It's the same generation who are commonly found on the company's buses, on the roads between New Zealand's main centres and tourist hot spots.
Nuttall says he takes the best graduates - he employed three in his latest intake in December - and teaches them the "Naked Bus way".
"Our business model is radically different from a lot of business models out there.
"We want people who are smart and have been taught to think, but not necessarily trained in other ways of doing things."
Naked Bus has taken the "agile" methodology commonly associated with IT projects and applied it to getting people around the country by bus.
Based on creating iterations of a product in short timeframes, agile development suits the company's need to launch new services as quickly and cheaply as possible.
Nuttall says it's about working smarter to drive down costs, with projects getting delivered in weeks rather than years.
That thinking has meant being first bus out of the station with an overnight sleeper service with lie-flat beds - common overseas but not available here until Naked Bus launched it in early summer.
It meant working fast to connect the website, suppliers, timetable and regulatory approval to create an early version of the product, then making snappy changes to things that didn't work.
"We don't want to mess around and miss an opportunity," Nuttall says.
Not missing an opportunity has meant rapid career growth for the likes of Whitney Peterson, 24, and Jay Narayan, 25.
Peterson boarded Naked Bus as an intern in late 2011 and the marketing and finance graduate soon went from answering the customer service phones to managing marketing.
As her role evolved to include managing relationships with its bus suppliers - the Naked Bus fleet is contracted from third parties, with about 100 drivers on various routes - staff management and HR, she morphed into the chief operating officer.
She has recently been headhunted from Naked Bus by her father, who has put Peterson in charge of expanding his convenience food brand, Leader Products, into Australia.
While it was challenging dealing with external suppliers who were decades older than her, she says putting out ideas, developing projects quickly and learning fast from mistakes suits the millennial generation, brought up in an environment of constant change.
She says millennials bring fresh thinking to a workplace.
"My generation is very technology driven, so we look at ways to automate things and using technology to support our processes.
"At Naked Bus we used to say if someone was repeating a job over and over and over again then we needed to look at a way of automating it."
Keeping on top of the technology falls to Jay Narayan who, like Peterson, joined as a graduate.
The company's reliance on technology to connect with its customers resulted in Narayan overseeing the creation of an in-house development team, ending the previous reliance on outsourced IT development.
While he admits the pace of change can sometimes be overwhelming, he has had opportunities some of his peers only dream of.
Narayan says if he'd followed the traditional developer path, he'd be sitting in a little cubicle developing code on an as-needed basis, without any involvement with the business or wider decision making.
Nuttall says he's open with staff about the nuts and bolts of the business.
"Jay understands what the revenue was last week, what our costs are, and so on. He understands the impact of the decisions he makes.
"He's not steering with one hand tied behind his back."
Nuttall, who began his working life as a management trainee, understands the frustrations some younger staff have with not having new ideas heard, or dealing with a hierarchical organisation.
"What the younger people tend to appreciate is there is no bullshit here."
Nuttall does admit that having such a youthful workforce is not without its challenges. He says there is a more collegial approach to work from his co-workers and often looks up from his desk to see four people huddled around a computer, pushing up noise levels in the office - "but the outcomes are amazing".
"Personally I'd prefer a quieter office but I'm not going to stop this work getting done."
