health services for humanitarian workers globally. In her spare time she likes to explore new restaurants and food, spend the day at a park, or watch TV!

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Abigail Schmidt

Research Assistant

Dr. Alice Schruba is a licensed clinical psychologist with a background in serving individuals and groups experiencing acute and chronic stressors, burnout, substance abuse, and grief and loss. Her clinical interests surround values clarification, meaning-making, resilience, assessment, and spiritual and psychological well-being following disasters. She enjoys reading, listening to podcasts, and exploring nature preserves with her dog.

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Dr. Alice Schruba

Consulting Psychologist

Kati Shepardson is a Research Assistant at Headington Institute and a doctoral student in Clinical Psychology at Wheaton College; she previously completed a Masters in Humanitarian and Disaster Leadership at Wheaton College. Her experience living through a major disaster as well as volunteering after disasters has led to a desire to understand what disaster recovery looks like for communities and individuals worldwide. Her primary clinical interests are trauma and neurodiversity, specifically autism in adults.

Kati Shepardson (3)

Kati Shepardson

Research Assistant

Dr. Brent Stenberg is a licensed clinical psychologist with 35 years of experience providing training, counseling, and consulting services with a special focus on leadership development. Over the years, Brent has traveled to places like Haiti, South Sudan, Pakistan, and Afghanistan to support regional staff welfare initiatives. Brent enjoys international travel, mountaineering, and photography.

Dr. Brent Stenberg

Dr. Brent Stenberg

Senior Consulting Psychologist

Kristen Swift is the Special Projects Associate at Headington Institute where she executes ongoing support functions as well as strategic projects. She holds a BS in Communications from Boston University and enjoys spending time with her husband, 3 boys, 2 dogs and 3 chickens.

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Kristen Swift

Special Projects Associate

Muriel Tyan is a trilingual licensed clinical psychologist based in Paris, France with over 20 years experience. She has a background in treating patients with trauma from high risk environments. She gives training, webinars and is a lecturer and guest speaker on conferences in the Arab world. She is passionate about clinical work as a psychotherapist supporting patients suffering from PTSD, depression, bereavement, chronic illness, anxiety and burnout. She enjoys sports, reading, theater and dancing.


Muriel Tyan

Consulting Psychologist

Dr. Shelle Welty is a licensed psychologist who has been deeply influenced by her work with Central American refugees. Her clinical interests include trauma treatment, group psychotherapy, spirituality, and building resilience in those who live and/or work in chronically stressful environments. Shelle enjoys mountain biking, live music, and new adventures.

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Dr. Shelle Welty

Consulting Psychologist

Dr. Jennifer T. Young serves as a bilingual Consulting Psychologist, providing psychotherapy services in English and Mandarin. She is a licensed psychologist with a background in family systems and couples therapy. Dr. Young’s work has been influenced by the multiple international settings she has worked in where she has provided training, consultation, programming, crisis intervention, and/or counseling services. She enjoys reading, writing, studying Mandarin and Spanish, dancing, and practicing yoga.


Dr. Jennifer T. Young

Consulting Psychologist

Board of Directors

Leah Porter is a Vice President at Capital Group Companies Global, focusing on marketing. Leah is an experienced marketer with a proven track record in increasing brand equity and accelerating profitable growth in a variety of industries. Leah has been working with the Headington Institute for the past 8 years because she believes strongly in the mission of the organization. While she enjoys financial services, she also loves spending time with family and hiking.


Leah Porter, Chair

Vice President | Capital Group Companies

Jock Ebner is President of Morlin Asset Management, LP, a regional commercial real estate property management and leasing company. As a specialist in the management of multi-story office buildings and emergency response, including the well-being of emergency first responders. Over the years, Jock has been active in local communities as a coach in youth soccer and baseball organizations.


Jock Ebner, Vice Chair

President | Morlin Asset Management, LP

Joan Riboli is retired CFO of The San Antonio Winery, the oldest winery in Los Angeles, and remains active in the family business. An experienced nonprofit volunteer, Joan was Commissioner of Soccer, AYSO, in South Pasadena, overseeing numerous programs and regional volunteers. A commitment to "helping those who help others" led her to join the board of directors in 2011. A new business venture and enjoyment of family and granddaughters continue to keep her busy.

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Joan Riboli, Secretary

Chief Financial Officer (Retired) | San Antonio Winery

Pamela Fogg is a principal in the firm of Dowsett, Fogg, & Doler, P.C. where she directs the healthcare reimbursement practice supporting skilled nursing facilities and home health agencies. An active volunteer, she has served on the boards of an AIDS facility, an oral deaf school, and as a lottery commissioner for the state of Oregon. She is currently a founding board member of Arise Rwanda Ministries focusing on vocational education, clean and safe water systems, and community development in Boneza, Rwanda.

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Pam Fogg, Treasurer

Certified Public Accountant | Dowsett, Fogg, & Doler, P.C.

Michelle Banks is the President of the African American Firefighter Museum. Michelle joined the Los Angeles Fire Department (LAFD) in 1984. She is the LAFD’s third uniformed African-American woman, second African-American female Paramedic, and the first Special Assistant to the Fire Chief. Ms. Banks’ commitment to the fire service and dedication to enhancing the community’s well-being has been honored with California Senator Curren D. Prices Jr.s’ 2013 Hero Award and the Los Angeles City Women of Courage Award in 2000.


Michelle Banks

President | The African American Fire Fighter Museum

Christopher Martin is the Chief Executive Officer and Co-Founder of Direct Access Capital, a Dallas-based specialty finance firm. He has spent the last 13 years in alternative investments and is passionate about finding and pursuing the best risk-adjusted returns in the private credit markets. Christopher believes strongly in the Institute's mission of equipping global aid workers and emergency responders with the tools to flourish in the midst of a crisis. Apart from the investment world, Christopher enjoys flying, tennis, and blues music.

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T. Christopher Martin

CEO | Direct Access Capital, LLC

John Romero retired in 2017 from a 32-year-long career in professional law enforcement. As a police captain, John was credited as the first to bring wireless emergency alerts to Los Angeles County. He currently directs the Los Angeles County Region, Southern California Alumni Chapter of the Naval Post Graduate School, Center for Homeland Defense and Security. John remains interested in improving policies and practices that mitigate fatigue-related errors in high-consequence environments. John places a high priority on faith, family and friends.


John Romero

Director | LA County Region, Southern California Alumni Chapter Of The Naval Post Graduate School, Center For Homeland Defense And Security

LuAnn Yocky is the retired National Executive Director for World Vision U.S. Working in the philanthropy division for over 35 years, she led trips throughout Africa, Asia, and Latin America to allow project partners to witness, firsthand, the impact of their humanitarian support. Her unique understanding of humanitarian challenges and expertise in philanthropy led her to join the board of directors in 2015. She remains involved with World Vision as a volunteer and is a charter member of the Columbia-Willamette Women of Vision.

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LuAnn Yocky

Senior National Director, Transformational Engagement (Retired) | World Vision United States

Support our global humanitarian workers.