Job Title: Senior Instrumentation and Controls Engineer Job Description This role offers an opportunity for a Senior or strong intermediate Instrumentation and Controls Engineer to lead and support the development of a new nuclear reactor design.

You will work across conceptual, preliminary, and detailed design phases for nuclear and conventional systems, with a strong focus on system-level design and safety systems.

The position combines hands-on technical design, expert design verification, and mentoring 12 junior engineers while collaborating closely with large, multidisciplinary project teams on major nuclear projects.

Responsibilities Support preliminary and conceptual design phases for system upgrades and improvements to proven nuclear plant system designs.

Lead and contribute to the development of a new nuclear reactor design from conceptual design through preliminary and detailed design phases.

Participate in the preparation of design plans, methodologies, and strategies for instrumentation and controls systems.

Ensure compliance with applicable codes, standards, and regulations, including CSA, CNSC, IAEA, IEC, IEEE, and relevant client design standards and guides.

Perform design reviews and design verification of technical documents prepared by others to ensure accuracy and adherence to requirements.

Provide technical guidance and apply sound engineering principles to resolve complex technical issues.

Ensure the quality, consistency, accuracy, and completeness of all engineering deliverables.

Deliver technical engineering tasks and deliverables within specified timelines and budgets.

Develop and design preliminary and detailed engineering I&C; packages for nuclear and conventional systems.

Prepare and/or supervise the preparation of I&C; engineering deliverables, including instrument indexes, installation details, location drawings, function block logic diagrams, control and monitoring functional descriptions, datasheets, calibration sheets, P&IDs;, material requisitions, and bills of materials.

Perform or oversee calculations for control valves, flow elements, and pressure safety valves.

Lead or participate in the evaluation of alternatives and selection of instrumentation and control equipment.

Participate in cross-functional initiatives and interface with multi-disciplinary project teams to ensure integrated system designs.

Prepare or review engineering quotation requests and tender technical evaluations in accordance with quality programs and operating procedures.

Review vendor designs for compliance with technical specification requirements, industry standards, and guidelines, and participate in Factory Acceptance Tests (FAT) as required.

Provide in office implementation support for instrumentation installations and participate in Site Acceptance Tests (SAT).

Conduct field walkdowns at client sites and prepare detailed walkdown reports.

Support the Discipline Lead Engineer with timely updates on engineering progress, performance, schedule, and budget.

Prepare engineering deliverables in accordance with nuclear quality assurance programs and project requirements.

Effectively manage assigned work, including prioritizing tasks, executing work scopes, managing schedules and budgets, and reporting status to meet project goals.

Attend site visits and technical meetings as required to support design, review, and implementation activities.

Mentor and support 12 junior engineers, providing training and guidance on complex systems and design practices.

Focus on expert design verification and design reviews, particularly for safety systems and complex system-level designs.





Develop system-level requirements and Control Function Specification designs to guide programmers and controls engineers in implementation.

Support all major projects by contributing specialized knowledge in nuclear safety systems and system-level instrumentation and control design.

Promote and contribute to a positive, team-oriented work environment.

Essential Skills Proven experience as an Instrumentation and Controls Engineer with a robust focus on instrumentation and process automation.

Professional Engineering ( designation or equivalent professional engineering registration.

Design experience in the nuclear industry, preferably with reactor systems.

Experience working on nuclear safety systems such as SDS-1 and SDS-2, with emphasis on system-level design rather than only individual instruments.

Demonstrated experience in process automation from an I&C; perspective, particularly with instrumentation such as thermocouples, RTDs, actuators, and control valves.

Solid knowledge of advanced control strategies including cascade control and feedforward control.

Hands-on experience with flow measurement, level measurement, cable block diagrams, and bubbler systems.

Design experience producing datasheets, control narratives, logic diagrams, loop diagrams, wiring diagrams, and I/O or instrument indexes.

Experience preparing conceptual documentation and assessments to support new system designs, particularly in large, complex projects.

Familiarity with conceptual and preliminary design phases for large-scale engineering projects.

Strong system design skills, including development of core functional requirements and Control Function Specification designs for implementation by programmers.

Experience with automation, instrumentation controls, and controls engineering, including SCADA and I&C; systems.

Proficiency in preparing and reviewing loop diagrams and wiring diagrams for instrumentation and control systems.

Ability to perform and review HAZOP-related activities or support hazard and operability considerations in design.

Experience preparing engineering deliverables for both nuclear and conventional systems under nuclear quality assurance programs.

Ability to manage engineering work scopes, including scheduling, budgeting, and reporting, within a project environment.

Strong communication skills and the ability to provide clear technical guidance and mentorship to junior engineers.

Team-oriented mindset with a demonstrated ability to work effectively in multi-disciplinary, cross-functional project teams.

Additional Skills & Qualifications Experience in nuclear plant design for Nuclear Island or Balance of Plant (BOP), with Nuclear Steam Plant experience preferred.

Background in nuclear projects involving major utilities or operators such as Bruce Power or OPG.

Prior experience supporting safety systems and system-level design in other highly regulated industries such as oil and gas or mining is considered an asset.

Experience focusing on complete system design rather than solely on individual instrumentation equipment.

Familiarity with Smart

Plant for modeling and data-centric design of instrumentation and control systems.

Experience using Plant 3D or similar 3D modeling tools for plant and system layout is required.





Existing nuclear clearance is highly desirable to enable rapid onboarding to nuclear facilities and projects.

Experience participating in or supporting HAZOP studies and other formal safety and risk assessments.

Exposure to or collaboration with major engineering and consulting firms in the nuclear sector is an asset.

Strong capability in expert design reviews and design verification, particularly for complex nuclear systems.

Demonstrated experience training and mentoring junior or intermediate engineers on complex systems and nuclear design practices.

Ability to interpret and apply applicable codes and standards such as CSA, CNSC, IAEA, IEC, and IEEE.

Familiarity with SCADA systems, programming concepts, and the creation of requirements for software implementation teams.

Experience participating in Factory Acceptance Tests (FAT) and Site Acceptance Tests (SAT) for instrumentation and control systems.

Work Environment This position follows a hybrid work model, with three days per week in the office and two days working from home.

The office is located in Mississauga and provides a dedicated cubicle within a larger engineering team environment.

You will work as part of a large project team comprising several hundred engineers who support design phases prior to construction.

The role involves close collaboration with discipline leads, functional managers, and cross-functional teams, as well as occasional site visits and on-site support for implementation, FAT, SAT, and field walkdowns.

The environment emphasizes a positive, team-oriented culture with strong support from leadership and ample opportunities to contribute to major nuclear projects using modern engineering and modeling tools such as Smart

Plant and Plant 3D.

Job Type & Location This is a Contract to Hire position based out of Mississauga, ON.

Pay and Benefits The pay range for this position is $75.00 - $85.00/hr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.

Workplace Type This is a hybrid position in Mississauga,ON. À propos d'Actalent Actalent est un leader mondial dans les services dingénierie et de sciences ainsi que dans les solutions de talents.

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📌 Senior Instrumentation Engineer (Mississauga)
🏢 Actalent
📍 Mississauga