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Johnston Carmichael Appoints New Audit Director In Aberdeen



Johnston Carmichael has strengthened its audit offering in Aberdeen with the appointment of Teresa Gilligan as audit director to support the firm’s continued investment in the North East.


Teresa joins the leading UK accountancy and business advisory firm with more than 17 years’ experience in audit and assurance, gained across Big Four and other professional services firms. She has worked with a diverse range of clients spanning sectors including industrial manufacturing, logistics, retail and property, supporting listed, private equity‑backed and owner‑managed businesses.


A dual‑qualified accountant, Teresa is both a chartered and a certified public accountant. She has spent a significant part of her career working internationally and brings extensive experience delivering audit engagements under both UK and US reporting standards.


Alongside her client work, Teresa has undertaken a range of quality and technical review roles while also supporting internal training and people development by implementing strategies that foster culture and long-term talent growth.


Based in Aberdeen, Teresa will focus on developing her audit portfolio across a broad and diverse client base, with a particular emphasis on the energy sector. This is a key industry for the firm, which supports more than 800 businesses operating across the sector.


She will also support the wider team as the firm continues to grow and develop its audit services. Johnston Carmichael audits more of Scotland’s top 100 businesses than any other accountancy firm.

Teresa said:

“I’m pleased to be joining Johnston Carmichael at such an exciting time for the firm. It has a well‑established reputation for delivering high‑quality advice while maintaining a genuinely collaborative and client‑focused approach."

“Throughout my career, building strong relationships with clients has always been a key priority, and Johnston Carmichael’s relationship‑led ethos strongly resonates with me. The firm’s ambition for growth, combined with its commitment to doing the right thing for its clients and its people, really stood out."


“The energy sector is such a vital part of the North East economy, and I’m looking forward to working with clients across this space, supporting them through the challenges and opportunities presented by a changing landscape.”


David Wilson, Aberdeen Office Head & Audit Partner said:

“The energy sector is undergoing a period of profound transformation, and businesses operating within it face a uniquely complex set of financial reporting and regulatory challenges. Teresa’s expertise means our clients in the energy industry can have confidence they are receiving audit and assurance services that truly reflect the realities of their sector."

“As we mark 90 years in business in 2026, Teresa’s appointment reflects our ongoing investment in our people and our future. With almost 900 colleagues across the firm, Teresa’s values and experience align strongly with our culture, and we look forward to the contribution she will make to our audit team.”


About Johnston Carmichael  

Johnston Carmichael is proud to be a leading independent UK accountancy and business advisory firm. With over 900 sharp minds across its offices nationwide, the business delivers specialist sector insight and expertise. Together, its people create enduring impact and have been investing in the next generation of businesses and advisers for more than 85 years. Committed to Corporate Social Responsibility, the firm is gold sponsor of the Kiltwalk and a member of the Mindful Business Charter. As a member of Moore Global, it is also connected to a community of more than 30,000 people in 110 countries worldwide.  


For more information on Johnston Carmichael, please visit here.  

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  • Jun 12, 2023
  • 6 min read

Updated: Oct 27, 2023


Johnsons of Whixley have been supplying the nation with millions of quality plants and trees for over 100 years from their nurseries in Yorkshire. Paul Andrews went to visit them to find out more.


Johnsons of Whixley is a three-generation family business located in North Yorkshire, equidistant between York and Harrogate, with over 100 years experience in growing and supplying trees, shrubs, and plants to UK-wide planting schemes.


12 members of the family have an active role within the business, from senior leadership positions and administration to more hands-on roles on the shop floor. The team is made up of 130 full-time staff, which can increase by up to 50% during peak seasons.


From those in the office, on the shop floor, or on the ground tending to the plants and trees, this is a family business that puts people first. They strive to nurture and develop all their staff and are proud to say that each staff member plays an important role in the growth of the business.


Spread over five production sites covering 200 acres across North Yorkshire, they are one of the longest-established and largest wholesale commercial nursery businesses in the UK, annually growing and supplying millions of plants, shrubs and trees to the UK trade for 100 years.


As a business they supply in excess of five million plants and trees annually, which enables them to operate across three channels to market, providing plants and trees to the wholesale commercial sector for amenity and civil engineering projects, direct to garden centres, and wholesale direct via an on-site professional trade outlet supplying landscape gardeners, garden designers, tree surgeons, estates, caravan parks and Universities, with a large variety of stock all year round.


The journey for the current family owners dates back to 1964 when John Richardson had just got married, had their first child and then bought this small nursery.


