Office Administrator & Security Officer

Office Administrator & Company Security Officer   Job Category  :  Administration

Requisition Number  :  OFFIC
004407
Posted :
September 3, 2026
Full-Time
Locations  Showing 1 location
Description   Role Summary
The Office Administrator & Company Security Officer plays a key role in supporting Modern Niagara's security, compliance, and administrative operations. Acting as the designated Company Security Officer (CSO) under the federal Contract Security Program (CSP), this role oversees personnel security clearances, compliance requirements, and coordination with government security authorities while supporting Alternate Company Security Officers (ACSOs). In addition, the role provides administrative support to leadership, coordinates office initiatives, and supports corporate events and employee engagement activities.

Success in this position requires strong organization, attention to detail, discretion, and the ability to balance multiple priorities in a fast-paced environment.
Why This Role Matters to Modern Niagara
This role plays a critical part in maintaining Modern Niagara's compliance with government security requirements and supporting successful project delivery. By proactively managing security clearance processes, supporting project teams, and providing guidance to Alternate Company Security Officers, this position helps mitigate risk and ensures uninterrupted access to secure project opportunities. Beyond security compliance, the role also supports leadership and employee engagement initiatives that contribute to a positive workplace experience and efficient office operations.
Key Impact / Purpose
Ensure compliance with Contract Security Program requirements and maintain Modern Niagara's security clearance obligations.
Support project teams, field operations, and ACSOs by providing guidance on security clearance and compliance requirements.
Deliver high-quality administrative, coordination, and office support services that contribute to organizational effectiveness and required clearances.
Duties and Responsibilities
Security & Compliance
Serve as Modern Niagara's designated Company Security Officer (CSO) under the Contract Security Program (CSP).
Maintain accountability for the organization's Facility Security Clearance (FSC).
Coordinate personnel security clearances, renewals, transfers, and upgrades.
Ensure Security Requirements Check Lists (SRCLs) and supporting documentation are completed and maintained.
Liaise with Public Services and Procurement Canada's Contract Security Program and other government security authorities.
Work closely with project teams, field staff, subcontractors, and union partners to support security clearance requirements.
Monitor compliance with security clearance obligations and contract security requirements.
Directly support and provide guidance to Alternate Company Security Officers (ACSOs) across multiple offices.
Act as a resource for security-related inquiries and compliance requirements.
Maintain security records, reports, and documentation in accordance with company and government requirements.
Administrative & Corporate Support
Create internal communications, presentations, reports, and office notices.
Assist with office operations, vendor coordination, and workplace initiatives.
Maintain confidential files, records, and documentation.
Corporate Events & Employee Engagement
Support the planning and execution of company-wide events including town halls, holiday celebrations, employee appreciation initiatives, and major sponsored events.
Support and coordinate vendors, logistics, communications, registrations, and event materials.
Assist leadership in delivering initiatives that support employee engagement and company culture.
Must Haves
Active Government of Canada Secret Security Clearance.
Experience supporting security, compliance, administration, operations, or coordination functions.
Exceptional organizational and time management skills.
Strong written and verbal communication skills.
Ability to handle confidential and sensitive information with discretion.
Advanced proficiency with Microsoft Office Suite, including Outlook, Word, Excel, and PowerPoint.
Ability to work independently while managing multiple competing priorities.
Strong stakeholder management and relationship-building skills.
Nice to Haves
Experience working as a Company Security Officer (CSO) or Alternate Company Security Officer (ACSO).

Experience with the Contract Security Program (CSP).
Experience working in construction, engineering,…