DALLAS and RIO DE JANEIRO, March 5, 2013 /PRNewswire/ -- Haynes and Boone, LLP and MMA Lawyers of Brazil announced today that they have begun working together under a cooperation agreement to serve clients in Brazil, the United States, China and around the world. Under this new arrangement, Haynes and Boone clients will benefit from the experience of MMA inside one of the world's strongest emerging markets with a vibrant energy base and growing trade links to Texas and the rest of the U.S. MMA's clients, meanwhile, will benefit from having access to the breadth and depth of the Haynes and Boone U.S. and international practices outside of Brazil. "Teaming up with MMA is a big step toward maintaining our identity as one of the top international law firms with a focus on Latin America," said Haynes and Boone Managing Partner Terry Conner. "This helps us to provide an expanded array of services to a broad range of new and evolving clients. The announcement today is the culmination of more than two years of work, and is an important enhancement to our well-recognized Latin American practice." Said Marcelo Mello, MMA Lawyers managing partner: "It is with great pride that we formalize our already strong relationship with Haynes and Boone. Through such cooperation, our firms will provide an extraordinary level of service to sophisticated multinational clients from the U.S. and beyond. As founder of this firm, I could not be more proud." The cooperation agreement will allow MMA and Haynes and Boone partners to work together closely, although the firms will remain independent. Encompassing more than 20 years of experience in operations and projects for various multinational companies and industries, MMA Lawyers is active in more than 30 countries across the Americas, Europe, Asia and Africa. MMA Lawyers combines lawyers from leading businesses and law firms from Brazil in a multidisciplinary team of practical experience gained through decades of cross-border projects, bringing together a range of practice areas such as civil law, tax, regulatory, corporate, environmental, labor and employment, litigation, arbitration and dispute resolution. Prior to forming his own firm, Mello was for nearly two decades the international legal division manager for Petrobras, the state-owned Brazilian petroleum and energy company. Petrobras currently ranks as the world's fifth-largest oil producer by market value.