Google Inc. (GOOG) said on Tuesday that George Reyes plans to retire as chief financial officer by the end of the year, and that the company will begin a search for a replacement.

Reyes, 53, has served as CFO of Google, the world's leading provider of Web search and online services, since 2002. He helped spearhead the company's initial public offering in August 2004.

A veteran of Silicon Valley high-tech companies, Reyes previously served as interim CFO of optical networking equipment company ONI Systems before it was sold to Ciena Corp (CIEN) in 2002.

For 13 years, he held various financial executive positions at computer maker Sun Microsystems Inc. (JAVA).

Reyes serves on the board of directors of two Silicon Valley-based software makers: Symantec Corp (SYMC) and BEA Systems Inc (BEAS).