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Our people

The team behind the advice

A long-tenured team of chartered accountants, accountants and administrators — many with strong farming roots of their own.

The R J Preston Ltd team

Meet the team

12 specialists, one standard of care

Select any of the team to read more about their background and the work they do.

James Cooke

James Cooke

Director

James joined R J Preston Ltd in 1993 and became a Director in 2004. He has over 30 years of accounting experience in agribusiness. Prior to joining the firm, he worked as a farm manager both in New Zealand and overseas.

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Grant McCulloch

Grant McCulloch

Director

Grant joined R J Preston Ltd in 2009 with a view to specialise in the farm accounting sector. He is a Chartered Accountant with a Bachelor of Commerce (Hons) from Lincoln University, and grew up on a sheep farm in Glenavy, South Canterbury.

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Chathu Wattage

Chathu Wattage

Director

Chathu has over 10 years of experience across Accounting and IT. She joined the team in 2013, became an Associate in 2021, and a Director in 2024. She holds a postgraduate qualification in Accounting with a NZICA excellence award, and leads our software and systems support.

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Joanne Patterson

Joanne Patterson

Accountant

Joanne joined R J Preston in 2011 after completing a commerce degree at Canterbury University. She prepares GST, PAYE and RWT returns and annual accounts, and administers the provisional tax system.

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Nikola Murphy

Nikola Murphy

Accountant

Nikola gained a Bachelor of Commerce with Honours from Lincoln University in 2007 and joined R J Preston Ltd in 2012 after working for commercial accounting firms.

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Hannah Jones

Hannah Jones

Accountant

Hannah has 18 years of accounting experience, joining R J Preston in 2001. Her responsibilities include annual financial statement preparation, GST returns, client liaison, ACC, FBT and IRD queries.

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Jan-Liselle Mann

Jan-Liselle Mann

Accountant

Jan joined R J Preston Ltd in 2018 with over 25 years' experience in accounting and banking. Her duties include preparing financial statements, tax returns and GST returns.

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Abby Ng

Abby Ng

Accountant

Abby joined R J Preston in 2023. A member of ACCA since 2010, she has 7 years' experience in public practice in New Zealand and as an external auditor in Malaysia.

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Ye Lin Kyaw Sai

Ye Lin Kyaw Sai

Accountant

Sai joined R J Preston Ltd in 2022, holding a Bachelor's in Accounting and a NZ Diploma in Agribusiness, with over 12 years' experience in NZ farming, including managing a dairy farm.

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Michaela Sandilands

Michaela Sandilands

Administrator

Michaela joined R J Preston in June 2019 as an Administrator. She is responsible for invoicing across the firm and is the AML Compliance Officer.

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Gail Peacock

Gail Peacock

Office Administrator

Gail joined R J Preston Ltd in January 2022 as an Office Administrator, with over 20 years' experience in the banking industry.

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Cathy Johnston

Cathy Johnston

Receptionist / Typist

Cathy joined R J Preston in 2021 as Receptionist/Typist, bringing over 20 years of experience working in farm accounting practices.

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Talk to your rural & commercial accounting specialists

Book a free consultation with R J Preston Ltd. Send us an enquiry and we will be in touch shortly.