One of the toughest critics of Wall Street will soon be policing it.

Massachusetts Senator-elect Elizabeth Warren has been tapped for a seat on the Senate Banking Committee, the Senate Democrats' steering committee announced Wednesday.

Warren, a long-time Harvard Law School professor with expertise in bankruptcy and personal finance, was instrumental in the creation of the Consumer Financial Protection Bureau. Opposed by Wall Street lobbying groups, the bureau was created to protect Americans from unfair lending practices and bring transparency to financial products like home loans and credit cards.