Kean Miller grew up around the chemical, oil and gas industries in Louisiana. As the needs of its clients have changed, so has the firm’s expertise. “We have developed our practice areas around our clients’ needs,” said partner Blane Clark Jr. “We try harder to please the client.”

It appears to be working. Olin Corp., which manufactures chemicals and ammunition, started using Kean Miller on litigation it inherited when it acquired Pioneer Cos. Inc., which manufactures industrial bleaches, in 2007, said Stuart Roth, senior deputy general counsel and vice president. Olin has used the firm ever since.