Business

Office Administrative Assistant

Master Microsoft Office and accounting tools in just 25 weeks and get the hands-on training you need to thrive in any professional office setting.

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Type

Diploma

Duration

25 Weeks

Internship

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Program Outline

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About The Program

The Office Administrative Assistant diploma is designed for those who want to build a rewarding career at the heart of a business. Whether you’re launching your career or looking to sharpen your skills, this program prepares you to become a key contributor in any workplace with the confidence to take on a wide range of administrative responsibilities.

Students learn the ins and outs of widely used office software, including Microsoft Word, Excel, PowerPoint, Outlook, Sage 50, and QuickBooks, and gain foundational accounting skills that employers are actively looking for. With small class sizes, expert instruction, and a supportive learning environment, you’ll get the personalized guidance you need to develop both technical knowledge and practical skills.

Classes are held on campus in half-day formats, allowing you to balance your education with work, family, or other personal commitments.

Career Opportunities

As an Office Administrative Assistant graduate, you will qualify for positions such as:

Executive Assistant
Administrative Assistant
Office Coordinator
Office Administrator

Employers Who Have Hired triOS Grads

Toronto Board of Trade Marketing
ICS Courier Head Office
Walmart Canada
BMO Bank of Montreal
First Ontario Credit Union

Salary

$ 25

Average Wage/HR**

$ 37

High Wage/HR**

Source: workingincanada.gc.ca

NOC Code: 13110 - **Wage data based on NOC Code 13110 and rounded down to the nearest dollar. Average wage doesn't reflect the starting salary but represents the middle value between lowest to highest wages. Local (or regional) income may vary. Last updated December 2024.

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Program Details

Success in any workplace starts with organization, communication, and confidence and the 25-week Office Administrative Assistant Diploma at triOS College is designed to build all three.

You’ll begin with foundational training in digital literacy, career planning, and essential business communication skills that help you stand out in any office environment. As the program progresses, you’ll gain hands-on experience with Microsoft Office applications like Word, Excel, PowerPoint, and Outlook, developing the technical proficiency that today’s employers expect.

Accounting fundamentals are also a key focus. You’ll learn how to manage financial records, process transactions, and navigate professional accounting software through practical training in QuickBooks and Sage 50. This combination of software and accounting knowledge equips you to support bookkeeping, payroll, and financial reporting within a business setting.

In addition to technical skills, you’ll build confidence in customer service, client relations, and interpersonal communication. Courses in workplace diversity and professional etiquette prepare you to work effectively in inclusive environments and maintain strong, respectful relationships with colleagues and clients.

Throughout the program, triOS provides personalized career support—including resume coaching, LinkedIn development, and job search strategies—to help you make a smooth transition from training to employment. With small class sizes and guidance from experienced instructors, you’ll get the support you need to succeed.

Graduates of the program are prepared to pursue roles such as administrative assistant, office coordinator, receptionist, or executive assistant, or to take the next step toward office management. With employers across industries seeking skilled administrators, the opportunities are wide-ranging and growing.

Course Listings

Introduction to Accounting with Quickbooks

This course introduces basic accounting concepts and procedures. This course addresses double-entry accounting, analysis of source information, classes of transactions, and the accounting cycle. Using these critical concepts, accounting skills are applied and integrated to record transactions using proper procedures and forms in both a manual and computerized accounting system, QuickBooks.

Intermediate Accounting with Sage 50

This course continues the exploration of accounting procedures in payroll, petty cash, and bank reconciliations. Central to this course is the merchandising firm and its accounting cycle, appropriate valuation of inventory, and cost of goods sold calculations. This material will be applied in both a manual and computerized accounting system, Sage 50.

Business Communication

This course is designed to provide a basic understanding of communication skills in business environments. Focus will be placed on both written and spoken communications. You will review the basic writing process with emphasis on the mechanics of writing. You will also learn the importance of effective spoken communication, deliver an oral presentation, and participate in a mock meeting.

Client Relations

In this course, you will learn the fundamentals of how a strong relationship with clients is developed and maintained. Professionalism, the importance of living up to obligations, and the various forms of prompt and attentive communication are discussed. The course will also provide you with the skills you need to articulate organization image and how to identify and adapt to specific client behavior styles and how to measure and take corrective actions to provide client satisfaction and ensure positive relations. The course also introduces practical techniques needed to deal with clients that are angry and upset and explains the significance of maintaining and encouraging the loyalty of clients.

