Dan O'Brien is an American politician known for his service in the state of New Hampshire. He has held various positions, including serving as a member of the New Hampshire House of Representatives. O'Brien is recognized for his commitment to public service and has been involved in local and state issues throughout his career. In addition to his legislative work, O'Brien has also been active in the Republican Party. He has participated in various community initiatives and has worked to promote policies that align with his political beliefs. His contributions have made a significant impact on the political landscape in New Hampshire.