Sidley Austin LLP > Los Angeles, United States. Results. Sidley Austin … Richard S. Petretti is joining the Media and Entertainment Group as partner to work out of the Century City office. Results. Petretti is a greatly experienced finance lawyer, focusing his work on transactions in the media and entertainment industry as well as leveraged financings. Results. Sidley Austin LLP or Sidley as it is usually referred to, is a US law firm with an international presence through offices in Chicago, Los Angeles, Dallas, San Francisco, New York, Palo Alto, Boston, Houston, Century City and Washington D.C. in the US; Brussels, London, Munich and Geneva in Europe; and Beijing, Tokyo, Hong Kong, Singapore, Shanghai and Sydney in the Asia-Pacific region. Century City – Sidley is pleased to announce that Maureen Gorsen has joined the firm in Los Angeles as a partner in its Environmental practice. KVTA. Sidley Austin LLP Los Angeles, CA. Alternative/hedge funds. The group includes Michael Mallow, Livia Kiser, Mark Campbell, one counsel and two associates, according to a press release from the firm.