Our People
SealesWinslow has a team of experts covering the entire country.
Roger Dettling
Nutrition Sales Specialist - Southern Taranaki, Coastal Taranaki
SealesWinslow
Dairy Farming Nutritional Advice
Nutrition Sales Specialist - Southern Taranaki, Coastal Taranaki
Abby Henderson
Nutrition Sales Specialist – Southland, Invercargill, Winton
Steve Maxwell
Nutrition Sales Specialist – Southland
steve.maxwell@sealeswinslow.co.nz
With more than 12 years in the primary sector, Steve brings a broad, hands-on background across farming, contracting and rural advisory roles. He has worked in the dairy industry, spent nine years as an agricultural contractor, and later held a Nutrient Specialist role with Balance Agri-Nutrients. Steve also holds a Bachelor of Science in Zoology, giving him a solid science-based foundation to support practical, on-farm decision making.
Steve has a strong background in pasture-based systems and takes a practical, whole-farm approach to nutrition. He enjoys working closely with farmers to build trusted relationships, identify limiting factors in production, and integrate supplementary nutrition in a way that supports pasture performance and drives productivity. By combining on-farm experience with the wider SealesWinslow Nutrition team, Steve helps farmers optimise efficiency and profitability.
Outside of work, Steve keeps busy with his two kids, two dogs and two cats. He enjoys old cars, playing guitar and keeping fit.
Julie Fox
Nutrition Sales Specialist – Northland
With 25 years of experience in the primary sector, my nutrition expertise centers primarily on Calf and custom Blends, complemented by a dual role with NRM. Prior to SealesWinslow, I worked with Ballance Agri Nutrients and RD1/Farmsource. My greatest satisfaction comes from partnering with farmers, gaining insight into their business, and collaborating on effective solutions.
I’m motivated by seeing results, such as helping a dairy farmer transition to a custom blend and achieving a great response with an increase in Milk Solids within a week. I love dealing with people and the variety my role offers.
Outside of work, I stay involved in my community. I play netball in winter and provide first aid and strapping for the local rugby club. I’m also involved with the Northland Field Days committee. I prioritize time with family and love going fishing with my Dad during the summer months.
Chris Stephens
Regional Sales Manager
chris.stephens@sealeswinslow.co.nz
My connection to the primary sector began in 1998 with dairy farming, foundational experience I built upon with an OE and further time on the farm. Academically, I hold a Diploma in Agriculture and a Diploma in Agribusiness. Professionally, I started with Farmlands in 2008, moving to NRM in 2010 as a Technical Dairy Rep, and now serve as the SW Team Lead/Farmlands Commodity Manager.
My core expertise is in Dairy and Calf Nutrition/Commodities. What I enjoy most is being brought into a farmer’s business to help solve a problem and develop a lasting solution-focused relationship. My main motivation at SealesWinslow is the people—working alongside a passionate team who share my drive for providing top-tier nutrition solutions.
Outside of work, I enjoy spending time with my wife and three teenage boys. I like playing golf and, whenever possible, fishing on Lake Taupo or any river near Turangi.
Roger Dettling
Nutrition Sales Specialist – Southern Taranaki, Coastal Taranaki
roger.dettling@sealeswinslow.co.nz
Roger grew up on a dairy farm and spent nearly a decade farming before moving into nutrition. For the past 10 years he has worked as a Nutrition Specialist, combining his farming background with technical expertise to support farmers across the dairy, sheep and lamb sectors.
His main area of expertise is balancing dairy cow diets to get the best return on investment, but he also works closely with farmers on sheep and lamb nutrition. Roger has helped farmers lift performance significantly – one farm increased per-cow production by more than 50% over four years, while another lifted peak production by 15% and sustained it longer by maintaining energy through a balanced diet. His approach is always about feeding what stock need for the best response, not just the cheapest option.
Outside of work, Roger and his family are heavily involved in sport. He has a background in speedway racing and now supports his two children in Youth Ministocks, as well as taking part in smallbore shooting and indoor soccer. With the kids also playing soccer and rugby, there’s always something on to keep the family busy.
