About Us

The Arc is the world’s largest community-based organization for people with intellectual and developmental disabilities (IDD). With over 660 chapters across the US, our history, stability, and expertise are well documented. The Arc of Northern Virginia local chapter was established in 1963 and continues to be a leader in advocating and supporting people with disabilities and their families.

The Foundation of The Arc of Northern Virginia oversees a 501(c)(3) Special Needs Trust (SNT) Program. The Trust Team handles the day-to-day management of SNT for our beneficiaries and their families.  We offer continuity, reliability, and expertise while providing exceptional trust management services to individuals with all disabilities in Virginia, Maryland, and Washington DC.


Photo of Tia Marsili

Tia Marsili
Director of Trusts


703-208-1119, Ext 115

Tia oversees the Trust department and will be your first point of contact for new trusts.

She works with families, individuals, agencies, and attorneys throughout Virginia, Maryland, and Washington, DC. She specializes in educating the community, various organizations, and agencies about comprehensive Futures Planning and Special Needs Trust (SNT) services.

Tia is a professional with over 23 years of experience in the world of disabilities. She's the mother of two daughters with disabilities. She works one-to-one with families and individuals to plan futures and establish SNTs.

She is multi-lingual, well-traveled, and has a passion for creating systems that provide equality.

Photo of Tia Marsili

Evelyn Gu
Assistant Director


703-208-1119,  Ext 103

Evelyn maintains the systems and documents supporting the SNT program. She offers Trust clients daily on-site and over-the-phone support by providing personal contact with families and individuals, troubleshooting Trust account issues, and processing Trust checks and documentation.

With a background in psychology and business operations from the University of Virginia, Evelyn has worked to support efficient, high-quality service delivery for various clients.

She enjoys helping individuals and families receive the necessary information and tools they need to plan for the best possible future outcomes.

Photo of Trinitas Nsabimana with a white background

Trinitas Nsabimana
Account Manager


703-208-1119, Ext 119

Trini is your point of contact for special needs trust spending requests.

She provides on-site and phone support to clients every day. She works closely with our clients to ensure they have timely and effective access to funds. That helps clients pay for the services they need, such as medical, dental, and vision care, vacations, clothing, furniture, and utility bills.

Trini holds a Master's Degree in Business Administration from the University of District of Columbia and has extensive experience working with a variety of clients in different sectors.

Allie Shelby
Dir. of First Impressions


703-208-1119, Ext 101

Allie provides support to the trust team to ensure smooth operations. She schedules appointments, types trust legal documents, organizes and hosts trust workshops, and helps prepare marketing materials for outreach events. She answers the phone and helps keep our clients up-to-date regarding our upcoming information sessions. She also assists with other office tasks to make sure the trust department runs efficiently to meet client needs.

Allie attended the Woodrow Wilson - Wilson Workforce and Rehabilitation Center and got her certification for Administrative Assistant.

Photo of Tia Marsili

Sally Wilklow


(703) 309-9349

Sally serves as a contract Advocate for The Arc and is passionate about helping people live their best lives.  She has over 30 years of social work experience working with diverse populations including at-risk youth and families, students receiving special education, mentally ill adults and medically fragile seniors.  She received a BA in psychology and sociology from Union College and an MSW from Virginia Commonwealth University.

She also has personal experience with disability and navigating the many challenges and services that go along with it.  She and her husband raised their daughter, Hannah, who had severe and profound disabilities, until she passed away at the age of 12.

Sally recognizes a strength-based approach with emphasis on self -determination as the key to successful advocacy.  The process begins with a thorough assessment of the client’s current situation to identify issues and needs, resources and strengths.  Clients are guided in developing a realistic short- term or long-term plan that includes concrete goals and strategies while accessing available community resources.  You can contact Sally for a brief consultation regarding how advocacy might benefit you and your loved one.

Portrait of a woman against a light background

Karyn Tan
Project Coordinator


703-208-1119, Ext 120

Karyn works directly with each Trust team member with a focus on targeted outreach, social media and marketing support. She also supports the team on database refinement and trust review.

Karyn has over 15 years of experience in brand management, content creation and corporate communications. She achieved communications goals working across diverse cultures in the United States, Europe, Asia Pacific, China and Singapore.

Her nonprofit journey started at the historic Athens Panathenaic stadium for the 2011 Special Olympics World Games, surrounded by 7000 joyous people with intellectual disabilities. The experience of promoting stories of inclusion altered Karyn's worldview and strengthened her belief in the abilities of every person. Since then Karyn has accumulated deep experience in nonprofit and disability-related content marketing at the state and international levels.