Williamson only averages 15.75 with the bat at a strike rate of 99.32 from 36 Twenty20 matches, but said his bowling had clearly helped his selection in the national side.
"I think just pretty much that all-round option in that shorter form and hopefully a batting role through the middle," he said of what he could bring to the mix.
"You always want to bat as high as you can in Twenty20 stuff. But there's obviously some really good players in the team that have cemented their spots. So hopefully doing a job in the middle would be nice."
Williamson's only international Twenty20 appearance was against Zimbabwe last October, where he wasn't required with the willow.
During the summer he made 93 runs from five innings for Northern Districts at an average of 18.60, with a top score of 53.
But, if anyone was in doubt over the young gun's ability to score quickly they only need to look to his last appearance in a one-day international where he smoked a 69-ball century against Zimbabwe in Bulawayo in October.
In that game though, Williamson's innings was overshadowed by the home side as Malcolm Waller guided them to an upset one-wicket win with an unbeaten 99 from 74 balls as they chased down New Zealand's total of 328-5.
Williamson said that last-over loss served as a reminder that Zimbabwe could pose a challenge.
"They certainly have a small group of players in their side and all of them potentially can perform really well and that's probably the main thing with their side at the moment. We know if we play well we can beat them and do that well. But, I think it's important we certainly bring our A-game every game against them because we saw, Brendan Taylor and players like that - Waller in the last series - they played really well."
In the three one-dayers the sides contested in Zimbabwe in October, Taylor produced scores of 128 not out, 107 not out and 75 as he become the first player from the African nation to make consecutive international centuries in 50-over cricket.
Much has been said about Zimbabwe's inability to compete following their innings and 301-run loss during the one-off test against New Zealand in Napier during the weekend, but Williamson they were an ideal warm-up opponent before the kiwis meet South Africa next month.
"I think [we should be] looking to keep improving. I know we've been playing some good cricket, especially in the test format, but it's important we keep improving because the South African side coming over is going to be strong and we need to up our game."