About us

Our journey began in April 1999 as a small, personalised accounting firm. Over the years, we’ve evolved into a modern advisory practice while staying true to our client-first approach.

In early 2026, we embraced a new name, One Twenty, a tribute to our first office at 120 Prince Street, Grafton. This change reflects our heritage and our vision for the future: grounded in experience, focused on progress.

Today, we’re a dynamic team dedicated to strong communication, practical solutions, and proactive advice. Our goal is simple: help you make confident decisions and achieve sustainable growth. For us, it’s about more than just tax.

Our Offices

Grafton

146 Fitzroy Street, Grafton, NSW, 2460

(02) 6642 5900

Monday to Thursday 8:30am to 5:00pm
Friday 8:30am to 3:00pm

Maclean

30 River Street, Maclean, NSW, 2460

(02) 6645 1880

Monday to Thursday 8:30am to 5:00pm
Friday 8:30am to 3:00pm

Woolgoolga

COMING SOON

Gold Coast

Wotso Workspace, Level 2, Robina Town Centre, Robina, QLD

0412 282 280

By Appointment Only

Our Team

Casey Waite
Bookkeeping Team Lead

casey@one20.com.au

Casey Waite
Bookkeeping Team Lead

Casey leads our growing bookkeeping department with expertise and enthusiasm, bringing a wealth of knowledge and a passion for precision. Known as our resident Xero specialist, Casey ensures seamless financial processes and supports the team in delivering exceptional service.
Outside of work, Casey enjoys quality time with family and cheering on their sporting pursuits, balancing a busy professional life with an active home life.

casey@one20.com.au

Christine Stephenson
Senior Accountant

christine@one20.com.au

Christine Stephenson
Senior Accountant

Christine helped form One Twenty back in 1999, she’s been here since the start. In recent years, Christine has centred her interest on the audit side of things, specifically around trust account audits and SMSF’s. Outside of work, you’ll find Christine on the golf course or away in the caravan, road tripping around Australia.

christine@one20.com.au

Debbie Day
Senior Accountant & Tax Specialist

deb@one20.com.au

Debbie Day
Senior Accountant & Tax Specialist

Debbie has been part of our team for over 20 years, making her one of the longest continuously serving member. She’s seen it all—our growth, rebranding, and moves to new premises—and her experience is a cornerstone of our success. Known for her incredible knowledge of random ancient history facts, Debbie is always ready to share something fascinating. When she’s not at work, you’ll find her enjoying the beach, fishing, or spending quality time with her grandchildren.

deb@one20.com.au

Elissa Griffiths
Office Manager

elissa@one20.com.au

Elissa Griffiths
Office Manager

Elissa is the friendly, new face of our admin team. She joined the One Twenty team in early October as our Administration Assistant and is always happy to help keep things running smoothly. Outside of work, she spends her time chasing after a lively toddler and soaking up the coastal beauty at Brooms Head.

elissa@one20.com.au

Ellen Moloney
Senior Accountant

ellen@one20.com.au

Ellen Moloney
Senior Accountant

Ellen is one of our senior accountants, with over a decade of experience in compliance services. She brings deep expertise and a strong commitment to client success.

Outside of work, Ellen enjoys spending time with her grandkids, as well as sewing and creating beautiful handmade pieces.

ellen@one20.com.au

James Gorrie
Partner & SMSF Specialist

james@one20.com.au

James Gorrie
Partner & SMSF Specialist

A born and raised local, James began his career as an accountant in Brisbane before returning home to join One Twenty. Now a Partner & Senior Accountant and fully qualified Chartered Accountant, he specialises in tax, small business advisory, and SMSF accounting. Outside of work, James enjoys playing soccer and spending quality time with his young family.

james@one20.com.au

Kim Darby
Office Manager

kim@one20.com.au

Kim Darby
Office Manager

Kim is one of the friendly, welcoming faces of our admin team and has been an integral part of One Twenty for several years. She keeps everything running smoothly behind the scenes and ensures our clients always feel at home.

Outside of work, Kim loves spending time with her grandkids and keeping active—whether that’s chasing them around or enjoying a casual 5km run.

kim@one20.com.au

Mackenzie Gooley
Marketing Manager

mackenzie@one20.com.au

Mackenzie Gooley
Marketing Manager

Mackenzie joined the One Twenty team in July of 2025, working part time whilst she finishes her marketing degree. Mackenzie has a passion for all creative things and has played a crucial role in the rebrand from Stephenson Partners to One Twenty. Outside of work, Mackenzie enjoys relaxing at the beach and hanging out with friends and family!

mackenzie@one20.com.au

Mark Stephenson
Managing Partner & Business Advisory Specialist

mark@one20.com.au

Mark Stephenson
Managing Partner & Business Advisory Specialist

As One Twenty’s Managing Partner, Mark works closely with business owners to help their ventures grow and prosper. He has a particular passion for supporting businesses in their start-up phase, offering practical advice and strategic guidance to set them up for success. Outside the office, you’ll find Mark enjoying a beer with friends and family, following his kids across the countryside for sport, and relaxing by the river.

mark@one20.com.au

Sean Corcoran
Senior Accountant

sean@one20.com.au

Sean Corcoran
Senior Accountant

Sean grew up in Coffs Harbour and has over 15 years accounting industry experience within public practice that has ranged from corporate recovery to business advisory specialisations. Sean has recently joined One Twenty, where he has continued to find great enjoyment in solving problems and assisting clients along their journey. When Sean isn’t crunching numbers he enjoys hitting the open road for new camping adventures and spending time wrestling his two young boys

sean@one20.com.au

Shahnee Searle
Bookkeeper

shahnee@one20.com.au

Shahnee Searle
Bookkeeper

Shahnee has recently joined the One Twenty team as Bookkeeper, ensuring our clients’ accounts are always in perfect order. When she’s not balancing the books, Shahnee is kept on her toes by her two young kids, unwinding with a cocktail or soaking up the sun at the beach.

shahnee@one20.com.au

Stacey Vallette
Bookkeeper & Office Manager

stacey@one20.com.au

Stacey Vallette
Bookkeeper & Office Manager

Stacey first joined One Twenty as a full-time admin assistant and quickly became the glue that held everything together. These days, she’s rocking a unique combo: part-time office manager and full-time bookkeeping assistant. Off the clock, Stacey’s life used to revolve around kids’ cricket matches (she practically had a permanent seat at the oval). Now, she’s swapped the junior league for following her husband’s cricket adventures.

stacey@one20.com.au

Tania Disson
Bookkeeper

tan@one20.com.au

Tania Disson
Bookkeeper

Tan started with us back in 2000, she’s one of our longest serving team members. Tan has progressed from office admin to personal assistant to now her new role within the bookkeeping team. We love hearing kind words from our clients about their experiences with Tan, and her infectious & bubbly personality. Outside of work Tan enjoys spending time with her growing family, and friends.

tan@one20.com.au