US Executive Board


Rachel a. cohen, phd

Founder, Executive Director

Rachel is a clinical psychologist who has been in practice for over 30 years. She founded Common Threads in Geneva Switzerland in 2012. Now based in New York, she is a consultant specializing in psychosocial support for survivors of trauma. She has designed recovery projects in the developing world, training local staff and implementing interventions in post conflict areas including Bosnia, South Sudan, Uganda, Ecuador and Nepal. She earned her doctorate from the University of Michigan in 1986, and a certificate in global mental health from the Harvard Program in Refugee Trauma in 2010.  


Mary briese matheron

Secretary, US Executive Board

Mary was the Associate Dean of Development at Yale Law School until 2017, where she led the team responsible for securing private support for core operations, campus expansion, transformational programs, and endowment. Prior to joining the YLS staff in March 2013, she was a consultant on leadership giving to the United Nations High Commissioner for Refugees (UNHCR). From 1996 to 2011, she held a number of positions in the Development Office at Georgetown University Law Center, including Executive Director from 2003-2011. Her career in Development began at the Academy of Holy Names in Silver Spring, Maryland, where she was the Director of Development from 1985-1987. Mary also worked in Georgetown University’s Athletics Department from 1978-1983, serving as Head Women’s Basketball Coach from 1981 to 1983. She holds a B.S. in Kinesiological Sciences from the University of Maryland.


maureen brotherton

US Executive Board

Maureen Brotherton currently sits on Seattle University’s Board of Trustees and Achon Uganda Children’s Board. Service includes past President of Seattle Rotary Service Foundation Board and continued membership in Seattle Rotary/Rotary International. Maureen was past chairman of Seattle University’s Board of Regents an Seattle University’s College of Arts and Sciences’ Leadership Council.

When her children were young she served for several years on Seattle Children’s Hospital’s Uncompensated Care Board as well as The Villa Academy Board of Trustees.

She has a BA in Society and Justice, University of Washington and a master’s degree in Not-for-Profit Leadership from Seattle University.

Maureen co-founded, with her daughter Tia, Teens In Public Service (TIPS) in 1997. Maureen and her husband, Joe, are the proprietors of Doe Bay Resort & Retreat located on Orcas Island.


n. Lynn hiestand

President, US Executive Board

Lynn is a corporate lawyer and former partner of the law firm Skadden, Arps, Slate, Meagher & Flom LLP resident in Chicago and London. Lynn previously served as Iraqi Country Director for Heartland Alliance International, a human rights organization providing legal, social and mental health services to vulnerable populations, including survivors of GBC and SGBV, and continues to consult on human rights issues. She serves on the Board of Visitors of Georgetown University Law Center and on the Executive Board of JUSTICE, a law reform and human rights organization working to strengthen the justice system in the United Kingdom. She is also a trustee for Wellbeing of Women, a UK charitable organization investing in pioneering medical research to keep women well at each stage of life, and for Literature for All of Us, which helps disadvantaged individuals realize the transformative strength of their voices in by growing communities of readers and writers.


ann blume

Treasurer, US Executive Board

Ann Blume is a community leader living in Seattle, Washington. She currently serves on Seattle University’s Board of Trustees and the College of Arts and Sciences Leadership Council. Ann also was on the SightLife Board, the University of Washington’s Center for Infant Mental Health and Development Council and Teens in Public Service Board. After graduating from Cornell University with a Biology and Nutrition degree in 1978, Ann moved to Washington D.C. where she helped implement the first generation of personal computers as a staff assistant to Senator Bob Packwood of Oregon. Ann met her husband, Bruce, while working in the U.S. Senate. In 1982, Bruce and Ann founded the Blume Company, a Seattle real estate development business which has helped transform Seattle’s South Lake Union, University, Eastlake and Fremont neighborhoods. The parents of five children, they share a passion for family, public policy, and philanthropy.


patricia friedman, md

US Executive Board

Patty Friedman is a retired pediatric geneticist who has been active in her retirement with a variety of volunteer activities. In addition to her work as a geneticist, Patty is a trained forester and naturalist and a certified yoga instructor. She fulfills her interest in patient care with hospice work and her love of the outdoors with work for the Audubon Naturalist Society. She as been a great supporter of Common Threads since it’s beginning and she looks forward to being more active now that she is a board member.


