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Aquatic Toxicology Technologist

Ministry of the Environment, Conservation and Parks

Environmental Sciences and Standards Division, Laboratory Services Branch

Etobicoke, ON


Clean, safe source waters is essential in protecting the health of people, the natural environment and communities in Ontario. By joining the Ministry of the Environment, Conservation and Parks, in our Laboratory Services Branch, you will contribute to the protection of our lakes, rivers and streams by supporting the analytical testing of environmental samples for toxicity. If you are interested in providing specialized analytical laboratory support in support of environmental monitoring programs, special studies, emergency responses, litigation and method development, then please consider this exciting opportunity.

Effective January 1st, 2024 the salary range for this position is $1,286.92 to $1,518.87 per week in compliance with OPSEU Unified Bargaining Unit collective agreement provisions. The new rates, effective retroactive to January 1, 2024, were recently confirmed and dates for implementation of the new salary rates are still to be determined.

OPS Commitment to Diversity, Inclusion, Accessibility, and Anti-Racism:

We are committed to build a workforce that reflects the communities we serve and to promote a diverse, anti-racist, inclusive, accessible, merit-based, respectful and equitable workplace.

We invite all interested individuals to apply and encourage applications from people with disabilities, Indigenous, Black, and racialized individuals, as well as people from a diversity of ethnic and cultural origins, sexual orientations, gender identities and expressions.

Visit the OPS Anti-Racism Policy and the OPS Diversity and Inclusion Blueprint pages to learn more about the OPS commitment to advance racial equity, accessibility, diversity, and inclusion in the public service.

We offer employment accommodation across the recruitment process and all aspects of employment consistent with the requirements of Ontario's Human Rights Code. Refer to the "How to apply" section if you require a disability-related accommodation.

What can I expect to do in this role?

In this role, you will:

  • provide general laboratory testing culturing and related activities in the Aquatic Toxicology Unit

  • provide data management, interpretation and reporting as well as quality management support to the unit

  • possibility of field work to collect samples

NOTE: Job requires working weekends and holidays on a rotating basis (up to 26 weekends/year). Schedule to be determined.

How do I qualify?


  • The position requires the successful candidate to have a valid class G driver's licence or equivalent. The offer of employment is conditional upon the successful candidate providing proof that they have a valid driver's licence upon being hired.

Environmental Testing Knowledge and Experience:

  • You have knowledge of the science, theories, principles and practices of aquatic biology (e.g. toxicity testing and aquaculture) as it applies to environmental testing

  • You have knowledge of systems for maintaining appropriate environmental conditions for maintaining healthy organisms in cultures and for testing

  • You have the knowledge of the techniques and practices of humane test culture maintenance to ensure healthy test specimens

  • You have knowledge of the techniques for the collection and preparation of water and sediment samples for biological testing to provide advice to clients or to take samples

  • You have practical experience in an environmental lab culturing and performing aquatic toxicity testing and bioaccumulation studies using aquatic organisms such as Rainbow trout, Fathead minnows, Lumbriculus variegatus, Hexagenia spp., Hyalella azteca, Chironomus dilutus and Daphnia magna.

Environmental Legislation and Guidelines:

  • You know relevant occupational health and safety legislation (e.g. Workplace Hazardous Materials Information System (WHMIS) and Safety Data Sheets (SDS))

  • You have knowledge of effluent toxicity limits and water quality objectives under provincial and federal regulations and guidelines

  • You have knowledge of Ontario and Canadian water discharge regulations and associated toxicity testing requirements to perform tests correctly

  • You have knowledge of laboratory quality assurance practices and ISO 17025 standards

Project Management, Analytical and Research Skills:

  • You have experience managing multiple, technical projects and scientific studies

  • Job requires analytical and investigative skills to summarize test findings and provide conclusions and recommendations or best professional judgment, (e.g. recommending follow-up actions to management on standard method requirements)

  • You have diagnostic and problem solving skills to detect and react to a problem

  • Job requires knowledge and experience with the operation and maintenance of basic analytical instrumentation to measure chlorine (amperometric titration) and ammonia content (specific ion meter) as well as pH (pH meter) and conductivity (conductivity meter) of water samples to ensure quality results and basic laboratory equipment such as balances, microscopes and pipettes.

Computer and Communication Skills:

  • You can communicate in a clear and concise manner

  • You can draft a variety of written materials and have experience preparing scientific reports and papers for publication

  • You contribute to a team environment and share duties in a collaborative manner

  • You have knowledge of databases such as Laboratory Information Management System, mathematical and statistical tools, word processing, data management and assessment to evaluate and summarize test results.

How to apply:

  1. You must apply online.

  2. Your cover letter and resume combined should not exceed five (5) pages. For tips and tools on how to write a concise cover letter and resume, review the Writing a Cover Letter and Resume: Tips, Tools and Resources.

  3. Customize your cover letter and resume to the qualifications listed on the job ad. Using concrete examples, you must show how you demonstrated the requirements for this job. We rely on the information you provide to us.

  4. Read the job description to make sure you understand this job.

  5. OPS employees are required to quote their WIN EMPLOYEE ID number when applying.

  6. If you require a disability related accommodation in order to participate in the recruitment process, please Contact Us to provide your contact information. Recruitment services team will contact you within 48 hours.

Please be advised that the results of this competition may be used to form an eligibility list of qualified candidates to potentially fill future vacancies represented by the Ontario Public Service Employees Union (OPSEU). In accordance with the Collective Agreement, eligibility lists are shared with OPSEU representatives. By applying to this competition, you are providing consent that your name may be shared with OPSEU representatives.

All external applicants (including former employees of the Ontario Public Service) applying to a competition in a ministry or Commission public body must disclose (either in the cover letter or resume) previous employment with the Ontario Public Service. Disclosure must include positions held, dates of employment and any active restrictions as applicable from being rehired by the Ontario Public Service. Active restrictions can include time and/or ministry-specific restrictions currently in force, and may preclude a former employee from being offered a position with the Ontario Public Service for a specific time period (e.g. one year), or from being offered a position with a specific ministry (either for a pre-determined time period or indefinitely). The circumstances around an employee's exit will be considered prior to an offer of employment.

Remember: The deadline to apply is Monday, April 29, 2024 11:59 pm EDT. Late applications will not be accepted.

We thank you for your interest. Only those selected for further screening or an interview will be contacted.

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