markham, on security officer Jobs – 48 Openings This Week

Nuclear Security Officer
Ontario Power Generation —Pickering, ON
- $33.09–$54.49 an hour
- Weekends as needed
- CPR Certification
- Bachelor's
- First Aid Certification
1d
Peel Regional Police - Security Guard
Synergy Protection Group Inc. —Mississauga, ON
- $20.05–$21.68 an hour
- Full-time
- High school diploma or GED
- Bachelor's
- First Aid Certification
- Wellness program
- Disability insurance
Quick apply
1h
Security Officer (Part-time) - Pickering
Great Canadian —Pickering, ON
- $23.69–$25.75 an hour
- Part-time
- CPR Certification
- Customer service
- Microsoft Office
Security Guard
Markham Suites Hotel Limited —Markham, ON
- $20–$23 an hour
- Part-time
- CPR Certification
- Microsoft Excel
- Hotel
Quick apply
Security Officer (Part-time) - Port Perry
Great Canadian —Port Perry, ON
- $20.53–$25.66 an hour
- Part-time
- CPR Certification
- Customer service
- Hotel
15h
Security Guard - Mission Critical Facility - Weekend Nights
Securitas —Toronto, ON
- $26.25 an hour
- Weekends only
- CPR Certification
- Customer service
- First Aid Certification
3d
High-Profile Part-Time Hospital Security Guard (Richmond Hill)
EXECUTEK INTERNATIONAL —Richmond Hill, ON
- From $20 an hour
- Part-time
- Microsoft Word
- CPR Certification
- First Aid Certification
- Dental care
- Vision care
Quick apply
Security Guard (Reserve Team) - Mission Critical Facility
Securitas —Richmond Hill, ON
- $26.25 an hour
- Full-time
- CPR Certification
- Customer service
- First Aid Certification
Security/Control Room Supervisor/Operations Responder - (Reserve Team) - Mission Critical Facility
Securitas —Toronto, ON
- $29.00–$33.62 an hour
- Full-time
- CPR Certification
- Customer service
- First Aid Certification
Security Guard (Reserve Team) - Mission Critical Facility
Securitas —Vaughan, ON
- $26.25 an hour
- Full-time
- CPR Certification
- Customer service
- First Aid Certification
Security Guard (Reserve Team) - Mission Critical Facility
Securitas —Toronto, ON
- $26.25 an hour
- Full-time
- CPR Certification
- Customer service
- First Aid Certification
Security Officer, ACSO Security Officer, ACSO Construction Toronto, ON, CA May 9, 2026
Aecon Group —Toronto, ON
- $100,000–$150,000 a year
- Contracts
Security Supervisor (Full-time) - GBH
Great Canadian —Port Perry, ON
- $27.25–$31.39 an hour
- Weekends as needed
- Microsoft Word
- Microsoft Excel
- Microsoft Access
6d
Seneca Polytechnic - Full Time Campus Security Supervisor
Paladin Security —North York, ON
- $25–$26 an hour
- Full-time
- CPR Certification
- Supervising experience
- First Aid Certification
Quick apply
3d
Security Professional - Access Control Officer
Allied Universal —Woodbridge, ON
- $19.87 an hour
- Part-time
- Customer service
- High school diploma or GED
- First Aid Certification
Quick apply
3d
Student Campus Security Guard
Condor Security —Toronto, ON
- $18–$20 an hour
- Full-time
- CPR Certification
- Customer service
- No experience needed
- Dental care
Protection Services Officer
Art Gallery of Ontario —Toronto, ON
- $22.40–$27.96 an hour
- Part-time
- Customer service
- First Aid Certification
- Communication skills
Bilingual Security Guard, English/Mandarin or Cantonese (Part Time)
Shield Security Group —Markham, ON
- $18.50–$19.00 an hour
- 12 hour shift
- Bilingual
- Customer service
- English
Quick apply
18h
Casual/Part Time Security Guard
Guardteck Security —Ontario
- $18.00–$19.50 an hour
- English
- Communication skills
Quick apply
Security/Control Room Supervisor/Operations Responder - (Reserve Team) - Mission Critical Facility
Securitas —Richmond Hill, ON
- $29.00–$33.62 an hour
- Full-time
- CPR Certification
- Customer service
- First Aid Certification
Security/Control Room Supervisor/Operations Responder - (Reserve Team) - Mission Critical Facility
Securitas —Vaughan, ON
- $29.00–$33.62 an hour
- Full-time
- CPR Certification
- Customer service
- First Aid Certification
Security/Control Room Supervisor/Operations Responder - (Reserve Team) - Mission Critical Facility
Securitas —Toronto, ON
- $29.00–$33.62 an hour
- Full-time
- CPR Certification
- Customer service
- First Aid Certification
Site Security Lead - Operational Excellence (Former Federal, Provincial, Municipal Police Officer or Military Experience Required)
Securitas —Toronto, ON
- $91,520 a year
- Monday to Friday
- Customer service
- English
- Microsoft Office
- Dental care
Licensed Security Officer/Guard
The Career Foundation —Toronto, ON
- $18–$19 an hour
- Part-time
- Microsoft Excel
- English
- Travel
Quick apply
Field Supervisor
BLACKBIRD SECURITY INC. —Toronto, ON
- $19–$20 an hour
- Full-time
- Microsoft Word
- English
- Supervising experience
Quick apply