But even prior to that there was a long family history in the sector, with hard work and entrepreneurial spirit at the heart of all that he did. Growing up, his mother’s family had been growers for generations with their main crops being rhubarb, vegetables and salads, and from the age of 12 he spent every spare minute helping out on the farm, being paid for the work he did. “My wage at this time (aged 15) was £3.20 for a 47 hour working week which was paid to my mother in return for all my food and clothing and I kept the money that was paid for any overtime that I did,” John explains.


“I then got a place at the local agricultural college, but was encouraged to do a two year course in Essex, which resulted in a big move down South. It was a thoroughly enjoyable time in my life as I was working hard and building up a good amount of capital too. I then moved back to the East Riding of Yorkshire with work with the Bean family in their horticultural business whilst at the same time earning extra money by doing gardening projects at weekends.”


Entrepreneurial spirit and a desire to be successful was evident from a young age. Balancing jobs with extra work in the community helped to build up savings and John was never shy of trying something new. Working for Secretts in Surrey provided more opportunity too as he was driving lorries to Covent Garden with produce from the farm and then stopping off on the way home at Buckingham Palace to collect horse manure on the return journey!


His career continued, and when he was considering his future, a role in Scotland as a commercial grower advisor arose, which he took, moved to Scotland, and it was here that he met his future wife. As a rep on the road life was busy but John loved it, clocking up about 25,000 miles a year back in the late 1950’s and he was happy.


It was whilst he was based in Scotland, away on a business trip to Aberdeen and staying in a hotel, that John received a call from his Uncle back in Whixley. A Mr Johnson, who was 67 years old had a nursery business that he wanted to sell, and his Uncle asked John if he was interested in taking it on. 17 trips between Scotland and Whixley and the deal was done, and the journey to begin the business that it is today, had begun.


For John, looking back today, he recognises the effort that has been put in to build the business and for him one of the proudest moments is the fact that it provided an opportunity for his three sons to join the business and to work together building it. “I worked with my kids and that was fantastic,” adds John, “but they had to work for the benefits and make a real contribution, which they did, and over time they took on more and more of the responsibility too,” adds John.


Graham, one of John’s sons adds that “I learnt a lot from my Dad and he led by example, as we do now, doing it the family way. There was no ‘big stick’ and there was no pressure to join the business, but it is in the blood and part of the ‘working the land mentality’ that we have as a family. We have never had a family fall-out, and every decision has always been made by consensus.”


As a family they grew up on the nursery, in the house that was previously owned by Mr Johnson. As John explains, “he built another home next door which my brother now lives in. When we took on the nursery and bought the business we took out a loan to help pay for it and at the time there was £2,000 left to pay with two years to go. Mr Johnson and his wife, both veterans of World War I, were so pleased with the way that we had taken on and run the business, feeling that it was in safe hands to such an extent that they wrote off the balance of the loan.”


The family business has grown from an 11 acre site with 11 staff and a turnover of around £30,500 to what it is today, 200 acres, multiple sites, turnover of around £17 million and a full time staff of 130 with a further 50/60 added to cope with seasonal pressures.


The business has grown under the Richardsons and there are now seven of the third generation actively involved in the business. As John explains, “My great satisfaction is that the family have become so engaged in the business and are taking it forward, something that gives me so much pleasure and pride, knowing that it is continuing into the next generation. Graham has developed the business elements of the company, whilst Andrew concentrated on sales and promotion, and Iain controlled physical expansion and production.”


As Graham adds, “It is fantastic for us to be working together, each and every day, coming together as a family, as one, and building on the legacy that has been created by our parents. It is a pleasure to be taking it forward and continuing to build something for the future with an engaged family, core values, and a great team of staff too.”


John is the first to admit that the business has changed a lot since he acquired it back in 1964. “So much has changed and yet so much remains the same. The way things are grown and the need for sustainability is high on the agenda but the passion that we have as a family to continue to invest in the business is still evident for all to see. We work together as one and continue to invest in the future of the business and I am truly proud of the business that we have created today, and delighted that it is passing safely into the hands of the next generation.”


Johnsons of Whixley continues to grow and develop new routes to market. As Graham concludes, “We are proud of the business and our family values that shape our growth. We are also proud of our low staff turnover and ability to identify, recruit and develop staff members who go on to give 20, 30 or even more than 40 years’ service, and endeavour to recognise and reward long service.”


This is a great family business, a great ambassador for Yorkshire and a business that is proud of its’ heritage, the plans for the future, and one that continues to successfully build on the entrepreneurial spirit of the generations that have gone before.


We look forward to seeing their continued growth and development in the years to come.

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