Sizmek, a developer of digital advertising technology, said this week that it has named Patrick Meehan as head of Sales in its Los Angeles office. The company--which is based in New York--has around 40 employees in Los Angeles. Meehan was previously Director of Agency Sales and Account Management at DoubleClick. Sizmek focuses on open ad management, helping to manage online advertising campaigns for advertisers and agencies. Los Angeles is a major center for online advertising, with other companies like OpenX, Convertro, Frequency, Rubicon Project, Airpush, ReachLocal, and many, many others in the industry based in the region.