Formerly Labour spokesman of Police, Forestry and Economic Development, Mr Nash said he was also excited to undertake his small business role.
"Small businesses are the backbone of the New Zealand economy and I'm really keen to make sure we provide the right level of support and have got the regulatory environment right so small businesses can optimise all their opportunities."
Previously Labour spokeswoman for local government and associate spokeswoman for primary industries and food safety, Ms Whaitiri said she was pleased with her roles; most notably Associate Minister for Agriculture because she had kept an eye on a primary industry role for some time.
"I'm very pleased to retain some areas around farming and, I'd argue, horticulture as well which is prevalent in our region."
Ms Whaitiri said being Minister of Customs would serve as a new challenge for her.
"I've never worked in the Customs space but I've been a senior public manager so I know how the public service operates.
"We've got to ensure we have a very robust Customs system in our country and I'm looking forward to being briefed by the ministry as to how they do it."
The re-elected Ikaroa-Rawhiti MP said her focus on building affordable homes for those in her electorate would be delivered through Ms Ardern's election trail pledge to build 240 homes in Hastings and Napier.
"I feel very honoured and humbled to be appointed in a Jacinda-led government to bring about the changes that we all campaigned really strong on.
"I'm keen to make sure all our policies are shared equally throughout the country including my own electorate of Ikaroa-Rawhiti. My commitment is to advocate for the people of Ikaroa-Rawhiti who put me in this place."
Mr Nash said he wouldn't forget that he was "first and foremost" a member of Parliament for the people of Napier.
"In every single one of my portfolios there is relevance to Napier. If I get my way then I think that I'll work really hard to deliver some real wins for Napier.