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Who We Are

Sentek designs, develops, manufactures, supports and globally distributes world-class technologies for measuring and managing soil moisture, salinity and temperature.

Use Sentek technologies to monitor groundwater movement, generate exceptional research data and gain vital insights into crop water use to make better irrigation decisions.


Keeping it local

Sentek products are sold and supported by a global network of highly trained dealers who are the local experts you can contact for advice on site selection, installation, setup, ongoing product care and data analysis.

We have representatives based in United States, Canada, Australia, New Zealand, Europe, Africa, Asia and the Middle East who can help you choose the right Sentek technologies to measure and manage soil moisture, salinity and temperature.

Our management team

It takes a highly qualified and experienced team to bring world-class soil and salinity monitoring solutions to market. Our Sentek leadership team is responsible for driving product innovation and promoting sustainable company growth.

Our leaders ensure we remain a global leader in soil moisture content technologies. Meet the team responsible for ensuring Sentek stays focused on developing the best soil moisture probe and advanced software to help you: our Sentek customers.

Michael Portmann

Manager, Engineering

Michael joined Sentek in January 2005 as a Design Engineer developing and overseeing firmware and hardware aspects of large set of Sentek’s product range including the sensor technology itself. Michael had also worked with Sentek as a contracted engineer since 1999. He has a Bachelor of Engineering in Computer Systems Engineering with Honours from the University of South Australia and was previously employed as a Design Engineer for a local contract design and manufacturing company where he developed products covering a wide range of industries from fitness equipment, industrial laser control and aeronautical instrumentation.

Peter Buss

Manager, Agronomic R&D

A co-founder of Sentek and an ‘inventor’ of Sentek’s intellectual property, Peter possesses a Degree of Engineering in International Agronomy, a Masters of Arts from the Free University of West Berlin and a Masters of Science in Rural Science from the University of New England, NSW.

Peter is an international authority on agriculture and irrigation systems, with many published papers, and is responsible for the agronomic and soil science activities in Sentek. He is involved in the conceptual development of product, product testing and responsible for distributor training, industry education and international liaison with research organisations and overall agronomic support.

Peter has worked as an agronomist and supervisor/manager in the private and public sectors. For some years, he was Chairman of the Sentek Board.

Nick Ktoris

Chief Executive Officer

Nick joined Sentek in February 2000, with responsibility for all financial and administration matters, including human resources. In February 2007, he was appointed as Chief Operating Officer, reporting to the Board on all operational aspects of the business.

His sound business acumen and skills, as well as his substantial experience within Sentek, led to his appointment as CEO in March 2010, when he took on overall responsibility for overseeing the management and direction of the company.

Prior to joining Sentek, Nick worked as a Finance and Administration Manager in the areas of transport and manufacturing. Nick has a Bachelor of Commerce (Accounting) from the University of South Australia, and is a Fellow of Certified Practising Accountants Australia (FCPA) and a Member of the Australian Institute of Company Directors (MAICD).

Rob Guy

Manager, Sales and Marketing

Rob has worked for more than 20 years in forestry, irrigation and natural resources research, training, consulting and operations. He holds a Bachelor of Science (Hons) in Hydrology and Soil Science, a Bachelor of Commerce and teaching qualifications. He has worked with Sentek for over 11 years in the research, agronomic training and sales departments.

Mary Perrotta

Manager, Finance and Administration

Mary joined Sentek as the Company Accountant in 2000 and was appointed Finance and Administration Manager in 2008. Mary holds a tertiary qualification in accounting.

John Luca

Manager, Production & Logistics

Prior to joining Sentek in 2012, John was involved in the electronic manufacturing industry for over 12 years, specialising in production engineering and production management. John strengthened this expertise with two years of international experience, during which time he set up and managed an electronic assembly facility overseas.

World-class quality

We stand by the products we produce and we invite independent third parties to test our technologies, business model and inventions. These regular reviews ensure we make the best soil moisture measuring and monitoring products possible. Business, industry associations and government have all independently endorsed our products. We have also achieved the International Organization for Standardization (ISO) 9001 certification that proves our quality management system is world-class, our products comply with consumer and regulatory standards and Sentek is a brand you can trust.

Become a Dealer

Have you considered joining our global network of specialised Sentek dealers? The three key strengths you need for success are: soils knowledge, sales and marketing skills and technical capability. Learn how you can connect farmers, researchers and engineers to Sentek soil moisture monitoring technologies and how we help you develop the skills to distribute our products and offer quality advice.


Sentek careers

Would you like to join an award winning global company where ideas and innovation are encouraged? Sentek manufactures smart soil moisture technologies to help consumers make better irrigation decisions. We have teams based in Australia, Europe and the United States and offer specialist career opportunites in production, sales, software development, accounts, warehousing, technical support, marketing and customer service.