Position: Senior Administrative Assistant

Location: Toronto

Salary: $70,000-$85,000

Posting Type: Open vacancy

Work model: Hybrid, with in-office attendance Tuesday through Thursday

Our client is seeking an experienced and highly proactive Senior Administrative Assistant to support a busy senior leader and the broader leadership team while helping to keep the day-to-day operations of the office running smoothly.

This is an excellent opportunity for a confident administrative professional who enjoys taking ownership, anticipating needs and keeping a fast-moving team organized. The successful candidate will be comfortable working independently, managing competing priorities and supporting leaders who are frequently working outside the office.

Responsibilities

Provide day-to-day administrative support to a senior leader and members of the leadership team

Coordinate calendars, meetings, travel arrangements and related logistics

Prepare, reconcile and submit expense reports

Assist with reports, presentations, communications and other business documents

Compile and organize information using Excel and other Microsoft Office applicationsCoordinate office activities, deliveries, requests and other operational details to ensure the office runs smoothly

Liaise with internal teams, vendors and other contacts as required





Follow up on outstanding items and help ensure deadlines and commitments are met

Qualifications

Several years of progressive administrative support experience, ideally within a project-based, professional services or corporate environment

Strong proficiency with Microsoft Office, particularly Excel, Word, PowerPoint and Outlook

Experience coordinating travel, expenses, meetings and business reporting

Sound judgment and confidence working with senior leaders

Resourceful, adaptable and comfortable working with limited direction

Receptive to constructive feedback and committed to producing high‑quality work

The Ideal Candidate
You are an experienced, polished and self‑directed administrative skilled who does not wait to be told what needs attention. You quickly learn how a team and office operate, anticipate next steps and confidently take ownership of your responsibilities. You are comfortable supporting a smart, direct and fast‑paced leader and can adapt quickly as priorities change.

All applications are reviewed by our recruitment team, and hiring decisions are made by people. We may also use AI‑enabled tools to support parts of the application review process.

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📌 Senior Administrative Assistant (Ontario)
🏢 Quantum Management Services
📍 Ontario