Dan has served as the Executive Director of Community Legal Aid Society, Inc. (“CLASI”), Delaware’s largest and oldest civil legal services provider, since July 2015, where he oversees a staff of over 80 and a budget of over $14,000,000. Dan has been an attorney at CLASI since his graduation from law school in 1990. CLASI has been named a Top Workplace in Delaware nine out of the last eleven years and has been the highest rated non-profit with fewer than 100 employees twice.  

Dan is an adjunct professor at Widener University Delaware Law School where he has co-taught classes in poverty law, disability law, law and inequality, and medical-legal partnerships.

In 2015, Dan was honored by the ACLU-Delaware with the Gerald E. Kandler award for outstanding leadership in the cause of civil liberties. In 2016, he received the National Center for Medical-Legal Partnerships Distinguished Advocate award for his contribution to the research, policies, scaling and education that support the advancement of the Medical-Legal Partnership movement nationally. In 2023 the News Journal named Dan one of Delaware's Most Influential Lawyers. 

Dan has co-authored articles in newspapers, law reviews, and public health journals relating to poverty, inequality, and leadership.