Executive Team

Executive Team

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John Prineas

Chief Executive Officer

MBA


 
John Prineas is the Chief Executive Officer of A S Harrison & Co, bringing more than 20 years of executive leadership experience across specialty chemicals manufacturing and distribution businesses throughout Australia, Asia, and the United States.

John has built a reputation for driving transformational growth, business turnarounds, and high-performance team cultures. Throughout his career, he has led complex commercial and operational businesses across a broad range of industries including coatings, ingredients, plastics, crop protection, animal nutrition, water treatment, energy, and industrial chemicals.

A passionate advocate of people development, John believes that sustainable success comes from building capable, collaborative teams and fostering strong relationships with customers, suppliers, and industry partners.

“When exceptional people are aligned behind a clear vision, there is no limit to what they can achieve. Our role as leaders is to create the opportunity, inspiration, and environment for that success to happen.”  – John Prineas

Professional headshot of Robin Vandekreeke, Group CFO at A S Harrison & Co with global finance and supply chain expertise.

Robin Vandekreeke

Group Chief Financial Officer

BA, MBA, CPA


 
As Group CFO, Robin leads our Finance and Accounting functions.  He has 29 years of experience in finance and supply chain roles across FMCG, Agribusiness, Pharma, Construction, eCommerce and Manufacturing in private and public companies across 3 continents.

Robin has a Bachelors degree in International Commerce from Brown University in Rhode Island, USA and an MBA in International Business from the American Graduate School of International Business in Arizona, USA. He is also a CPA.

In his spare time, Robin is a surf-mad, active husband and father, passionate about supporting his local community in the Northern Beaches of Sydney.

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Philip Fleming

General Manager, Strategic Business

BSc Industrial Chem, MBA, FRACI, CChem, GAICD


 
With over 40 years’ experience, Phil has worked across all areas of the business since 1995. His expertise includes R&D, product management, logistics and technical sales. Phil holds a BSc in Industrial Chemistry, an MBA, is a chartered chemist, a Fellow of the Royal Australian Chemical Institute, and a Graduate from the Australian Institute of Company Directors.  His role covers several areas of the business including our strategic relationships with channel partners.

Phil enjoys crossword puzzles and various outdoor activities. He believes that success in business comes from doing what you enjoy and doing it well. 

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Nick Sieveking

Chief Operating Officer
 

BEng in Chemistry
 


 
Nick manages the Strategic Business Centre that includes planning, customer service, purchasing, logistics, quality and compliance, project management and laboratory functions.  He has gained over 25 years’ experience in supply chain and operations across various disciplines like FMCG, Personal Products, Pharmaceuticals, Industrial and Specialty Chemicals. Nick graduated from Sydney University with BEng Chem.

In his spare time Nick enjoys spending time with family and occasionally sampling craft beer which he also attempts to brew at home!  Nick’s favourite quote is “The only constant in life is change”.

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Thomas Haskell

General Manager, Performance Chemicals

BE Chemical Engineering, MBA


 
Thomas oversees the sales and distribution of the Performance Chemicals portfolio across Australia, New Zealand, and Asia. 

He has over 10 years of experience in commercial and operational roles across lubricants, fuels, mining, and manufacturing. Thomas has a Bachelor’s degree in Chemical and Biomolecular Engineering from the University of Sydney and an MBA from Macquarie University. He is also an active Board Member of the Australian Lubricants Association.

In his spare time, Thomas enjoys bushwalking, mountain biking, and spending time in his garden growing fresh produce to use in his cooking. He believes there is always something to learn from everyone you meet and that often the best solution to a problem is in someone else’s mind.

Mike Thompson

General Manager, Food & Nutrition

 


 
With over two decades of experience in the food industry, Mike has established himself as a leader in food and nutrition innovation. 

Now heading up the Food & Nutrition division at A S Harrison, Mike is passionate about the sports nutrition sector, bringing functional, high-quality ingredients to market. His career has been driven by a commitment to product development, from exploring next-generation proteins and fibres for weight management to onboarding global manufacturing partners and introducing them to new markets across ANZ. 

Whether driving commercial strategy or developing cutting-edge concepts, Mike is dedicated to advancing the food and nutrition industry while empowering his team.

Yash Singh

General Manager, Personal & Home Care


 
Yash is an experienced commercial leader in the specialty ingredients and chemicals industry, currently serving as General Manager – Personal & Home Care.

With a strong background in business development, strategic growth, supplier management, and customer engagement, he is passionate about bringing innovative ingredient solutions to market and building high-performing partnerships across the value chain.

Outside of work, Yash is an avid Formula 1 fan and motorbike enthusiast.

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Robert Devitt

Group Business Technology Manager


 
Rob manages Group Business Technology, including ICT, Projects and Processes. He has close to 20 years of experience supporting the technical needs of businesses across FMCG, Pharma and Manufacturing. Rob graduated from Technological University Dublin with a BSc in Information Technology and achieved his PMP certification in 2011.

In his spare time, Rob enjoys spending time with his family and playing and watching soccer. His favourite quote is, “The most dangerous phrase in business is, ‘We’ve always done it this way.'”

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Robert Feltrin

General Manager, Organisational Development

BCom, MAHRI, LDP


 
Rob has been with the company for over 5 years and has extensive Human Resource experience across a range of sectors. Rob holds a BCom, MAHRI, LDP from Sydney University and was a finalist in the 2020 & 2021 HR Manager of the Year for Australia and awarded “Australian Employer of Choice” 2020 & 2021.  

In his spare time, Rob likes to spend time with his family, and explore the great outdoors of Australia. Robs favourite quote is “Every problem is a gift—without problems we would not grow.”


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