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Nuclear Security Officer

Ontario Power Generation
Pickering, ON

Apply Now

Job details

Full-time
1 day ago

Skills

CPR Certification
Law
Bachelor's
First Aid Certification
College diploma

Full job description

Location: Pickering, ON, CA, L1V 2R5

Req ID: 56821

Status: Permanent Full Time

Working Conditions: On-site

Education Level: College Diploma or University Degree in Police Foundations, Law & Security Administration, or Criminology

Base Location: Pickering, ON

Shift: Days and/or rotating shifts including nights, weekends and holidays

Travel: 10%

Deadline to Apply: June 18, 2026

Salary Range: $33.09 - $54.49 Per Hour

Electrify your career and help build a brighter tomorrow.

Every generation has a challenge that defines them. At OPG, we are calling on all innovators, disruptors, thought leaders and change-makers. Join us as we work to electrify life in one generation and build a sustainable future powered by our electricity, our ideas, and our people. Join OPG and make history.

Whether you work in the skilled trades or are a business professional, a career at OPG is an opportunity to electrify your life on - and off - the job.

JOB OVERVIEW

Ontario Power Generation (OPG) is looking for a dynamic, strategic and results-driven professional to join our team in the role of Armed Nuclear Security Officer.

Reporting to the Security First Line Manager, this position is responsible to carry out assigned duties of a Nuclear Security Officer (NSO) or a tactically trained Nuclear Security Officer at a Nuclear Generating Station (ANSO). This includes, but is not limited to, access controls, foot and mobile patrols, searches, enquiries and incident investigations, monitoring and lock and key control activities.

KEY ACCOUNTABILITIES

Carry out duties as a Nuclear Security Officer, including patrols, access control, and enforcement of security regulations and procedures.
Monitor, control, and document entry/exit of personnel and vehicles; conduct searches for weapons, contraband, and nuclear material.
Respond to alarms, emergencies, and incidents; conduct investigations, gather evidence, prepare reports, and support law enforcement as required.
Use and maintain security monitoring equipment, firearms, less-lethal options, and communication tools in compliance with regulations and policies.
Issue and manage radiation dosimetry badges; monitor and support radiation safety protocols for personnel, vehicles, and materials.
Participate in emergency drills, exercises, and mandatory training; maintain qualifications and fitness for duty.
Administer lock and key control, access card programs, and ID processing for personnel and site security.
Provide training to new officers, assist visitors and staff, operate communications systems, and uphold health, safety, and well-being standards for self and others.