Geneva Executive Board


sarah sargent

President, GVA Executive Board

Sarah received her BSc (Hons) in Physiology and Zoology from the University of London. On graduating, she worked for the Australian Freedom From Hunger Campaign, and NGO focusing on community-based development in the Asia and the Pacific. During a field visit to Bihar, India, she was inspired to research the role of agribusiness in development. Her book, The Foodmakers, was published by Penguin in 1985 and serialized by the Australian Financial Review, which hired her as a staff writer. Sarah was subsequently posted to the Parliamentary press corps in Canberra and then to Bangkok where she covered politics, economics and business in South and Southeast Asia. From Thailand, she was recruited by a UK-based financial publisher as an editor in Hong Kong. After the Asian financial crisis in 1997, she co-founded an independent financial research and publishing company in Asia. Since 2009, Sarah has been researching trauma and trauma therapies. Sarah was a founding member of the Geneva Board of Common Threads.


Nguyen-Toan Tran, MD, MSc, DrMed

Geneva Executive Board

Toan is a family physician with a passion for community and international health with more than twenty years of experience. He has worked in Asia, Africa and Latin America in collaboration with ministries, United Nations agencies, local and international NGOs, and academic institutions focusing on improving access to sexual and reproductive health and rights through advocacy, capacity development, program implementation and research.


Marika Hofmeister

Geneva Executive Board

Marika Hofmeister is a sociologist/social anthropologist with two decades of programme and funds management, donor government relations in international development, and humanitarian action at country, regional and headquarters level with UNICEF, World Food Programme and the Global Fund to Fight AIDS, Tuberculosis and Malaria. She has lived and worked in Sri Lanka, Niger, Benin and Senegal mainly working on health, nutrition and education related issues with strong focus on human rights and gender. She earned her masters from the University of Helsinki, Finland and from Lausanne University, Switzerland. She is passionate about natural and traditional healing and ethnobotany and is certified in alternative medicine/naturopathy specialized in nutrition and phytotherapy.


Sia kessi

Secretary, GVA Executive Board

Sia Kessi has been working in the solar energy industry for close to three years. Prior to that, Sia acquired over 20 years experience in the fields of digital communications, marketing and project management for businesses as diverse as mining, inspection and IT. She holds a BA (Hons) in Social Anthropology from the University of Sussex and has lived most of her life in Geneva, Switzerland, working mainly in the private sector and family-run enterprises. In 2008, Sia co-founded an association to fund community-based development projects in Tanzania. Sia has particular interest in healing remedies for PSTD, trans-generational trauma and depression. Sia has lived in the UK, the USA, Tanzania and Switzerland.


paul march

Treasurer, GVA Executive Board

Paul trained as a clinical psychologist and worked for a number of years: first with adults with complex psychiatric histories and then in brain injury rehabilitation.
He subsequently moved to Geneva with his family and retrained as an artist. Part of his artistic practice involves the use of clay-making as a tool to develop an ecological, environmentally sensitive model of creative and psychological change. For the last two years he has conducted this research as a doctoral student at the University of Oxford, UK.

nicola dahrendorf.jpg

Nicola Dahrendorf

Geneva Executive Board

Nicola Dahrendorf has 30 years’ experience in conflict and post-conflict settings focusing on peace building and conflict resolution, protection of civilians and child protection, SEA and sexual and gender-based violence and on security sector and justice reform in fragile environments. Her past UN work involved six peacekeeping operations in senior management positions: CAR, Haiti, in DRC and Rwanda, East Timor, Bosnia and Cambodia. She has worked at UNICEF HQ as Chief of Humanitarian Policy and Advocacy and with UNHCR for seven years on refugee law and protection issues. She has carried out policy and field-based assignments for the Norwegian Refugee Council as a Senior Protection Adviser in Somalia. For the UK Government/DFID she worked in Kenya, Nigeria, DRC, South Sudan, Somalia and Nepal. She has worked in academia with King’s College London and is an Honorary Research Fellow at Birkbeck College, London University. Her academic background is in Social Anthropology and Law (Cambridge and SOAS).


