Oshawa, On Office Jobs – 103 Openings This Week

Executive Administrative Assistant
Ontario Power Generation —Oshawa, ON
- $57,000–$85,500 a year
- Contract
- Microsoft Powerpoint
- Microsoft Word
- Microsoft Excel
1d
Payroll Clerk
Ontario Power Generation —Oshawa, ON
- $33.09–$54.49 an hour
- Contract
- Microsoft Word
- Microsoft Excel
- High school diploma or GED
4d
Dental Admin/treatment coordinator
Confidential —Ajax, ON
- $24–$30 an hour
- Weekends as needed
- Medical office experience
- Administrative experience
- EMR systems
- Dental care
Quick apply
Experienced Dental Admin / Front Desk
Scougog - Port Perry —Port Perry, ON
- From $28 an hour
- Full-time
- EMR systems
- Computer skills
- Epic
- Dental care
- Paid time off
Quick apply
1d
Office Administrator / Dispatcher / Accounts Receivable
Tracey Refrigeration INC —Oshawa, ON
- $20–$26 an hour
- Full-time
- Administrative experience
- Accounting
- QuickBooks
- Dental care
- Vision care
Quick apply
Construction Site Clerk- Bowmanville/ Newcastle
Treasure Hill Homes —Bowmanville, ON
- From $55,000 a year
- Full-time
- Microsoft Word
- Microsoft Excel
- Microsoft Office
Quick apply
Front Desk Receptionist/Office Assistant
Zup's Fishing Resort and Canoe Outfitters —Ontario
- From $1,250 a week
- Full-time
- Hospitality
- CPR Certification
- Customer service
Quick apply
Accounting Clerk
vpi Employment Services —Bowmanville, ON
- From $20 an hour
- Full-time
- Accounting
- QuickBooks
- Accounting
Quick apply
13d
Human Resources & Labour Relations Generalist
TEAM GROUP OF COMPANIES —Oshawa, ON
- $80,000–$90,000 a year
- Full-time
- Microsoft Office
- Administrative experience
- Human resources
- Employee assistance program
Quick apply
Human Resources Generalist
Autolux Ltd Rapid City Transport —Pickering, ON
- $55,000–$70,000 a year
- Full-time
- Microsoft Office
- Bachelor's
- Human resources
- Designated paid holidays
Quick apply
4d
Accounts Payable Clerk
Adecco Canada —Ajax, ON
- $24–$27 an hour
- Temporary
- Microsoft Excel
- Microsoft Outlook
- Microsoft Office
- Dental care
Quick apply
9h
Executive Assistant to CEO
Bravura Architectural Products —Whitby, ON
- $60,000–$80,000 a year
- Full-time
- AutoCAD
- Construction
- Business
- Dental care
- Paid time off
Quick apply
1d
Unit Clerk (Madoc)
Clare McFaul LTC (Centre Hastings) LP. —Ontario
- $23.44–$27.69 an hour
- Part-time
- Administrative experience
- High school diploma or GED
- Business
Quick apply
Admin Assistant/Receptionist
MT Talent Solutions Inc. —Whitby, ON
- $45,000 a year
- Full-time
- Microsoft Powerpoint
- Microsoft Word
- Microsoft Excel
Quick apply
Senior Accountant CPA - Family Office Clients Exp.
PeopleFind,Inc. —Ontario
- $90,000–$130,000 a year
- Call to connect
- Accounting
- QuickBooks
- Communication skills
Quick apply
Unit Clerk (Orillia)
Arcavia (Orillia) LTC LP —Ontario
- $45,000–$57,000 a year
- Full-time
- Administrative experience
- High school diploma or GED
- Business
- Dental care
Quick apply
12d
Full-Time Dental Receptionist/assistant
Courtice Dental Office —Courtice, ON
- $20–$27 an hour
- Full-time
- Medical office experience
- Administrative experience
- Front desk
- Dental care
Quick apply
Administrative Assistant, Sales
Medavie —Ontario
- $46,292–$52,078 a year
- Full-time
- Microsoft Office
- Administrative experience
- No university degree
- Dental care
Regional Timber Supply & Inventory Planner & Scheduler
Stella-Jones Inc. —Ontario
- $73,000–$91,000 a year
- Full-time
- Up to 50% travel
- Administrative experience
- Analysis skills
- Disability insurance
- Dental care
Real Estate Law Clerk/ Platform Operator (Ontario)
InfoTrack Canada —Ontario
- $50,000–$55,000 a year
- Full-time
- Remote
- Bilingual
- Microsoft Excel
- English
- Dental care
- Paid time off
Quick apply

I want to receive the latest job alerts for office in oshawa, on

By signing in to your account, you agree to SimplyHired's Terms of Service and consent to our Cookie and Privacy Policy.

