Are you a Professional Geoscientist in Ontario or a Geoscientist-in-training with 3 years related experience? Are you proficient in conducting research, preparing specialized sample for laboratory testing and field studies/testing, and participating in studies to resolve complex and unique problems associated with the use of engineering materials? Are you knowledgeable of the theories, practices, and principles of earth science related to aggregates and associated engineering materials used in the construction and maintenance of highways and structures?

If so, consider this opportunity to join our progressive Soils and Aggregates team as the Aggregate Geologist, with the Ministry of Transportation.

About the job In this role you will:

- Conduct research, laboratory and field testing, and participate in various studies to resolve complex and unique problems related to use of engineering materials using proper scientific test methodology.
- Perform a variety of complex and specialized analytical tests, collect/receive samples through special data analysis, statistical tools, and reporting techniques and following approved procedures.
- Prepare aggregate samples, undertake various testing following applicable test methods and record data/results.
- Participate in training and certification for aggregate testing and prepare specialized samples to undertake petrographic examination of aggregate, rock, concrete, using various laboratory equipment and materials..
- Undertake field and source inspection/investigation and sampling of aggregate materials for testing to support assessment of aggregates and geological features.
- Implement and evaluate new test methods and equipment for determining aggregate durability under various conditions and environments.
- Procure, ensure availability and maintain inventory of laboratory samples, supplies and equipment and overseeing maintenance, verification, calibration, and repair of equipment.

What you bring to the team

Mandatory requirements

- Position requires registration as a Skilled Geoscientist in Ontario or Geoscientist-in-training with 3 years related experience, registered with the association of Professional Geoscientists of Ontario (PGO).
- Valid Class G drivers' license and the ability to travel independently to areas not served by public transportation to attend meetings and conduct field work.

Technical Skills

- Knowledge of the theories, practices, and principles of earth science related to aggregates and engineering materials used for infrastructure construction and maintenance.
- Knowledge of aggregate industry, government, and academic activities and technologies, including processing, performance, and behaviour of aggregates and associated engineering materials.- Knowledge of the nature, distribution, and mode of occurrence of bedrock in Ontario to understand aggregate source problems.

Laboratory Knowledge

- Knowledge of established laboratory procedures, standards and techniques for aggregate physical and gradation testing.
- Knowledge of the principles of material technology applicable to test protocols, procedures methods and analytical systems to conduct specialized tests and evaluate results.
- Knowledge of laboratory testing standards for aggregates (i.e., ministry laboratory testing manual, CSA, ASTM, AASHTO and others) and various equipment used.
- Knowledge to conduct detailed petrographic examination of aggregates and concrete,



by using specialized equipment - microscopes and x-ray diffractometer to identify minerals, material textures and structures.
- Knowledge of laboratory health and safety practices/guidelines, laboratory quality control and management systems and MTO quality assurance principles and systems.

Research and Organizational Skills

- Research, plan and possess organizational knowledge to conduct specialized testing, analyze data, and complete performance studies of aggregates and allied products.
- Interpret data acquired from various testing and analysis mechanism using various statistical tools and equipment to make informed decisions or improve outcomes.
- Evaluate and consolidate input from literature on specific aggregate problem situations to devise site-specific or general solutions to a problem through field and laboratory study.

Computer and Communication Skills

- Computer competency and knowledge of software programs including word-processing, spreadsheet, database, AutoCAD and ArcView programs.
- Communication skills to prepare reports, letters, and other written communications on test results, document issues and related information, including presenting to a wide range of audience.

Other Skills

- Demonstrated interpersonal and communication skills to work effectively as part of a team with technical and professional staff and across the organization environment.
- Ability to provide instruction and training to laboratory technicians and ministry counterparts/staff, under the supervision of the reporting manager.

Don't meet every qualification?

If you are excited about this position and meet most, but not all, of the listed qualifications, please still consider applying. We recognize that no one person might have every qualification in this job ad, and you just might be the right candidate!

How we support diversity, inclusion and accessibility

We are building an inclusive workforce that reflects the communities we serve. We encourage everyone interested in working with us to apply, including people with disabilities, Indigenous, Black and racialized individuals, as well as people from all ethnicities, cultures, sexual orientations, gender identities and gender expressions.

Our hiring process is accessible, consistent with Ontario's Human Rights Code and the Accessibility for Ontarians with Disabilities Act, 2005. We are working to prevent and remove barriers in our hiring processes and can offer accommodation to address specific needs related to Code-protected grounds such as disability, family status and religion. For more information about accommodation during the hiring process please contact us.

Learn more about the work the OPS is doing to create an inclusive, anti-racist, accessible and diverse workplace:

- diversity, equity and inclusion initiatives
- accessibility
- Anti-Racism Policy

Additional information

Address:

- 1 English Permanent, 95 Arrow Rd, North York, Toronto Region

Compensation Group: Ontario Public Service Employees Union

Understanding the job ad - definitions

Schedule:

6





Category:

Science

Posted on:

Tuesday, October 13, 2026

Note:

- The information that you provide for the purpose of this competition and the results from this competition may be used to fill other positions. These positions may be of various tenures including short-term assignments. Your information and the results from this competition will be retained for the purpose of filling vacancies in accordance with the applicable collective agreement or policy provisions.
- T-MT-249885/26

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 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 Wednesday, October 28, 2026 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.

The Ontario Public Service is an inclusive employer.

Accommodation is available under the Ontario's Human Rights Code .

Apply Online

Pre Screening Questions

Are you a Professional Geoscientist in Ontario or Geoscientist-in-training with 3 years related experience, registered with the association of Professional Geoscientists of Ontario (PGO)?

Yes No

Do you have a Valid Class G drivers' license and the ability to travel independently to areas not served by public transportation to attend meetings and conduct field work?

Yes No

📌 Aggregate Geologist (North York)
🏢 Ontario Ministry of Transportation/ Ministère des Transports de l’Ontario
📍 North York