"It's the stage of my career [where] I want to be playing the best I can and at the highest level I can. If I'm not up to playing for the All Blacks any more, then I will have to have a look at what I am up to."
Thomson has played 24 tests, including a handful at last year's World Cup, and his importance to the All Blacks has increased with Kaino's injury and imminent departure.
Blindside is his best position but he can play anywhere in the loose forwards and is a key lineout option. The Highlanders certainly rely on him heavily in this area, and against the Chiefs in the opening round of the season they threw to him 11 of the 12 times on their throw.
Victor Vito is growing into a good player and the fact he was called into the World Cup squad ahead of Liam Messam would suggest he's another strong candidate. Messam's lack of effectiveness at lineout time counts against him and Hansen might also contemplate employing an openside like Matt Todd or Sam Cane.
"It's sad to see Jerome go," Thomson said. "He's a close friend of mine and we have obviously had a lot to do with each other.
"He's obviously a world-class player and will be a big loss to New Zealand rugby and the All Blacks but these things happen and it's an opportunity for the rest of us. I'm sure one of us will step up and have a crack at it.
There are plenty of new faces in the Highlanders for today's game against the Rebels in Invercargill as they get to grips with their huge injury toll.
Thomson and fellow All Black Jarrad Hoeata return but they will have to do without All Blacks Colin Slade (broken leg) and Andrew Hore (calf) as well as openside John Hardie (toe) and lock Nick Crosswell (knee). These come on top of injuries to Lima Sopoaga (fractured scapula), Kenny Lynn (fractured neck), Siale Piutau (broken ankle) and wing Telusa Veainu (concussion).
"You never want to lose guys, especially your top players, but unfortunately it's nothing new to us," Thomson said.