InfoSpace has been going through a number of transformations lately, namely the company’s $287 million acquisition of TaxACT. Now, here’s another big change.

Travis McElfresh, who joined the Bellevue Internet search company as chief technology officer in 2010, plans to step down effective March 23. No reason was given for the departure, which was disclosed in a SEC filing today.

McElfresh is a technology veteran who previously served as vice president of technology at msnbc.com and CTO of Craig McCaw-backed startup Onecast.

He holds a geology and geophysics degree from the University of Wyoming, and an MBA from the UW.

InfpSpace, which operates search engines such as Dogpile and Metacrawler, employs about 200 employees. Shares of InfoSpace are up more than 40 percent over the past year, but were down two percent in trading today.

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