QUALIFICATIONS

College Diploma or University Degree in Police Foundations, Law & Security Administration, Criminology.
2 years of working experience in an enforcement, statutory compliance, military, emergency management field or comparable security environment is considered an asset.
Qualifications normally acquired during successful continuous experience in enforcement, statutory compliance, military, emergency management field or comparable security environment are considered an asset.
Valid G-Class Ontario driver's licence.
Valid Standard First Aid and CPR-C certificates. (Please attach a copy with your application)
Valid Firearms Possession and Acquisition Licence (PAL). (Please attach a copy with your application)
Have the ability to successfully complete a comprehensive Nuclear Security Officer Training Course, successfully pass fitness, psychological, and medical testing, and obtain a Level II Security Clearance.

The successful candidate will exhibit uncompromising integrity and commitment to upholding corporate values, and the OPG Code of Business Conduct.

OPG is committed to fostering an inclusive, equitable, and accessible environment. If you require accommodation during the selection process, please contact [email protected]

What makes a career at OPG different?

With operations across Ontario, OPG is one of the most diverse power producers in North America. As the largest generator in Ontario, we meet approximately 50% of the province’s electricity needs, largely from low-carbon sources like nuclear and hydro.

As we work to achieve our vision of Electrifying life in one generation, OPG and our family of companies are also helping advance the development of new low-carbon technologies such as Small Modular Reactors (SMRs), refurbishment projects, and electrification initiatives to help power the growing demands of a growing economy. Join OPG and make history.

Please submit your application online at https://jobs.opg.com/. OPG thanks all those who apply; however, only candidates considered for an interview will be contacted.

#LI-Onsite

Please note: All job postings at OPG are to fill existing vacancies within our organization.

OPG may use artificial intelligence (AI) tools as part of the applicant screening process. However, applications will also be reviewed by a member of our Recruitment team to ensure a fair and thorough assessment.

The base salary range considers many factors including, but not limited to experience, education, and training, including any collective agreement requirements for union represented positions. It is not typical for the salary to be offered near the top of the range, and salary is dependent on numerous factors. For management roles, the base salary range does not represent the total compensation package. The total compensation package for regular full-time management roles includes pay-for-performance programs for annual and medium time periods. Maintaining a high-performance culture and excellence is a core expectation of every member of our leadership team and is rewarded through the established compensation framework.

OPG is committed to employment equity. As such, we encourage applicants from equity-seeking communities (Indigenous Peoples, racialized persons, persons with disabilities, and women). We strongly believe that alleviating the under-representation of equity-seeking individuals will create a stronger OPG team and allow us to better serve the needs of our diverse communities.

In order to fulfill the above-mentioned purpose, priority in hiring may be given to qualified persons who self-identify as a member of equity-seeking groups as identified in the application process. This initiative constitutes a special program under the Human Rights Code/Canadian Human Rights Act.

Apply Now

Refine Your Search

security officer jobs in markham, on

Nuclear Security Officer

Peel Regional Police - Security Guard

Security Officer (Part-time) - Pickering

Security Guard

Security Officer (Part-time) - Port Perry

Security Guard - Mission Critical Facility - Weekend Nights

High-Profile Part-Time Hospital Security Guard (Richmond Hill)

Security Guard (Reserve Team) - Mission Critical Facility

Security/Control Room Supervisor/Operations Responder - (Reserve Team) - Mission Critical Facility

Security Guard (Reserve Team) - Mission Critical Facility

Security Guard (Reserve Team) - Mission Critical Facility

Security Officer, ACSO Security Officer, ACSO Construction Toronto, ON, CA May 9, 2026

Security Supervisor (Full-time) - GBH

Seneca Polytechnic - Full Time Campus Security Supervisor

Security Professional - Access Control Officer

Student Campus Security Guard

Protection Services Officer

Bilingual Security Guard, English/Mandarin or Cantonese (Part Time)

Casual/Part Time Security Guard

Security/Control Room Supervisor/Operations Responder - (Reserve Team) - Mission Critical Facility

Security/Control Room Supervisor/Operations Responder - (Reserve Team) - Mission Critical Facility

Security/Control Room Supervisor/Operations Responder - (Reserve Team) - Mission Critical Facility

Site Security Lead - Operational Excellence (Former Federal, Provincial, Municipal Police Officer or Military Experience Required)

Licensed Security Officer/Guard

Field Supervisor

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