P.R. firms seeking CSR specialists

In a sure sign that the CSR field is growing, two public relations firms are looking for CSR managers: Burson-Marsteller is looking for a CSR manager on a "premier global technology account" based in its San Francisco office; Fleishman-Hillard (whom I've never heard of) wants an "experienced communications counselor" at their headquarters in St. Louis to work with "clients in all focus areas that comprise CSR, with an emphasis on sustainability and corporate climate response".