Doug Mankoff is the CEO/Founder of Echo Lake Entertainment, which encompasses production, financing, and management. He founded the Entertainment company in 1997, after raising funds to finance and produce independent films with budgets of $5 million or less.

He has produced 24 films, beginning in 1998. Most recently, he has produced Truth (2015), Romeo & Juliet (2013), Nebraska (2013), The Numbers Station (2013), and Afternoon Delight (2013).

Nebraska was nominated for 6 Academy Awards and 5 Golden Globes. In 2002, Mankoff was nominated for an Independent Spirit Award for the film Things Behind the Sun (2001).