Administrative assistant jobs in Mississauga, ON and nearby (315 jobs)

Administrative assistant jobs within 25 km of Mississauga, ON, Canada. Nearby towns and cities are included. Distances are straight-line, not driving distances.

Hiring at a glance

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Open jobs
315
Employers
194

Advertised starting pay

Average starting payCAD / hour
$27.75Across 44 listings
Average starting payCAD / year
$53,858Across 34 listings

Employer-advertised starting pay, not employee salaries. Currencies and pay periods stay separate.

Where work happens

Remote
0%0 listings
Hybrid
24%76 listings
On-site
76%239 listings

Employers hiring include University Health Network (24), Quantum Management Services Ltd. (12), Doane Grant Thornton LLP (6).

Sources & calculation notes

These figures describe the listings on this role page at the date shown, not the whole job market. Listings can change.

Employer-listed minimums from at least 10 listings per currency and pay period. These are advertised starting amounts, not employee salaries. Jobs without a minimum and unusual amounts are excluded.

Hybrid and on-site classifications may be inferred from descriptions. Check the original ad. How we count

About these jobs

Before you apply

Compare the office software, language skills and clerical experience requested in each ad. Job Bank lists secondary school and administrative training or previous clerical experience as typical requirements. Individual employers set their own criteria. Job Bank / Guichet-Emplois.

Guidance reviewed on September 16, 2026.

Based on the dated count above. Listings can change. How we count

Administrative assistant jobs in Mississauga, ON and nearby

Within 25 km

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  • Administrative Assistant II

    University Health Network

    Toronto, ON

    • Full-time

    The MEDICAL ADMINISTRATIVE ASSISTANT II exercises considerable judgment/independence and utilizes knowledge of medical terminology/moderately advanced functions to provide secretarial and…

  • Administrative Assistant (Fundraising)

    Quantum Management Services Ltd.

    Toronto, ON

    • $22 to $24 CAD / hour
    • Contract

    Position: Administrative Assistant (Fundraising)

  • Bilingual Administrative Assistant

    Experis Canada

    Mississauga, ON

    • Contract
  • Administrative Assistant

    Halton Healthcare

    Oakville, ON

    • Full-time

    Hours: Monday to Friday, 7.5 hour day shifts; 0830 - 1630 (Hours are subject to change based on operational needs)

  • Administrative Assistant II, Medical

    University Health Network

    Toronto, ON

    • Part-time

    The Administrative Assistant II exercises judgment and independence in the performance of administrative activities, the principal responsibilities include: utilizing knowledge of medical…

  • Administrative Assistant III

    University Health Network

    Toronto, ON

    • Full-time

    Administrative Assistant III will provide high-level administrative and secretarial support to the Clinical Director overseeing Emergency Department (ED), General Internal Medicine (GIM),…

  • Administrative Assistant

    Morguard

    Toronto, ON

    • Full-time

    The Administrative Assistant is accountable to the Manager or the Director of a function, department or office for ensuring that all daily administrative and other function-specific support…

  • Can Administrative Assistant II \ Underwriting Assistant

    Aon Corporation

    Burlington, ON

    • Full-time

    Must have strong computer skills and be proficient with the Microsoft Office Package

  • Administrative Assistant

    Lifemark Health Group

    Toronto, ON

    • $70,000 to $80,000 CAD / year
    • Full-time

    We are looking for an experienced Administrative Assistant to support our leadership team. This is a busy, hands on role for someone who is exceptionally organized, anticipates what needs…

  • Administrative Assistant

    Guardian Capital Group

    Toronto, ON

    • Full-time

    We are looking for an Administrative Assistant to provide administrative and strategic support to our Institutional Investment leaders at our head office in downtown Toronto. This role will…

  • Administrative Assistant - Slaight Centre Research

    CAMH

    Toronto, ON

    CAMH is currently seeking a full-time, contract (12 months) Administrative Assistant to provide senior administrative support across the Azrieli Adult Neurodevelopmental Centre and the…

  • Administrative Assistant

    Quantum Management Services Ltd.

    Toronto, ON

    • $28 CAD / hour
    • Contract

    Our government-based client in downtown Toronto is seeking an organized and detail-oriented Administrative Assistant to provide administrative support, coordinate daily office activities,…

  • Administrative Assistant

    CIBC

    Toronto, ON

    • Full-time

    You need to be legally eligible to work at the location(s) specified above and, where applicable, must have a valid work or study permit

  • Administrative Assistant

    Experis Canada

    Mississauga, ON

    • Contract

    Provide reception, mailroom, courier, administrative, and print center support while ensuring smooth day-to-day office operations.

  • Office administrative assistant

    Allingham Machining Inc.

    Brampton, ON

    • Full-time
  • Administrative Assistant (Fundraising)

    Quantum Management Services Ltd.

    Toronto, ON

    • $22 to $24 CAD / hour
    • Contract

    Position: Administrative Assistant (Fundraising)

  • office administrative assistant

    Allingham Machining Inc.

    Brampton, ON

    • Full-time
  • administrative assistant

    Sound Insurance

    Woodbridge, ON

    • Full-time
  • Senior Administrative Assistant

    Marsh

    Toronto, ON

    • Full-time

    All Marsh colleagues are expected to be in their local office or working onsite with clients at least three days per week

  • Administrative Assistant

    Plan Group Inc.

    Toronto, ON

    • Full-time

    Work to support administrative and clerical services for our team

  • Senior Administrative Assistant

    Marsh McLennan

    Toronto, ON

    • Full-time

    All Marsh colleagues are expected to be in their local office or working onsite with clients at least three days per week

  • Administrative Assistant

    Nestle Operational Services Worldwide SA

    Toronto, ON

    As an Administrative Assistant, you will provide comprehensive support to the BEO of Nestle Professional and Vice President, IT & Digital and their leadership teams. This position requires…

  • Administrative Assistant (Payroll)

    Altis

    Toronto, ON

    • $25 to $30 CAD / hour
    • Contract

    Our client is seeking a detail-oriented Administrative Assistant to provide essential reporting, data management, and administrative support to a busy payroll team. This is an excellent…

  • Administrative Assistant

    Deepak1.ca

    Toronto, ON

    • Full-time
  • Bilingual Administrative Assistant, MT Academy

    McCarthy Tétrault LLP

    Toronto, ON

    • Full-time

    We are recruiting for a Bilingual Administrative Assistant, MT Academy to join our team in our Toronto or Calgary office. The successful candidate must have a minimum of three years of…

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