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Why join us?

At STK you have the opportunity to be part of a culture where we value collaboration and individual initiative. It’s a company where creativity and responsibility are encouraged. Our team members have the potential to gain international exposure working alongside colleagues from over 30 countries worldwide. Join us in our efforts to deliver better food products to market.

Development Manager – Central America - Guatemala and Costa Rica

We are looking for a strategic Regional Development Manager to join our team in Central America. Responsible for leading the product development of our botanical based solutions (BBS) portfolio in the region, working with colleagues from STK commercial department, third party research suppliers as well as distributors and end users.
In this role, you will collaborate closely with and support the STK Central America commercial team to build technical understanding of our portfolio. Reporting directly to the Regional Manager, and indirectly to STK Headquarters Development department, you will promote our portfolio of BBS to clients, (farmers, growers, end-users) in close liaison with our local distributors. You will maintain and develop profitable customer relationships while helping STK achieve its sales objectives within the defined sales geography.

Please send CV to:

Duties and Responsibilities:

  • Technical developing and implementing of existing and new Botanical Based Solution in the region.
  • Manage sample product within established guidelines and policies.
  • Function as the technical face of STK to our distributors and their growers, as well as many other market influencers and industry partners
  • Work closely with regulatory manager
  • Assist Regional Manager with technical, market and competition analysis as requested.
  • Follow and promote all company policies and product requirements for safety and regulation.
  • Manage and maintain travel expenses within established budget(s) and per established company expense policies.


  • Strong technical knowledge in fungicides, including competitive products and their positioning. Botanical/biological products experience will be considered as a plus.
  • Expert knowledge of product development processes, and familiar with marketing and sales processes.
  • knowledge about how to build field trial protocol for development and for registration.
  • Practical understanding of the agricultural market place of Central America.
  • Experience on product(s) or project management.
  • Experience working with sales and marketing organizations.
  • Product Technical Management and Product Development experience in developing products in the agricultural sector.
  • Strong understanding of agriculture practices in Central America relating to crops like bananas, rice, coffee, vegetables, cacao, peanuts, pineapple, and tobacco.
  • Proven ability to influence product recommendations at both the grower and retail distribution levels.
  • Strong communication and time management skills
  • Ability to work independently.
  • Experience managing time and expenses
  • Availability and willingness to travel abroad as needed – at least 40% of the time
  • Must have a valid driver’s license, and valid passport.
  • Resident in Costa Rica or Guatemala.

Required Education and Experience:

  • Preferably BA/BS or MSc in Agriculture, Agribusiness, or Ag Science related field. Experience in development sales of agrochemicals or crop protection chemicals preferred.
  • At least 5 years’ experience in crop protection industry and Central America Agricultural market.

Work Environment:

  • This job operates in both business settings and a production agricultural environment. Office and administrative duties for this position will be required at least once a week.

Position Type/Schedule:

  • This is a full-time exempt position Monday through Friday. Occasional weekend days may be required associated with conventions, trade show and as field requirements dictate.
  • Travel (40%) within the territory is expected for this position.

Subsidiaries Controller

STK is a bio-ag technology company that empowers growers around the globe with botanical-based solutions that meet the challenges of plant protection and sustainable agriculture.

We are looking for a subsidiaries controller to join the finance team in the company’s Israeli HQ. The subsidiaries controller will work in a dynamic, multicultural and innovative environment, mainly in the Americas.

Please send your CV to:

Duties and Responsibilities:

  • Manage the monthly, quarterly and annual financial closing processes and the reporting of the subsidiaries.
  • Develop, implement and ensure timely and accurate reporting in accordance with IFRS in the subsidiaries.
  • Develop, implement and ensure compliance with accounting policies and procedures in the subsidiaries.
  • Support the statutory requirements, tax reports and cash flows in the subsidiaries


  • CPA with Big 4 accounting firm experience
  • 2-4 years of experience in a multinational organization
  • Knowledge of Spanish – Advantage
  • Excellent English skills
  • Strong Excel skills
  • Experience working with ERP systems (SAP advantage)
  • Excellent organizational and multi-tasking skills
  • Ability to handle end-to-end responsibilities
  • Team player
  • Well-developed communication skills for dealing with different people in the organization
  • Join our team at STK

  • Accepted file types: pdf, txt, doc, docx.
  • Thank you for your interest in STK bio-ag technologies!

