During the financial crisis of the late 1980s and early 1990s, Greenan recovered more than $100 million for depositors from the owners and professionals of failed financial institutions. In 1999 Greenan joined Central Dallas Ministries to serve the community as a public interest attorney, and to provide the organization with general counsel services. Since 2001, Greenan has been the Executive Director of Central Dallas Community Development Corporation. His expertise in the analysis of complicated financial real estate transactions is an essential component of Central Dallas CDC’s expansion into the affordable housing arena.