Our People

SealesWinslow has a team of experts covering the entire country.

0800 287 325

Animal Nutrition TSR - Eastern Bay of Plenty, Rotorua, Taupo
Mark Mellsop

Sales Team

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. 

SealesWinslow Sci Extn NI Contractor
Paul Sharp

Nutrition Team

Paul has an extensive background in agricultural production systems consultancy and an in-depth experience in strategic development and practical implementation of dairy and ruminant farming systems.  He has provided consultancy services both in New Zealand and internationally for Dairy Beef Solutionz Ltd, Nutrition Services Ltd, Ravensdown Co-operative, AgResearch Limited and Intelact Nutrition Limited, among others.

Paul has a Bachelor of Agricultural Science with Honours, majoring in plant science and intensive dairy systems, and is a member of New Zealand Grasslands Association, New Zealand Society of Animal Production, New Zealand Association of Scientists and New Zealand Association of Ruminant Nutritionists.

With strong expertise in dairy, beef, goat and sheep nutrition, Paul provides technical extension and training to the SealesWinslow team.

Regional Sales Manager Northern
Ryan Scholes

Sales Team

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.

Regional Manager Central
Darryn McDonnell

Operations Team

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.

Animal Nutrition TSR - South Waikato
Sue Avison

Sales Team

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.

National Operations Manager
Tyler Stuthridge

Senior Leadership Team

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.

Regional Manager Northern
SealesWinslow team - SLT Williams
Mark Williams

Operations Team

Mark comes from a sales and logistics background managing up to 70 staff in a manufacturing plant.

Mark was looking for employment close to home, after him and his wife moved to Morrinsville three years ago.  Mark decided that as the parent company of SealesWinslow is Ballance Agri-nutrients, known to be a great place to work, joined the SealesWinslow team as Morrinsville site manager.

Within his first year with SealesWinslow, Mark has been promoted to Regional Manager Northern. He is working towards identifying and developing talent within SealesWinslow.  He loves to see people grow and is thoroughly enjoying getting to know and to work with the Morrinsville and wider SealesWinslow teams.

Mark and Maureen have two sons and four grandchildren living in the Waikato area, so not too far to go and visit in their 1938 Chevy Flatback.

Animal Nutrition TSR - Franklin, North West Waikato
Simon Butler

Sales Team

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.

Animal Nutrition TSR - Coromandel, Hauraki Plains, Te Aroha & Matamata-Piako
Hayden Hulley

Sales Team

Hayden grew up on a dairy farm in the Hauraki Plains and has been in the dairy industry for almost a decade. His experience ranges from working at RD1/Farm Source to working at Anexa Veterinary Services. Hayden is passionate about helping his clients achieve their on farm goals.  Outside of work you will find Hayden fishing or on his dirtbike.

National Sales Manager
Richard McKean

Senior Leadership Team

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. 


General Manager
Grant Jackson

Senior Leadership Team

Grant has a strong track record in the agri-sector with over 25 years in leadership roles with Miraka, LIC, BNZ and Summit Quinphos. Grant qualified with a Bachelor of Science (Biochemistry) from Lincoln University, and has undertaken post graduate studies across leadership and governance, including being a Kellogg Rural Leadership Scholar. Grant and his family reside in Taupo, where he is also a trustee on the local Economic Development Agency.

Regional Sales Manager - South Island
Renee Fa'atui

Sales Team

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.

Regional Manager Southern
Steve Carr

Operations Team

Steve started with Seales Winslow September 2021.

Steve has an accounting background and is a qualified Chartered Accountant. 

Prior to Seales Winslow Steve was the Plant Manager of a large French fry factory employing over 350 staff.

Born and bred in Mid Canterbury, Steve is passionate about supporting farmers who are the driving force of the local economy.

Procurement Category Manager
Michael Leaf

Michael has over 20 years procurement experience, with his career spanning across the retail, education, electricity, and agriculture sectors. Michael qualified with a Bachelor of Business and has recently received his MCIPS procurement qualification from the Chartered Institute of Purchasing and Supply.

Michael works for Ballance and Seales Winslow, with his role spreading across all spend areas. He has a significant focus on raw materials, packaging, and freight. Michael prides himself on developing strong relationships and creating ongoing value for the business.

Outside work, Michael enjoys spending time with his family and getting outdoors, usually on a bike or surfboard.

Animal Nutrition TSR - South of the Rakaia River to Balclutha
Kenton Sinclair-Donnelly

Sales Team

Kenton dairy farmed for 14 years, 10 years in Methven, Mid Canterbury and four years on the West Coast of the South Island, managing farms for 12 of the 14 years. Prior to dairy farming he was an aircraft engineer for 28 years specialising in chemical engineering, 20 years for the Royal NZ Air Force and eight years with Air NZ. Whilst dairy farming he realised the importance of nutrition, working closely with Nutrition Specialists to optimise production and upskilling by completing nutrition courses. He brings his passion nutrition to this role to provide results focused assistance to his clients to achieve their goals and optimise their business success. Outside of work he spends time with his family and maintaining his fitness.

Animal Nutrition TSR - West Coast, Nelson & Tasman
Charlotte van der Hulst

Sales Team

Technical and Quality Manager
Paul Drew

Nutrition Team

Paul is the Technical (Nutrition) and Quality manager for SealesWinslow with over 20 years experience as a multi species animal nutritionist. He holds a M.Sc. specialising in animal nutrition and has held various roles in sales, quality and nutrition for various companies. Paul believes that by being open minded and understanding how the complexities of nutrition can be used to achieve an operations objectives, the optimal welfare, health and profitable solution can be derived.

Animal Nutrition TSR -Taranaki
Craig Robinson

Sales Team

Craig has lived in the Taranaki region for a vast majority of his adult life after growing up on his Manawatu family farm. He has a strong background in Rural Finance, Animal Health and combined with his farm systems knowledge, knows how to add value through nutrition to any farming operation. Craig currently lives in New Plymouth and has two teenage sons.