Paul Cooper
Nutrition Sales Specialist – North Canterbury, Marlborough
paul.cooper@sealeswinslow.co.nz
With 40 years in the primary sector, Paul brings deep practical knowledge of farming and rural life to his role with SealesWinslow. He has spent the past three years focused on animal nutrition, completing his DPS course and supporting farmers with a wide range of feeding solutions.
Paul is known for being hands-on and approachable. He doesn’t claim to be a specialist in just one area – instead, he brings broad knowledge across products and a focus on finding answers quickly. He has worked with farming families across generations, helping them lift production and stay on track with their goals.
Outside of work, Paul enjoys fishing, boating and building projects, as well as spending time outdoors.
David Fairhall
Nutrition Sales Specialist – South-Mid Canterbury, North Otago
david.fairhall@sealeswinslow.co.nz
With nearly three decades in the primary sector, David brings a wealth of experience to the SealesWinslow team. For the past 14 years he has specialised in animal nutrition, working across the dairy, calf, deer and sheep sectors.
David is considered an expert in all aspects of ruminant and young stock feeding. He enjoys working as part of a strong, experienced team that can bring together the right solutions for farmers on farm. His focus is on practical, effective nutrition that helps stock perform and supports long-term farm success.
Having grown up on a farm and now running a small farm himself, David understands firsthand the challenges and rewards of farming life. That perspective helps him connect with farmers and offer advice that’s both grounded and realistic.
Chrissy Alexander
Nutrition Sales Specialist – Southern Waikato, Central Plateau
christan.alexander@sealeswinslow.co.nz
With 16 years in the primary sector, Chrissy has developed wide experience across animal nutrition and farm systems, including time with key rural suppliers and dairy nutrition solutions providers like Nutrinza, before joining Seales Winslow.
As part of the SealesWinslow Nutrition team, Chrissy works alongside farmers on stockfeed blends, mineral requirements, seasonal planning and young stock nutrition. She is particularly experienced in bypass fats and minerals, and has helped many farmers lift milk solids, litres and body condition over time. For Chrissy, the most rewarding part of her role is building strong relationships and supporting farmers to see long-term improvements in herd health and productivity.
Outside of work, Chrissy enjoys travelling, horse riding, practicing Tao Do martial arts and spending time with her family.
Brad Aitken
Nutrition Sales Specialist – Southland
brad.aitken@sealeswinslow.co.nz
With almost 20 years in the agricultural sector, Brad has built up wide experience across nutrition, minerals and stock feed. Over the past 12 years, he has specialised in ruminant and calf nutrition, working with trace elements, minerals, and young stock feeds before moving into dairy nutrition. He has held nutrition roles with key rural suppliers and feed companies, and now works with SealesWinslow, where his focus is on helping farmers optimise herd and young stock performance.
Brad is known for his practical approach – quickly diagnosing issues on-farm and developing tailored feeding plans that lift production, improve reproduction and strengthen animal health. His strongest focus is dairy nutrition, but he also brings deep experience in calf rearing to help farmers set up their young stock for the future.
Outside of work, Brad enjoys following his kids’ sports, working on the family’s small farm, catching up with friends, and getting along to a good concert.
Scott Saunders
National Operations Manager
With 30 years of experience spanning Agriculture, Mining, and Manufacturing, my primary expertise lies in manufacturing high-quality Compound Feeds and Complex Blends for a wide range of livestock, including Dairy, Poultry, Beef, and Sheep. My academic foundation includes a BAppSc in Rural Management from the University of Queensland. Before SealesWinslow, I worked as an Agronomist with IAMA Australia.
I’m motivated by the chance to work with great people and deliver high-quality animal nutrition solutions to our customers. I truly enjoy seeing hard work rewarded for farmers, and I view every returning and new customer as a success story for our Manufacturing Team.
Outside of work, I love spending time with family and friends.
Ange Redman
Nutrition Sales Specialist – Piako, Coromandel
With over 17 years of experience in the rural industry, I began my career at Fonterra Head Office before transitioning to a rewarding 13-year tenure as a Technical Specialist at Skellerup Industries Ltd. My expertise and passion lies in the dairy sector, where I get great satisfaction from assisting customers in finding effective solutions.
Outside of work, my husband and I reside on a small lifestyle block nestled in the heart of the Kairangi community near Cambridge, where we enjoy rearing calves. Traveling is a passion of ours, with one of our most memorable journeys being through East Africa.
In my leisure time, I indulge in my other passion, horse riding, exploring the picturesque Kairangi countryside or embarking on treks in the King Country.
Shannon Reith
Customer Services
0800 287 325
Shannon is also based in our Ashburton branch, with two years as a customer services team member under her belt. Shannon has shown a real commitment to growth in her role. With incredible problem-solving skills and the ability to see the bigger picture Shannon is dedicated to the end-to-end process for our customers. A rep netballer and self-professed ‘gym junkie’, down time for Shannon looks like getting into a good series or movie on Netflix.
Corporate Key Account Specialist
Grant is originally a South Island lad who obtained a Bachelor of Science in Agriculture & Forestry from Lincoln University. He then went on to spend the next 15 years of his working career supporting farmers in Canterbury and Top of the South via Ravensdown, Fonterra, FMG and ANZ, working with small mum and dad operations through to corporates.
For the past 5 years he has delved into wine, forestry and pest control leaving Vector Free Marlborough to return to his passion of working with farmers.
Grant now lives in Taupo with his wife (originally a Waikato girl so wanted to return home) and his other passions are his dog and his mountain bike.
Mike Harrison
Animal Nutrition TSR – North of the Rakaia River to Marlborough
Animal Nutrition TSR – North Canterbury
Peta Hamilton
Nutrition Sales Specialist – Lower North Island
I was born and bred in Whanganui and grew up on a sheep and beef farm. I have had a passion for farming from a young age. After meeting my husband, Andy, and following him around New Zealand as he chased the high-country sheep and beef farming dream in the South Island, I decided to throw myself into relief milking, calf rearing, and working for LIC, where I found dairy farming really interesting – especially raising quality calves and young stock. I started my journey within the rural retail sector with PGG Wrightson in Lumsden before continuing in the Whanganui PGG Wrightson store after moving back home in 2021.
I have three daughters, Quinn, Honor, and Geva, whom I really enjoy spending time with, whether it be driving around the countryside to different horse events, heading to WOW in Wellington, or spending time at the beach. I am an avid sports fan, especially of Netball and Rugby. I help coach a local school netball team and spend most winters on the sideline watching my daughters play.
I am looking forward to getting out and about on the farm and getting to know farmers within my region.
Lauren Otto
Merchant Technical Sales Representative – North Island
Tyler Stuthridge
Head of Sourcing, Toll & New Product Development
Tyler was born and bred in Ashburton and having completed his training at local business RX Plastics, Tyler is a qualified engineer.
Tyler joined SealesWinslow (Ashburton site) in May 2013 as an engineer and quickly emerged as a natural leader. Tyler became the site Operations Manager in December 2016 and was promoted to Regional Manager in July 2017.
Tyler is passionate about running a quality driven site. When he’s not working, Tyler enjoys motor cross and trail bike riding.
Nutrition Sales Specialist – Western Waikato, King Country
Sue joined the SealesWinlow team based in Morrinsville as a customer service assistant in 2007.
Having previously worked for 17 years in the service department at Maber Motors (part of Power Farming) assisting farmers with service and repairs, Sue brings an abundance of understanding of what is important to farmers.
As a local to Morrinsville for the last 25 years, Sue knows the people and area intimately, a huge advantage in her current role as Technical Sales Representative for the South Waikato area.
Sue loves all animals, so enjoys getting to know her customers and working with them to ensure they have the best possible solutions for their herds health and performance.
Regional Manager Southern
Nutrition Extension Specialist
Simon has been with Seales Winslow since March 2022. After completing a Bachelor of Science at Massey University he worked on dairy farms for the last 4 and a half years in Palmerston North and Taupo.
His passion is to apply his in depth understanding of animal physiology and production to help produce healthy happy and profitable dairy cows.
In his personal time he is a keen hunter and trout fisherman, mountainbiker and snowboarder.
Ryan Scholes
National Sales Manager
Before joining SealesWinslow in 2010, Ryan was with Anexa Animal Health. Having worked closely with dairy farmers for almost a decade, Ryan has a good grasp of what it takes to be successful in the dairy industry.
Ryan is passionate about helping local farmers improve the health and performance of their herds in the Matamata, South Waikato and Waihi areas.
National Sales Manager
Richard started with Seales Winslow in June 2022 following nearly 4 years running the Sales Capability team at Ballance.
With a Bachelor of Mechanical Engineering from the University of Edinburgh and 13 years at ANZ, including 5 years in Commercial and Agri-banking Richard is passionate about customer experience and a winning team mentality driving valuable outcomes for our customers. He enjoys seeing our sales team succeed and helping their customers grow.
Renee Fa’atui
Regional Sales Manager – South Island
Renee Fa’atui is the South Island Regional Sales Manager and Corporate/Key Account Manager for SealesWinslow and has been with the team since August 2022. Originally from Wellington, Renee spent her earlier career in admin & event management and only entered the agriculture industry in 2014 when she worked for MyMilk (part of Fonterra) for over 4 years and then moved to Synlait Milk for 3 ½ years as an Area Manager and looking after milk procurement. Renee is passionate about giving back to the industry and has been involved with Dairy Women’s Network and Rural Support Trust. Outside of work, Renee enjoys her time with her amazing husband and two beautiful daughters and socialising with friends and family. She also has a passion for the watching sports, especially her beloved Hurricanes, All Blacks and is a true Holden supporter with the V8 Supercars.
Nutrition Sales Specialist – Bay of Plenty
Chances are you might already know Mark, who joined SealesWinslow at the beginning of 2012. Before that he was with RD1 for over 20 years, including a long stretch as branch manager of the Reporoa and Te Puke stores.
Mark is SealesWinslow Technical Sales Representative for Tauranga, Whakatane, Rotorua and surrounding areas within the Bay of Plenty.
Having supported farmers all his working life, Mark has a great understanding of the dairy industry and the challenges and opportunities that go with it. His knowledge of local conditions is unbeatable and he’s a great person to turn to for advice on increasing the health and performance of your herd.
Nutrition Sales Specialist – Mid Canterbury
Darryn has a wide range of experience in production and operations roles from a 16 year period at George Weston Foods and Weston Animal Nutrition.
He joined SealesWinslow (Ashburton site) in late 2012 as the Operations Manager and in August 2016, relocated to the North Island as Regional Manager for our central region.
Darryn’s an avid communicator who’s passionate about building a team with a strong customer focus. Darryn and his family live on a small lifestyle block near Whanganui.
Taranaki Technical Sales Representative
Nutrition Sales Specialist – West Coast, Tasman
When British-born Charlotte van der Hulst decided to step away from contract milking she wanted a role where she could still have day-to-day contact with the dairy industry she loves.
She has found her perfect role at SealesWinslow as the West Coast, Nelson and Tasman Technical Sales Representative. She has traded in 5am starts in the cow shed for weekly visits to dairy farmers across the region, using her hands on experience to help them uncover how good nutrition can boost farm production and profitability.
Cam Neeld
Nutrition Sales Specialist – Franklin, North West Waikato
With 20 years in the primary sector, Cam has built strong expertise in animal health and nutrition through specialist roles with key rural suppliers. His focus has always been on guiding farmers towards better outcomes through smarter nutrition and on-farm advice.
Cam’s background in cow behaviour, metabolics, mating and facial eczema means he brings practical knowledge that helps farmers improve herd health and productivity. He enjoys working alongside farmers to understand challenges and provide solutions that make a measurable difference. Now with SealesWinslow, Cam continues to support farmers with practical, results-driven nutrition advice.
Away from work, Cam can usually be found on or in the water, or at the racetrack with his car.