    We are pleased to answer your questions about our company and our products. Kindly use this form if you have any questions or need further information about our products and we’ll get back to you very soon.

Summit Agro becomes the Exclusive Partner of STK in the USA

Summit Agro will distribute STK Botanical Biopesticides and Innovative ‘Hybrids’ in the USA April 15,  (Petach Tikvah, Israel) – STK bio-ag technologies, the innovative Israeli leader in botanical sustainable crop protection, has partnered with Summit Agro U.S.A., which will become the exclusive distributor of STK products in the United States. Effective immediately, Summit Agro USA will assume the marketing and sales responsibility for STK products in the USA.  Currently registered STK products, include TIMOREX GOLD® and Timorex ACT®.  TIMOREX GOLD® is the world’s leading botanical-based biofungicide, used in nearly 40 countries and currently approved for use throughout the USA for a wide range of uses.  Timorex ACT®, is a new OMRI – listed biofungicide for organic farming and conventional agriculture.  Pending registration is REGEV®. REGEV® is the first ‘hybrid’ pre-mixed combination of a botanical-based biopesticide with a chemical pesticide. Comprised of Tee Tree Oil (TTO) and Difenoconazole, REGEV® is already used in approximately 15 countries and has proven activity on a wide range of horticultural and row crops. EPA registration is anticipated in the first quarter of 2020.   In addition to the STK products, Summit Agro will also assume the STK non-exclusive rights to sell AVIV® biological fungicide in the US. Already successfully launched in the US, AVIV® offers broad spectrum disease control in key fruit and vegetable crops. CEO Arye Tennebaum of STK declared, “I am delighted to announce this partnership with Summit Agro. They are a world-class organization, with a great team of highly knowledgeable and dedicated professionals to help fruit and vegetable growers with STK’s cutting edge technologies for plant health and yield growth.”   The President and CEO of Summit Agro USA, Bill Lewis, also commented, stating,” Summit Agro is very excited with this opportunity.  The addition of the STK brands to the existing strong Summit Agro brand family will allow Summit Agro to offer a wide range of disease control options.   We are confident that in coordination with our exclusive distribution partners, Helena Agri Enterprises and the Tenkoz Member Companies, we will be able to effectively deliver STK’s  innovative biological and ‘hybrid’ solutions to growers all across the USA. We know these are outstanding products and we’re very proud to have been selected to represent them in the USA.” About STK Founded in 1994, STK is a bio-ag technology company committed to sustainable crop protection through the use of innovative biological products. STK’s botanical-based solutions (BBS), a synergy of cutting-edge scientific research and technology, enhance the safety, yield and quality of multiple crops. STK’s botanical and hybrid solutions are easily integrated into conventional spraying programs, helping to advance the Integrated Pest Management approach to food production. About Summit Agro Summit Agro USA, located in Durham, NC is focused on working with our partners to identify, develop, and deliver innovative solutions that meet the needs of growers across the United States.  Summit Agro has a history of bringing innovative solutions to market and can manage the full process from initial development to sales. This integrated business approach enables us to provide reliable, high-quality products to US growers.  Whether the need is for insecticides, fungicides, or herbicides, Summit Agro has a full range of product offers to meet the needs of our customers.