Career Planning and Preparation - Level 2

This module builds on concepts and skills introduced in the Career Planning and Preparation Level 1 module. In this subsequent module, you will update and refine your résumé and LinkedIn Profile. You will continue writing cover letters and learn the value of customizing cover letters to specific job postings. You will have the opportunity to apply this knowledge as you conduct a job search and write a cover letter tailored to an ideal job post. Through research, you will create a list of top employers and target current industry opportunities. You will learn about current methods for applying to job postings using technology. You will also gain an understanding of the job interview process, typical interview questions and possible responses, and expectations of both the interviewer and interviewee. In addition, you will engage in practical application of the interview process through role-play. Topics such as negotiating salary, self-management, and on-the-job success for placements and post-graduate employment will be also covered.

Digital Literacy for Professionals

This course introduces the fundamental concepts and principles of learning and working in a digital environment. This course will cover the following elements: using devices and handling information, creating and editing information, communicating and collaborating, and being safe and responsible online.

Diversity in the Workplace

This course introduces diversity and its strengths in the workplace. Among the topics covered are the strengths of diversity, its occasional challenges, how to manage diversity in the workplace, and the value of diversity training. Diversity in group dynamics is also addressed, with an emphasis on the strengths of a heterogeneous group and types of diversity.

Microsoft Excel

This Microsoft Office Excel course is created to help you build and validate the skills needed to succeed in today's economy. It will also provide you with the skills and knowledge you need to use Microsoft Office Excel effectively in all aspects of your personal and professional lives. Excel is the world's most popular spreadsheet software. Whether you are managing a household or running a small business, Excel will help you develop useful techniques to help business processes. This course is computer intensive and demands basic computer proficiency and a basic understanding of spreadsheet software. You are expected to make arrangements to meet proficiency needs as necessary.

Interpersonal Communication

Effective interpersonal communication is vital for the success of any organization. It impacts working relationships, productivity, and a variety of other business activities. This course introduces the concepts of effective interpersonal communication in the workplace, considering internal and external professional relationships. You will also will learn about telephone etiquette, which will prepare you to answer calls with confidence and professionalism, respond to customer/client inquiries effectively, and handle customer/client complaints. You will leave the course prepared to navigate the complexities of interpersonal communication with colleagues and clients.

Microsoft Outlook

This Microsoft Outlook course builds and validates the skills businesses need to succeed in today's information economy. It will also provide you with the skills and knowledge you need to use to effectively manage emails, contacts, calendars, and tasks. Outlook has become the corporate standard electronic personal organizer. These are the foundational skills needed to communicate using Outlook in a variety of positions within an organization. This course is computer intensive and demands basic computer proficiency and a basic understanding of email software. You are expected to make arrangements to meet proficiency needs.

Microsoft PowerPoint

This course will show you how to create and modify basic presentations by using Microsoft Office PowerPoint. You will explore the PowerPoint environment and create a presentation; you will format text on slides to enhance clarity and visual appeal; and you will also add and modify graphical objects in order to finalize and deliver a presentation. This course is computer intensive and demands basic computer proficiency and a basic understanding of PowerPoint software. You are expected to ensure you meet proficiency requirements for working in this environment.

Student Success Strategies

This course stresses the importance of developing non-technical skills to enhance personal, academic, and career success. The course will address strategies that are important for all adult learners, such as managing finances, maintaining health and wellness, understanding learning styles, setting goals, and honing practical study skills (such as memory, reading, and test-taking techniques). In addition, this course emphasizes strategies needed to succeed in your program, such as navigating technology efficiently, interacting and engaging with peers and facilitators/instructors, and managing learning time and space.

Microsoft Word

This Microsoft Office Word course is created for you to build and validate the skills businesses need to succeed in today's information economy. It also provides you with the skills and knowledge you need to use Microsoft Office Word effectively in all aspects of your personal and professional lives. Word is the world's most popular word processing software. Learning how to create, edit, format and print documents, enhance work with formatting, use bullets and numbering, add simple borders, tables, headers/footers, organizing data columns, and styles, are the foundational skills needed to perform in many positions. This course is computer intensive and demands basic computer proficiency and a basic understanding of word processing software. The course combines Theory/demonstration by an instructor with readings, trainings, projects, and a final exam for you to work on in a simulation-based environment. You are expected to ensure you meet proficiency requirements for working in this environment.

Admission Requirements

1. Student has an Ontario Secondary School Diploma or equivalent, OR is 18 years of age or older on or before the program begins AND can pass a qualifying test that has been approved by the Superintendent. *
2. The approved qualifying test for this program is the Wonderlic test. A passing score for this program is 14.

*Applicants from other Canadian provinces must be at least 19 years of age and a minimum of 1 year out of high school by the
program start date and successfully pass an academic achievement test.

International Students: Please contact us for more details regarding admissions requirements.

Career Quiz

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Success Stories

There are no words to describe the time I have spent at triOS. I will never forget my time there. The staff and students are so welcoming.

Chantell M.

Graduate