markham, on security Jobs – 496 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
Security Guard – Full-Time | Corporate Environment | Markham - July 2026 Start
Wincon Security —Markham, ON
- $18–$19 an hour
- 8 hour shift
- CPR Certification
- Customer service
- First Aid Certification
- Dental care
- Employee assistance program
Quick apply
7d
Part-Time Security Guard - Commercial Corporate Site - York Region (Markham)- $18.50/hr
Wincon Security —Markham, ON
- $18.50 an hour
- Part-time
- CPR Certification
- English
- First Aid Certification
Quick apply
2d
Stadium Event Security Guard (Toronto)
Sword Security —Toronto, ON
- $20–$21 an hour
- Weekends as needed
- First Aid Certification
- Communication skills
Quick apply
Executive Security Operative (Night Shifts)
Avante Security Inc —North York, ON
- $20–$24 an hour
- 12 hour shift
- CPR Certification
- Customer service
- High school diploma or GED
- Disability insurance
- Dental care
Quick apply
Security Guard - Mission Critical Facility - Weekend Nights
Securitas —Toronto, ON
- $26.25 an hour
- Weekends only
- CPR Certification
- Customer service
- First Aid Certification
3d
Overnight Weekend Security Guard - Residential Property - York Region (North Markham) - $18.00/HR
Wincon Security —Markham, ON
- $18 an hour
- Weekends only
- CPR Certification
- Customer service
- Writing skills
- Flexible schedule
Quick apply
9d
Tactical Security Guard
BLACKBIRD SECURITY INC —Ajax, ON
- $18.50–$19.50 an hour
- Part-time
- Customer service
- Microsoft Office
- Warehouse experience
- Flexible schedule
Quick apply
23h
Alarm & Security Systems Technician (Commercial/Residential)
Avante Security Inc —North York, ON
- $27–$38 an hour
- Full-time
- Power tools
- In-person
- Mechanical knowledge
- Dental care
- Employee assistance program
Quick apply
Security Supervisor (Full-Time) - Overnight Shift – Downtown Markham | High End Commercial | $19/hr
Wincon Security —Markham, ON
- $19 an hour
- Full-time
- Microsoft Word
- CPR Certification
- Microsoft Excel
- Dental care
- Employee assistance program
Quick apply
3d
Loss Prevention Investigator
Holt Renfrew —Toronto, ON
- $17.60–$30.50 an hour
- Full-time
- Microsoft Powerpoint
- Bilingual
- Microsoft Word
- Dental care
- Tuition reimbursement
Casual/Part Time Security Guard
Guardteck Security —Ontario
- $18.00–$19.50 an hour
- English
- Communication skills
Quick apply
Security Guard Scheduler/Security Dispatcher - Part-Time - $19.00/hr
Wincon Security —Scarborough, ON
- $19 an hour
- Part-time
- Microsoft Word
- Customer service
- Writing skills
- Flexible schedule
Quick apply
15h
Mobile Patrol Guard
Condor Security —Toronto, ON
- $20 an hour
- Weekends as needed
- CPR Certification
- Customer service
- Writing skills
Quick apply
Security Guard - Scarborough
Commissionaires Great Lakes —Scarborough, ON
- $19.57 an hour
- Full-time
- Microsoft Word
- CPR Certification
- Microsoft Excel
Quick apply
9h
Security Screening Supervisor - Mission Critical Facility (PT Weekends)
Securitas —Richmond Hill, ON
- $29.40–$29.90 an hour
- Part-time
- CPR Certification
- First Aid Certification
- Communication skills
4d
Security Guard (Reserve Team) - Mission Critical Facility
Securitas —Richmond Hill, ON
- $26.25 an hour
- Full-time
- CPR Certification
- Customer service
- First Aid Certification
Concierge Security Professional – Richmond Hill
Condor Security —Richmond Hill, ON
- $18–$20 an hour
- Weekends as needed
- CPR Certification
- No experience needed
- First Aid Certification
- Dental care
Senior Tactical Security Supervisor- TTC
The West Egg Group Security Services —Toronto, ON
- $24 an hour
- Weekends as needed
- Customer service
- High school diploma or GED
- Supervising experience
- Dental care
1d
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

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security jobs near markham, on

Nuclear Security Officer

Ontario Power Generation -
Pickering, ON

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Job details

Full-time
$33.09–$54.49 an hour
1 day ago

Qualifications

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.

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Refine Your Search

security jobs in markham, on

Nuclear Security Officer

Security Guard – Full-Time | Corporate Environment | Markham - July 2026 Start

Part-Time Security Guard - Commercial Corporate Site - York Region (Markham)- $18.50/hr

Stadium Event Security Guard (Toronto)

Executive Security Operative (Night Shifts)

Security Guard - Mission Critical Facility - Weekend Nights

Overnight Weekend Security Guard - Residential Property - York Region (North Markham) - $18.00/HR

Tactical Security Guard

Alarm & Security Systems Technician (Commercial/Residential)

Security Supervisor (Full-Time) - Overnight Shift – Downtown Markham | High End Commercial | $19/hr

Loss Prevention Investigator

Casual/Part Time Security Guard

Security Guard Scheduler/Security Dispatcher - Part-Time - $19.00/hr

Mobile Patrol Guard

Security Guard - Scarborough

Security Screening Supervisor - Mission Critical Facility (PT Weekends)

Security Guard (Reserve Team) - Mission Critical Facility

Concierge Security Professional – Richmond Hill

Senior Tactical Security Supervisor- TTC

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

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