A senior manager at ValueClick, Inc. has been elevated to head the online marketing company. Tom A. Vadnais replaces long-time CEO James R. Zarley who has been named as executive chairman of the board of directors for the Westlake Village company. Vadnais has served on the board of directors since October 2001. He has also held various senior management roles in the company, including president of U.S. operations. As executive chairman, Zarley will be focusing primarily on ValueClick’s strategic direction and the gradual management transition of the company’s operations. “Jim and I and the rest of the team have worked hard to make ValueClick one of the largest and most comprehensive online marketing companies in the world, and I welcome the opportunity to help lead ValueClick during this exciting time for the company and the industry,” Vadnais said. “My focus will be on continuing ValueClick’s successful track record and capitalizing on the opportunities that exist for all of our businesses.” Vadnais joined ValueClick in 2001 after the company acquired Mediaplex, where he served as president, chief executive officer and a member of the board of directors.