Contact us

The BioAg Agronomy and Sales team deliver advice, programs and products for better soil. Our helpful expert team can assist by arranging a soil test. Use the map on this page to find the BioAg regional manager nearest to you and call them directly for a fast, friendly response.

Members of our team are located throughout NSW, VIC, TAS and SA, and work directly with farmers and growers, as well as in conjunction with our Agent and Distribution network.


Every member of our agronomy team enters BioAg with formal qualifications in agricultural disciplines. After starting with the team they complete an intensive training period with BioAg that includes product knowledge and application, building soil fertility, and achieving cost-effectiveness and efficiencies for the customer. Our agronomists also have areas of specialisation.

BioAg Area Managers are Fertcare Level C accredited. The accreditation equips our team to design fertiliser programs tailored to your crop or pasture.

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Agronomy & sales team

Stephan Logoida

BioAg Horticulturist & Viticulturist
Area Manager – all crops

Lower Goulburn, Mid Murray & NT

0417 195 972

BScAg, PhDScAg

Stephan is our BioAg Horticulture and Viticulture specialist covering all areas, as well as our Area Manager dealing in all crops for the Lower Goulburn, Mid Murray and Northern Territory regions. Give Stephan a call to arrange an on-farm visit.

Paul Medlock

Area Manager

Northern NSW & Queensland

0429 820 360

Bachelor of Management
(Farm Business Management)

Paul has gained much experience from various positions held in the agriculture and livestock industries, in farm and area management, and specialist research in animal health for Government and private enterprise. He is currently undertaking a Master of Science in Agriculture, through the University of New England, Armidale.

Peter Emerson

Area Manager

South East NSW & North East Victoria

0438 269 939 

BAppSc/BSc (CSU)

Growing up on a family farm in the Holbrook area, Peter has worked extensively in agriculture – primarily focused on broadacre pasture and cropping systems. His knowledge and experience have included sales agronomy and advice, research, seed technology, and horticulture/viticulture. He has a keen interest in biological systems and soil health and how farmers can improve their efficiency through the correct inputs and management techniques.

Slobodan Vujovic

Area Manager

SE Victoria & Tasmania

0448 453 412


Slobodan has over 25 years’ experience in the Australian agricultural sector, working with government research organisations, agricultural industry associations and ag suppliers and providers.

He brings to the BioAg team extensive knowledge in general agronomy, soil health, pest and disease management, ag biosecurity, and irrigation. In addition, Slobodan is passionate about sustainable and resilient farming practices.

James Mwendwa

Area Manager

Riverina New South Wales

0459 474 550


With a lifetime of farming experience having grown up on the family farm in Kenya, and 10 years spent in New Zealand working in the dairy industry, James is a skilled broadacre extension agronomist and passionate agricultural researcher. He completed his PhD in 2019 at Charles Sturt University successfully gaining his Doctor of Philosophy in Agricultural Science.

James brings significant research, trial knowledge and hands-on experience in farming systems with expertise in agronomy, crop protection, herbicide resistance, soil nutrition and biological health, to help farmers drive their production profitability. He has a keen interest in biological systems, soil health and cultural weed management and how growers can improve efficiency through the correct inputs and management techniques.

Parmjit Singh Randhawa

Extension & Area Manager

Western Victoria

0461 473 808

PhD (Soil Science)

Parmjit has extensive field experience in soil management and agricultural extension, working with commercial growers on pasture, wheat, canola, and vegetable trials in both New Zealand and Australia.

Parmjit also has deep expertise in the research and development of industrial hemp, medicinal cannabis, biostimulant enhancers, and a passion for organics. He has published in peer-reviewed international journals. His in-field agronomic knowledge is supported by a Master’s Degree (Soil Fertility) and a PhD in Soil Science from New Zealand.

With his research and development skillset and in-field agronomy experience, Parmjit works with growers taking both a scientific and innovative approach to attaining healthy fertile soils and improving output quality and yield for Dairy, sheep, beef, vegetable, and arable cropping farmers.

Alexandra Lawlor

Area Manager

South Australia & Western Australia

0437 920 026

BSc (Hons)

Alexandra has an extensive background in horticulture research with CSIRO South Australia, particularly with grapevines and almond crops. Her research work interacting directly with growers and farmers specialised in plant physiology including managing salinity, drought tolerance and nutrient treatments. Alexandra has a Bachelor of Science with Honours, majoring in Plant Science.

Let’s talk

You can use our enquiry form to send us a message. You’re also most welcome to speak to one of our Area Managers about a soil fertility program for your property or paddock.

Head office

With Area Managers in locations across southern Australia, you’re never far away from BioAg advice about soil health for your farm or enterprise. Our head office is in Narrandera, New South Wales.


22-26 Twynam St, Narrandera NSW 2700

BioAg offices around the world

BioAg Solids Manufacturing Plant

240 Fyansford-Gheringhap Rd
Batesford via Geelong Victoria, Australia
Bailey McNeil
0418 135 541

New Zealand

Unit 3 / 68 Dunlop Rd, Onekawa
Napier, New Zealand
0800 224 624

United Kingdom – Thomson & Joseph Ltd

Financial House, Tilia Business Park, Tunstead Rd,
Hoveton, Norwich, NR12 8QN, United Kingdom

01603 439 511


+61 2 6958 9911