Marilyn Grunzweig Geller, Chief Executive Officer

Marilyn is Chief Executive Officer for Celiac Disease Foundation (CDF), the nation’s leading voluntary health organization for celiac disease and gluten sensitivity.  A previous Treasurer of the CDF Board of Directors, Marilyn brings more than 20 years of management experience in healthcare and IT operations. A former Los Angeles County and UCLA hospital administrator and RAND Corporation researcher, she served as Vice President of Product Management and Regulatory Compliance Officer for Medversant Technologies, the national provider of healthcare credentials verification services and software applications. A co-founder of Medversant, Marilyn was responsible for the company’s strategic direction and is the lead inventor of the company’s patented technologies. Marilyn’s nonprofit experience includes board positions with the Olive View-UCLA Foundation, UCLA Health Services Alumni Association and Alpha Chi Omega.

Becoming CDF’s Chief Executive Officer marks a return to her roots in public health advocacy. Selected as a Los Angeles County Department of Health Services Fellow, Marilyn received her MSPH degree from the UCLA School of Public Health and her undergraduate degree from UCLA. The mother of a son with celiac disease, undiagnosed until the age of 15 despite lifelong symptoms, Marilyn is a determined advocate for celiac disease and gluten sensitivity advocacy, education and research.

Email Marilyn at

Deborah J. Ceizler, Chief Development Officer

Deborah is Chief Development Officer for Celiac Disease Foundation (CDF), the nation’s leading voluntary health organization for celiac disease and gluten sensitivity. Deborah brings a diverse background in advertising, marketing and event planning to CDF. She previously served as CDF’s Director of Marketing.

Deborah provides senior leadership and strategic direction for CDF fund raising campaigns and special events. During her tenure as Director of Marketing at CDF, fundraising campaign revenues have increased by 600 percent through program expansion and business development. Deborah’s effective strategies and implementation have helped to raise the profile of the organization on a national level. In support of the CDF mission, Deborah has identified and cultivated relationships in the healthcare and lay communities, as well as food manufacturing and food service industries. She is responsible for the planning and management of CDF’s National Education Conference and Gluten-Free EXPO, which draws national attendance and features lectures from the nation’s leading medical experts in celiac disease in addition to a vast array of exhibitors.

Email Deborah at

imageGillian Entin, Development Coordinator

Gillian Entin is the Development Coordinator at Celiac Disease Foundation. She is responsible for planning and implementing social media campaigns, special fundraising events and sponsor relationships. Gillian also manages Team Gluten-Free, CDF’s Peer to Peer community fundraising program and Celiac Disease Foundation U, CDF’s nationwide college chapter program. Gillian brings her experience in marketing, event planning and fundraising to her work at Celiac Disease Foundation. Celiac disease is a topic that Gillian is personally passionate about since being diagnosed 4 years ago. She is dedicated to CDF’s mission to increase awareness and advancement of research so that the 2.5 million people still suffering can reach a diagnosis.

Gillian spent three years as the President of Arizona Public Interest Research Group, a non-profit through University of Arizona before moving back to California where she ultimately earned her Bachelors Degree from California State University, Northridge. A licensed EMT, Gillian is still very involved in the medical community, volunteering as emergency medical help for marathons and events in her spare time. Gillian is thrilled to be able to combine her professional experience with her dedication to celiac awareness to work with CDF to make a difference in the celiac community.

Email Gillian at


Talia Hassid, Community Coordinator

Talia Hassid is the Community Coordinator at Celiac Disease Foundation. She is responsible for overseeing all internal and external communication throughout the Foundation, including policies and procedures, handbooks, training guides, newsletters, annual reports, press releases, blog posts, and more. One of her key roles is implementing a communications strategy to support the Foundation’s programmatic and fundraising initiatives through media outreach, website management, social media, and publications. Talia also works with CDF Chapters and Support Groups to strengthen community-level support and involvement around the country.

Talia recently earned her Master’s in Public Health from Touro University, and is excited to pursue a career in the gluten-free and celiac world. Since her diagnosis in 2011, she has been an active member in the gluten-free community and has become a zealot for gluten-free living. Talia is passionate about helping others live happily gluten-free, and is thrilled to be involved with Celiac Disease Foundation to help advocate for celiac disease and increase public awareness for our cause.

Email Talia at

saul-geller-smallSaul Geller, Medical Writer

Saul joins CDF as INSIGHT Editor and Medical Writer.  A recent graduate of the University of Arizona, Saul received his Bachelor of Science in Biochemistry and Molecular and Cellular Biology, with a minor in Mathematics.  With a brother with celiac disease, Saul is a strong advocate for advancing research to improve the quality of life for all people affected by gluten-related disorders.

Email Saul at

Marianne Brooks, National Education Conference Volunteer Coordinator

Marianne Brooks is the Volunteer Coordinator for the CDF National Education Conference and Gluten-Free EXPO held each spring in Los Angeles, CA. Marianne was diagnosed with celiac disease in 2006 and has been involved in CDF activities since that time. She currently owns a small business in the South Bay, CA, and prior to this, spent 28 years in a Global Telecommunications company as the Director of Service Delivery. Marianne is very involved in her community, serving as an emergency room volunteer at a local medical center, and a volunteer at a Feed the Needy program. Marianne’s professional experience combined with her passion for celiac awareness and serving the community brought her to her role at CDF.

To be a National Education Conference Volunteer, email Marianne at

Justin Tsui, TeamLogic IT

Justin and his TeamLogic IT staff provide CDF with in-depth experience and insight in IT strategy development and management. Passionate about non-profits, TeamLogic IT brings clarity, simplicity and coherent IT strategy and solutions to CDF, lowering overall operational costs and optimizing operational efficiency.

Justin holds a Masters Degree in Electrical and Computer Engineering from the University of California, Irvine, specializing in distributed and fault tolerant computing.


TeamLogic IT is a nationwide network of computer consultation and managed services businesses providing outsourced IT services to thousands of businesses throughout the United States. The company addresses the needs of most computer networks and systems and strives to become the “IT Partner” for small and medium-sized business customers.