Faculty and Staff

IMG_1343 (1).JPG

Jackie Wallace

Associate Director

Jackie joined Common Threads’ administrative team in November of 2017. She has a Master of Arts in Psychology from The New School. Jackie assists with project management, administration, communications, social media, and grantwriting.


Cynthia Uccello, MA

Consulting Psychologist,
Bosnia Project Manager

Cynthia is a Counselor and life coach with a private practice in Geneva, Switzerland working with adolescents and adults. She received an M.A. in Counseling from Webster University Geneva and holds the ACC-level accreditation from the International Coach Federation. She previously worked in sales/marketing roles in a multinational corporation, leaving the field in 2005 to pursue a path of purpose in the healing profession. She is the co-Chair of Project HOPE, a Geneva-based organization dedicated to supporting survivors of sexual violence, and the Treasurer of the Geneva-based Common Threads Association.

tally-tripp (2).png

Tally tripp, MA, MSW, LICSW, ATR-BC

Art Therapy Consultant

Tally received her Master’s degree in Art Therapy from George Washington University (1981) and her Master’s in Clinical Social Work from the University of Maryland (1986). For the past 25+ years, she has maintained an active private practice in Art Therapy and Psychotherapy in Washington, DC and Alexandria, VA. Tally is also an Assistant Professor at George Washington University, where she is the Director of the GW University Art Therapy Clinic, a training clinic that provides art therapy to the community and specializes in trauma treatment. She lectures and presents workshops and trainings both nationally and internationally and is the author of several articles and publications focusing on experiential approaches for the treatment of trauma. Tally specializes in the treatment of mood, anxiety and complex trauma disorders, and is certified in eye movement desensitization and reprocessing (EMDR), Sensorimotor Psychotherapy (SPI), and Intensive Trauma Therapy (ITT). Additionally, Tally has advanced training in Somatic Imagery, Group Psychotherapy, Short Term Dynamic Psychotherapy, and Clinical Hypnosis. Tally is a Fellow of the International Society for the Study of Trauma and Dissociation (ISST-D) and chair of the Creative Arts Special Interest Group. Tally values all kinds of mixed media art making for creative expression and for managing stress.

Cath_sml (1).jpg

Catherine Butterly, MA

Senior Adviser for Trauma Theory and Training

Catherine has trained in Family therapy, Play therapy and adult psycho therapy. She lives in the Geneva area and works as a psychotherapist, University teach and Clinical Internship Co-ordinator on the Master’s in Counseling at Webster University Geneva. Prior to this post, she lived and worked in Zimbabwe for 8 years. She has worked in a variety of contexts with people challenged by traumatic experiences and is very interested in how people process these experiences and how creative and artistic methods can be used in conjunction with other trauma treatments to promote healing. Catherine is also an avid quilter.


Lisa Raye Garlock, ATCS, LCPAT

Art Therapy Consultant

Lisa is a full-time faculty member in the graduate Art Therapy program at George Washington University. She has presented workshops and given lectures on art therapy topics in the U.S. and abroad. She is a credentialed art therapy supervisor (ATCS) and is a Licensed Clinical Professional Art Therapist (LCPAT). She has worked with adults, adolescents and children in hospitals, schools, community-based organizations and shelters. In addition Lisa is an accomplished artist, exhibiting work in a variety of media, with a current focus on arpilleras. She studied printmaking and textiles at Rochester Institute of Technology and earned a Masters degree in Art Therapy from Nazareth College of Rochester.


Ivan Komproe, Phd

Research Consultant

Dr. Komproe is a leading scholar and researcher in the field of global mental health.  Since 1996 he has been the director of research and development at HealthNet TPO in Amsterdam.  He is Chair of Collective Trauma at Utrecht University,  associate Editor at BMC Psychiatry, and been Research Coordinator at the Psychotrauma Centre, South Netherlands. Dr. Komproe’s core areas of expertise are research (quantitative) methods, research designs, analyses of multi-site, large and complex data sets (e.g. longitudinal data, nested data) and the implementation of research findings in the development, adaptation and implementation of mental health and psychosocial care systems within low-income and conflict-affected settings. He has authored more than a hundred journal articles on these topics.