Google Search Chief Amit Singhal

John Giannandrea, currently a vice president of engineering, will replace Singhal, a 15-year Google veteran, once he leaves on February 26.

As one of Google's earliest search pioneers steps down and the company's leader in artificial intelligence takes his place, analysts say the move signals the company's desire to make its search engine more sophisticated.

As one of Google's earliest search pioneers steps down and the company's leader in artificial intelligence takes his place, analysts say the move signals the company's desire to make its search engine more sophisticated.

John Giannandrea, currently a vice president of engineering, will replace Singhal, a 15-year Google veteran, once he leaves on February 26.

As one of Google's earliest search pioneers steps down and the company's leader in artificial intelligence takes his place, analysts say the move signals the company's desire to make its search engine more sophisticated.

As one of Google's earliest search pioneers steps down and the company's leader in artificial intelligence takes his place, analysts say the move signals the company's desire to make its search engine more sophisticated.