[1] After leaving Parliament, Power worked for ten years at Westpac, including as acting chief executive.

He was chief executive of TVNZ from 2022 to 2023, during the period when it was floated that the state-owned television network merge with Radio New Zealand.

[6] After leaving university, Power worked as a lawyer for Fitzherbert Rowe in Palmerston North, and for a brief period for Kensington Swan in Auckland.

In May 2004, Power caused controversy for his statement that (as regards defence and foreign affairs) "where Britain, the United States and Australia go, we go".

[19] In December 2011 Power was granted the right to retain the title of The Honourable[20] in recognition of his term as a Member of the Executive Council of New Zealand and became The Hon.

[23] In 2019 Power completed a master's degree in political science at Victoria University of Wellington, with a thesis comparing two US elections.

[26][27] Power told an interviewer in July 2023 that part of the reason he had left TVNZ was to commence research for his PhD in American politics.

Power said that he planned to holiday in "...California, Washington DC and New York..." then undertake archival research "...focusing on four U.S. Presidents and their paths as governors or through the Senate.