For many years Paterson would fill up the food parcels and then carry them out to the cars of those in need. But she isn't strong enough for that any more.
"I would have conversations with them. People have had hard times - and you listen to their stories and give them a big hug.
"I enjoy helping where I can, and giving back to the community I love so much."
Nowadays it is her job to measure out and distribute ingredients - like rice and flour - into each parcel.
And Paterson said she didn't plan on stopping her volunteer work any time soon.
"I absolutely love it, I will keep going as long as I can. My family thought I was going to stop last year, but I am still here," she laughed. "It gives me a great pleasure to do this and it is fulfilling my life.
"I am a bit slower, and a bit wobbly sometimes but that's what you get when you are this age."
When asked about the biggest change over the past 29 years, Paterson said it was the increasing number of people who relied on the service. She didn't see the demand reducing any time soon.
"There doesn't seem to be any let-up at all. It makes me sad in a way, because it shouldn't be. People should be getting enough money to pay for themselves and feed their families," she said.
"It is going to go on for years. I think it is a very important service."
Volunteering aside, the great-grandmother also kept herself busy with weekly bowls, gardening club and spending time with friends and family.
"I enjoy life, and I keep myself busy. But I do enjoy getting home and putting my feet up for a little while," she said.
While Paterson had a big birthday party earlier this month with 60 or so guests, she also had plans to spend this week celebrating.
Tauranga Community Foodbank general manager Nicki Goodwin said volunteering was just part of Paterson's "caring nature".
And she was the type of person to go "above and beyond" what was expected of her.
"You wouldn't guess she is 90. She should be very proud of what she has done for the community."
The Tauranga Community Foodbank was created in 1991, celebrating its 30th birthday earlier this year.
It first started to address an immediate need for centralised food support in Tauranga. This was led by local churches and passionate community members.
Over the past 30 years, about 160,000 local households have relied on the foodbank for support.