Explore jobs in more locations

office jobs near oshawa, on

Front Desk Receptionist jobs in Ontario

Human Resources Generalist jobs in Oshawa, ON

Payroll Clerk jobs in Oshawa, ON

Human Resources Generalist jobs in Pickering, ON

Law Clerk jobs in Ontario

Treatment Coordinator jobs in Ajax, ON

Unit Clerk jobs in Ontario

Dental Receptionist jobs in Courtice, ON

Accounting Clerk jobs in Bowmanville, ON

Administrative Assistant jobs in Whitby, ON

Senior Accountant jobs in Ontario

Administrative Assistant jobs in Ontario

Front Desk Receptionist jobs in Metro Vancouver Regional District, BC

Clinic Receptionist jobs in Ottawa, ON

Studio Yoga, Pilates, Wellness Receptionist jobs in Montréal, QC

Front Desk Receptionist jobs in Winnipeg, MB

Receptionist jobs in Regina, SK

Front Desk Receptionist jobs in Cochrane, AB

Gym Receptionist jobs in Vancouver, BC

Front Desk Receptionist jobs in Terrebonne, QC

Executive Administrative Assistant

Ontario Power Generation -
Oshawa, ON

Apply Now

Job details

Contract | Fixed term contract
$57,000–$85,500 a year
1 day ago

Qualifications

Microsoft Powerpoint
Microsoft Word
Microsoft Excel
Microsoft Outlook
Post-secondary education
Administrative experience
Business development
Communications
Proofreading
Business
Communication skills

Full job description

Location: Oshawa, ON, CA, L1H 4P7

Req ID: 57386

Status: Contract (up to 24 months)

Working Conditions: On-site

Education Level: Post secondary diploma/degree in Business Administration, Communications, or a related field preferred

Base Location: Oshawa, ON

Shifts(s): Days

Travel: 10%

Deadline to Apply: July 13, 2026

Salary Range: $57,000.00 - $85,500.00 Per Year

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 Senior Executive Administrative Assistant.

Reporting to the SVP Nuclear Sustainability Strategies, this position is responsible to provide comprehensive executive support—including travel coordination, expense management, calendar oversight, meeting documentation, and stakeholder relations—to senior Hydro business development leaders, leveraging advanced administrative skills and professionalism.

KEY ACCOUNTABILITIES

Prepare, submit, and track detailed expense reports primarily through Concur, ensuring accuracy, timely processing, and strict adherence to company policies.
Proactively manage multiple executives’ calendars, including scheduling meetings across time zones, resolving conflicts, and collaborating with other administrative staff to ensure alignment and availability.
Organize, attend, and document key meetings by preparing agendas, taking accurate minutes, tracking action items, and distributing follow-ups as required.
Draft, proofread, and format correspondence, reports, and presentations using Microsoft Word, Excel, and PowerPoint; ensure all documents meet corporate standards.
Build and maintain strong working relationships with internal and external stakeholders, acting as a professional representative for the executive team and facilitating smooth communication.
Maintain efficient office systems, suggest improvements to administrative processes, and support the smooth operation of the business development group.
Handle sensitive information with discretion and maintain a high level of professionalism in all interactions, leveraging 7–10 years of executive support experience to anticipate needs and resolve issues proactively.

QUALIFICATIONS

Post secondary diploma/degree in Business Administration, Communications, or a related field preferred.
Over 7 years experience working with managing calendars, processing expense reports coordinate and book complex travel arrangements (flights, hotels, transportation) for senior managers and directors.
Proven expertise in coordinating complex travel arrangements and managing expense reports, with strong proficiency in Concur or similar systems.
Advanced skills in calendar management, meeting scheduling, and collaboration tools such as Microsoft Outlook, Teams, and Office Suite (Word, Excel, PowerPoint).
Exceptional written and verbal communication skills, with experience drafting, proofreading, and formatting professional documents and correspondence.
Strong relationship-building and interpersonal skills, demonstrating professionalism and discretion when interacting with stakeholders at all levels.
Highly organized with a proactive approach to office management, process improvement, and the ability to maintain confidentiality in handling sensitive information.

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 and the United States, 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.

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.

Apply Now

Refine Your Search

office jobs in oshawa, on

Executive Administrative Assistant

Payroll Clerk

Dental Admin/treatment coordinator

Experienced Dental Admin / Front Desk

Office Administrator / Dispatcher / Accounts Receivable

Construction Site Clerk- Bowmanville/ Newcastle

Front Desk Receptionist/Office Assistant

Accounting Clerk

Human Resources & Labour Relations Generalist

Human Resources Generalist

Accounts Payable Clerk

Executive Assistant to CEO

Unit Clerk (Madoc)

Admin Assistant/Receptionist

Senior Accountant CPA - Family Office Clients Exp.

Unit Clerk (Orillia)

Full-Time Dental Receptionist/assistant

Administrative Assistant, Sales

Regional Timber Supply & Inventory Planner & Scheduler

Real Estate Law Clerk/ Platform Operator (Ontario)

I want to receive the latest job alerts for office in oshawa, on

Related Searches

Explore jobs in more locations

Job seeker tools

Employer Tools

Browse

Stay Connected