Douglas W. Elmendorf--a very important guy

"Elmendorf may be the most important financial analyst in America: his client list is all 535 members of the U.S. Congress. His job is to "score" or provide a cost estimate of important legislation wending its way through the House and Senate. His cost analysis can often make or break a bill's future."
Douglas W. Elmendorf - WhoRunsGov.com/The Washington Post

Others on the CBO Staff

In his own words (blog): "The United States faces daunting economic and budgetary challenges. The economy has struggled to recover from the recent recession: The pace of growth in output has been anemic compared with that during most other recoveries and the unemployment rate has remained quite high. Federal budget deficits and debt have surged in the past two years, owing to a combination of the severe drop in economic activity, the costs of policies implemented in response to the financial and economic problems, and an imbalance between revenues and spending that predated the recession. Unfortunately, it is likely that a return to normal economic conditions will take years, and even after the economy has fully recovered, a return to sustainable budget conditions will require significant changes in tax and spending policies."