In 2001, Menkin had a minor role for the television film
Wit. His film roles include
A Hologram for the King,
Octane,
Zero Dark Thirty,
Survivor,
Arthur Christmas,
The Man from U.N.C.L.E.,
Florence Foster Jenkins and the documentary
Project Nim. For many years he was provided the announcer voice for the Norwegian TV channel
TV3. He was a member of
Thomas & Friends's voice cast from 2013 until 2021 where he voiced Porter and Jack in the US version. He also voiced Stanley for Season 19 only, which was passed on to
Rob Rackstraw and
John Schwab. He was also asked to voice the title role of
Thomas for the US version after
Martin Sherman's departure from the series, but he passed on the offer, citing support for Sherman, so it passed on to
Joseph May instead. From 2015, he voiced
Virgil and
Gordon Tracy in the rebooted
Thunderbirds Are Go television series. In 2017, Menkin provided the voice for Chuck, who was one of
Space Chickens in Space's lead characters. On the Norwegian TV series
Lykkeland, Menkin plays Jackson. The series premiered on
NRK and DR1 October 2018. Lykkeland won Best Script and Best Music at Canneseries in April of the same year. Menkin stated that his role on
Lykkeland was his "first proper Norwegian acting job". ==Personal life==