About Us

A dedicated team you can rely on.

We can relate to business owners because we've all been business owners ourselves.

It is to our advantage that our employees are all Central Otago locals, so we understand and recognise how change and growth has affected our district and the businesses and families who live here. We have formed many great relationships with our clients because they know and trust us.

We understand the importance of being able to have face to face meetings sometimes. Lucky for you, we have our own office with a boardroom with all the trimmings (including a coffee machine!) AND parking in the industrial area of Wanaka. You can pop in anytime to catch up with us and have a coffee and a chat. You can even hire our boardroom for client meetings.

Meet the Mighty Efficient team

Mighty Efficient - Bronwyn McCarthy

Bronwyn McCarthy

Bronwyn started Mighty Efficient in 2012, identifying the Wānaka region’s need for a quality, reliable, bookkeeping service using new Xero accounting technology. Mighty Efficient has been the area’s number one booking service for a number of years, just ask a local. This is due to Bronwyn’s work ethic and ability to relate with everyday kiwis involved in business, just like she is.

She is the Otago Regional Director for the Institute of Certified New Zealand Bookkeepers, which brings new and experienced bookkeepers together to socialise and talk all things bookkeeping.

Bronwyn is also involved in her husband’s hunting and tourism business, Lake Hawea Hunting Safaris. She assists various local non profit organisations free of charge and is Mum to four amazing girls which means being time efficient is a necessity for Bronnie!

Once the tools are down you will find her out on the lake with her family, a glass of wine in hand, paddle boarding, at the gym, or running kids around.

Mighty Efficient - Jess Schmelz

Jess Schmelz

Jess is our in house tradie lady, with years of experience behind her she brings valuable knowledge of all things Trade. Her arsenal of qualifications includes being an ICNZB Certified Bookkeeper, NZQBA Qualified Bookkeeper, Xero Certified, Payhero Certified, and on top of that she is currently studying for a Diploma in Business majoring in Project Management via correspondence.

Jess’ background includes Managing Shooters bar for over 10 years, winter seasons at Cardrona and Coronet peak in Race & Events crew and Mum to two gorgeous boys.

If she’s not in the office, you’ll find her on the slopes, on the water in her yacht, paddleboarding, or laying on the beach with a glass of Rosé in her hand.

Cate Howie

Cate is the first face you’ll see when you come in the Mighty door, as our front desk lady she doubles as a Bookkeeper, Admin and often Graphic Designer. Having completed her study to become a NZQBA Qualified Bookkeeper, Xero and Workflow Max Certified she’s now working towards becoming ICNZB Certified. In her previous life, Cate completed her Diploma in Film, Certificate in Makeup Artistry in Melbourne, was the Acting Manager at Luggate Pub, and groomed at an Olympic Eventing yard in Cambridge.

She’s a Volunteer Firefighter for the Luggate Brigade, on the Livestock Committee for the Wanaka A&P Show and Volunteer coaches for the Hawea-Wanaka Pony Club.

Cate will likely be found with her horses, fishing, hunting, in the garden, or enjoying a cold cider.

Belinda Stewart

Belinda (or B as we call her) is our gorgeous bill entry queen. B floats in and joins us three days a week whilst juggling a busy family life with 3 young handsome boys. B brings a wealth of knowledge having previously studied Bachelor of Commerce at Otago University, majoring in Marketing and Tourism, then moving to Melbourne for 7 years to complete a Postgraduate Diploma in International Business, going on to work in a number of corporate roles during her time in Australia.

Married life then began, which saw her move back to NZ and start a family. This brought another change of path to fit in with family life and she helped her husband in his newly formed building company and became a NZQBA Qualified Bookkeeper. B has been with us since 2019 with a quick break in-between to have her third child.

In-between bill entry you’ll find her chasing after her rugrats, out on the lake water-skiing, playing touch rugby, on the slopes, or enjoying a nice cold beer.

Certifications & Accreditations