Office Administration Manager

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At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world's most complex challenges and build legacies for future generations.

There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

AECOM is seeking an experienced and highly organized Office Administration Manager to oversee daily office operations and ensure the smooth running of administrative functions in either our Markham or Mississauga, ON locations. This role is responsible for managing office resources, supervising administrative staff, and providing operational support to leadership and employees. The ideal candidate is proactive, detail-oriented, and thrives in a fast-paced environment.

The responsibilities of this position include, but are not limited to:

Office Operations & Administration

• Oversee day-to-day office operations to maintain a productive and professional work environment.
• Manage office supplies, equipment, and vendor relationships.
• Ensure compliance with health, safety, and security regulations.
• Point of contact for office equipment, boardroom technology and supplies needed on a day-to-day basis.
• Works with the Regional Facilities Manager to perform regular facilities management for the office.
• Coordinates with IT on the latest updates and enhancements. Provides local assistance with trouble shooting as required
• Responsible for the Managing of Reception personnel, and providing back up support as required.
• Office event coordination

Staff & Team Support

• Supervise administrative and support staff, providing training and performance management.
• Act as the main point of contact for staff requests related to office operations.
• Support leaders and departments with scheduling, logistics, and documentation.
• Coordinates local on-boarding for  new hires.

Communication & Records Management

• Draft and distribute internal communications and announcements.
• Maintain accurate office records and Records Management system (digital and physical).
• Support HR with onboarding documentation and administrative compliance.

Leadership & Strategic Support

• Identify and implement process improvements to enhance efficiency.
• Partner with leadership and other departments on organizational initiatives and special projects.
• Represent the office with professionalism when liaising with external stakeholders.

Minimum requirements: 

• Post-secondary education in Business Administration, Office Management, or related field + 4 years of experience in office administration, with at least 2 years in a supervisory or management role or demonstrated equivalency of experience and/or education
• Strong knowledge of office procedures, budgeting, and vendor management.
• Excellent organizational, multitasking, and problem-solving skills.
• Strong written and verbal communication abilities.
• Proficiency in MS Office Suite (Word, Excel, Outlook, PowerPoint) and familiarity with office management software.
• Ability to maintain confidentiality and always demonstrate professionalism.

Preferred qualifications: 

• 5+ years of experience in office administration, with at least 2 years in a supervisory or management role
• Strong leadership and team management skills
• Attention to detail and high level of accuracy.
• Ability to work independently and prioritize competing demands.
• Strong interpersonal skills with a customer-service mindset.
• Adaptability and resilience in a dynamic workplace.

• Please indicate your preferred location in your application - Markham or Mississauga as we have a position available in either office
• Relocation is not available for this position.
• Sponsorship for Canadian employment authorization is not available for this position.

About AECOM 

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan. 

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients' complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2024. Learn more at  

What makes AECOM a great place to work 

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you'll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you've always envisioned. Here, you'll find a welcoming workplace built on respect, collaboration and community - where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines.