Our Story

From humble beginnings to a team of professionals

Michael Castor & Associates Pty Ltd (MCA) was established in Goondiwindi in 1988 by Michael Castor to provide independent on-farm agronomic advice to dryland and irrigated broadacre farmers. Originally a one-man agronomy operation, the business has expanded significantly to become one of the larger private Agricultural consultancy businesses in Australia. Now in its 37th year of successful operation, MCA Ag Group offers multiple agricultural services including Farm Management and Investment, Agronomy Consulting, Precision Ag and, more recently, its own Agricultural Research division. 


The company now boasts seven shareholders and directors, with Michael Castor remaining the principal shareholder. All shareholders are senior full-time employees of the company. MCA Ag Group employs 21 full-time and 2 part-time qualified consulting agronomists to provide agronomic services tailored to the specific needs of each client. In addition to the agronomic staff, MCA Ag Group also employs a highly experienced corporate farm manager, research agronomist, and precision agriculture specialists, ensuring superior whole-farm management.

Our Service Area

MCA Ag Group operates across a broad and diverse region spanning Southern Queensland and Northern New South Wales. Our current service area extends from Taroom to Surat in the north, Muckadilla to Dirranbandi in the west, Yetman to Crooble in the east, and extends south through Moree, Bellata and Boggabri. Our experience also includes previous project work as far south as Griffith, NSW.


We continue to strengthen our regional presence, with additional offices now established in Toowoomba and Chinchilla to better support our services.

What Sets MCA Ag Group Apart?


MCA Ag Group is an experienced private consultancy company dedicated to achieving agricultural production success, uniquely tailored to meet the specific needs and goals of each client. Our integrated business model synergises multiple facets of agriculture, enabling comprehensive whole-system management.


Comprehensive Service Offering

MCA Ag Group provides a diverse range of services, including farm investment, farm management (including machinery, staff and administration), agronomy, precision agriculture, and agricultural research. This comprehensive approach allows us to provide sophisticated and targeted solutions to our clients, ensuring the optimisation of their agricultural operations.

Spanning over 400,000 hectares, MCA Ag Group currently provides whole-farm agronomic consulting services to approximately 110 dryland broadacre clients and 20 irrigated clients. In addition, MCA facilitates the management of multiple large-scale irrigated and dryland corporate farms, offering a full suite of services that include agronomy, farm planning, administration, staffing, and machinery management.

Scale and Reach

Regional Expertise

Our extensive coverage across diverse farming regions and enterprises in Northern New South Wales and Southern Queensland provides us with extensive agronomic insights, significantly benefiting our clients.

The inclusion of seven senior consultants within the ownership structure of the organisation has significantly enhanced the management and mentorship of junior staff, enabling the efficient servicing of a large client base. Each of the seven senior Directors/Consultants is responsible for their own group of clients, supported by a team consisting of a senior partner, an experienced associate, and a trainee. The senior consultant maintains overall responsibility for the services provided to the clients within their group.

Experienced Leadership and Staff

Consistent, High-Quality Advice

Our business structure ensures that all clients receive consistent and experienced advice while promoting role differentiation and the professional development of junior staff. Additionally, regular MCA staff agronomy meetings are conducted to consolidate agronomic policies, ensuring that all clients receive a uniformly high standard of advice which reflects the most up to date research.

Leadership Team

Get in touch

At MCA Ag, we are committed to providing our clients with high-quality agricultural services that are tailored to their specific needs. Our expertise, combined with our extensive service area and long-standing history, make us a trusted partner for farmers throughout southern Queensland and northern New South Wales.

Contact us