Exclusive Distribution Agreement Announced For STK In Colombia

March 11, 2019 (Tel Aviv, Israel) – STK bio – ag technologies, the innovative Israel-based leader in bio-ag technologies and hybrid technologies for sustainable agriculture and aquaculture, and ADAMA , a global leader in crop protection products,  are announcing an exclusive agreement for the distribution of Timorex® Gold botanical-based bio-fungicide and STK REGEV® ‘Hybrid’ fungicide throughout Colombia. Under this exclusive agreement, ADAMA will sell the products throughout Colombia under STK’s trade name, Timorex® Gold and  STK REGEV®. Timorex® Gold is currently approved for use in Colombia for the following crops: Bananas, Rice, Ornamentals, Tomatoes, Avocados, Onions, Coffee, Corn, Tobacco, Potatoes, Passion fruit and Pitahaya. Colombia has also approved STK REGEV® on rice, with expected label extension on bananas, ornamentals, coffee and tomatoes. TIMOREX GOLD® is a highly effective and popular botanical-based bio-fungicide. Based on Tea Tree Oil, TIMOREX GOLD® is used by growers in nearly 40 countries throughout the Americas, Asia, Australia/New Zealand and Israel. TIMOREX GOLD® protects fruits and vegetables from a wide variety of diseases, substantially increases crop yields and quality, leaves no chemical residues, and makes TIMOREX GOLD® treated crops more competitive and agriculture more sustainable internationally. STK REGEV® is the world’s first ‘hybrid’ fungicide. It is used successfully in many countries and several regions of the world.  A ready to use mix, STK REGEV® is used exactly as other fungicides, but with the added benefits of reduced chemical residues and much better resistance management due to its highly complex formulation of Tea Tree Oil and Difenoconazole. This easy  to use fungicide serves as a ‘bridge,’ enabling farmers who have never used any biological product to try one, without having to mix, rotate or do anything differently, thereby expanding the use of biological products for sustainable agriculture. Commenting on the Agreement, STK CEO, Arye Tenenbaum declared, “We are very pleased to be partnering with such a great company as ADAMA, whose world-class team of experts will promote the use of these exceptionally innovative and highly-effective biological products to Colombian growers." ADAMA Andeans Countries CEO, Edgardo Iglesias commented, “TIMOREX GOLD® and STK REGEV® complement ADAMA’s portfolio in Colombia. With these highly-advanced technologies, we aim to continue providing valuable services and products to enable farmers to optimize yields and help them grow." STK Colombia Country Manager, Jose A. Estevez added, “I have great expectations for this strategic agreement to accelerate the STK market penetration and sales growth in Colombia.”


STK & Sipcam announce an exclusive Distribution Agreement for Timorex® Gold botanical-based biofungicide in Spain January 23, 2019 (Petach Tikvah, Israel) - STK bio – ag technologies, the innovative Israel-based leader in bio-ag technologies for sustainable agriculture, and Sipcam , a global leader in crop protection products,  are announcing an exclusive agreement for the distribution and market development  of Timorex® Gold bio fungicide throughout Spain. Under this exclusive agreement, Sipcam Iberia will market and sell the product throughout Spain under STK’s trade name, Timorex® Gold. Timorex® Gold is currently approved for use in Spain on cucumber and zucchini, with label extensions applied for grapes, tomatoes, eggplants, pumpkins and gherkins. Timorex® Gold is a highly- effective, eco-friendly, Maximum Residue Level exempted premium biofungicide, meeting the highest standards for sustainable agriculture. Timorex® Gold’s unique mode of action protects plants by rupturing fungus cells, increasing overall plant health and yields for a wide variety of fruits and vegetables. Timorex® Gold works to protect plants from Botrytis, Powdery Mildew, Black Sigatoka and many other fungal and bacterial diseases. While Timorex® Gold is currently used by growers in over 30 countries in various regions, Spain is the first country is Western Europe to approve its use. The plan is for Timorex® Gold to enter the rest of the Western Europe over the next few years. According to STK CEO Arye Tenenbaum, “The collaboration between STK bio – ag technologies & Sipcam Iberia is a testament to both companies’ commitment to sustainable agriculture and our mutual goal of providing innovative, effective and environmentally friendly solutions to growers. “  Sipcam CEO Pablo Montañés declared, “Sipcam has a rigorous process for identifying the most innovative and effective biological products and companies for distribution partnership.  We look forward to our collaboration with STK and rolling out Timorex® Gold with great success bringing a highly-effective new tool to hundreds of Spanish growers, completing the already interesting Sipcam portfolio in bioprotection.”