Seniority and Job Postings: How Does Internal Hiring Priority Work?

You have years of service under your belt. A posting goes up internally. You apply — and someone with less seniority gets the job. Is that normal? Is it even legal? The answer depends almost entirely on what is written in your collective agreement and how arbitrators interpret seniority priority clauses.

It is not always easy to untangle, but the basic rules are accessible to everyone. This article explains how internal hiring priority works, what "sufficient qualifications" typically means according to established arbitration principles, and what steps to take if you believe your seniority was overlooked during an internal competition.

What Is Seniority and Why Does It Matter So Much?

Seniority is the accumulated length of service a worker has with a given employer or within a bargaining unit. In plain terms: the longer you have worked there, the higher your seniority.

In the vast majority of collective agreements in Quebec — and across unionized workplaces in Canada — seniority serves as a central criterion for a range of important decisions:

• Layoffs: who gets laid off first when the workforce is reduced;
• Recall: who returns to work first once layoffs are reversed;
• Vacation selection: who gets first pick of vacation weeks;
• Promotions and transfers: who has priority when an internal job posting opens.

That last point — internal hiring priority — is where the most confusion and conflict tend to arise. Because seniority does not automatically hand the job to the most senior worker. There are conditions attached.

How Does an Internal Job Posting Process Work?

When a permanent position opens up or is created in a unionized workplace, the employer is typically required to post it internally before recruiting externally. This obligation comes directly from the collective agreement — it is not imposed by the Act Respecting Labour Standards (ARLS) itself, but it is a near-universal clause in Quebec collective agreements.

What a Typical Posting Includes

A job posting notice usually specifies:

The Application Deadline

The collective agreement almost always sets a specific deadline to apply — typically between 5 and 10 working days. Missing that window generally means forfeiting your right to participate in that competition. Read every posting carefully as soon as it appears.

The Two Main Models of Seniority Priority Clauses

Not all collective agreements work the same way. In practice, there are two dominant approaches:

1. Absolute Seniority ("Most Senior Qualified Worker Gets the Job")

Under this model, if the most senior candidate meets the required qualifications, they get the job — full stop. The employer cannot prefer a less senior worker simply because they seem "more talented" or "more promising."

A clause of this type is typically worded something like:

"When competing for a posted position, the qualified candidate with the greatest seniority shall be awarded the position."

2. Relative Seniority ("A Factor Among Others")

Here, seniority only becomes decisive when candidates are equally or substantially equally qualified. If a less senior worker is clearly more qualified, the employer may choose them. But if qualifications are comparable, seniority breaks the tie.

This type of clause might read:

"Where candidates are equally or substantially equally qualified, preference shall be given to the candidate with the greatest seniority."

Important: Which model applies in your workplace changes everything. Before concluding your rights were violated, confirm which type your collective agreement uses.

What Does "Sufficient Qualifications" Mean? Established Arbitration Principles

This is where most disputes are fought. The employer says the selected candidate was more qualified; you say you were equally qualified, if not more so. Who is right?

In grievance arbitration — the process by which a union challenges an employer's decision before a neutral third-party arbitrator — several principles are well established:

Employers Cannot Raise the Bar After the Fact

If the collective agreement refers to "required qualifications," the employer cannot invent additional requirements mid-competition to screen out senior candidates. Qualifications must reflect the actual duties of the job, not an idealized profile that happens to match a preferred candidate.

"Sufficient Qualifications" Does Not Mean "Best Candidate"

Under an absolute seniority model, the employer is not searching for the ideal hire — they are looking for someone capable of doing the work. Once the most senior candidate clears that threshold, the inquiry ends. Arbitrators consistently refuse to go further and compare who among qualified candidates would perform best.

The Ability to Learn Can Count

Take this scenario: your collective agreement states that candidates must have "the ability to perform the duties of the position." Arbitrators generally recognize that a worker does not need to master every task on day one — they need a reasonable capacity to learn those tasks within a reasonable timeframe. Seniority and experience built up with that employer can weigh in a worker's favour on this point.

Tests and Interviews Must Be Objective

If the employer uses a test or a structured interview grid to evaluate candidates, the criteria must be set in advance, applied uniformly to all candidates, and directly linked to the actual requirements of the position. A process designed — even subtly — to favour a particular candidate is a violation of workers' collective rights.

A Concrete Example

Consider the following situation: Sandra has worked in a distribution warehouse for 12 years as a receiving clerk. A shift supervisor position is posted internally. She applies. She has never held a supervisory title, but she knows the operation inside and out.

The employer instead selects Patrick, who has 4 years of seniority but previously worked as a team lead at a different company.

What does the collective agreement say? If the clause follows the absolute seniority model and Sandra meets the qualifications listed in the posting (for example, a high school diploma and warehouse experience), the employer must give her the position. Patrick's experience at a former employer is not relevant once Sandra satisfies the stated criteria.

If the clause follows the relative seniority model, the employer has more discretion — but they must still demonstrate that Patrick was materially more qualified, not just marginally so.

What to Do If You Believe Your Seniority Was Ignored

If you applied for a posted position and were passed over in favour of a less senior worker, here are the steps to follow:

Step 1: Request the Reasons in Writing

You have the right to know why you were not selected. Ask your employer — or your union delegate (the person in your workplace who represents unionized workers) — to provide a written explanation.

Step 2: Review Your Collective Agreement

Find the clause on job postings and transfers. Identify the seniority model (absolute or relative). Check the qualifications listed in the original posting and compare them against your experience and credentials.

Step 3: Talk to Your Union Delegate or Representative

Your union is your first line of support. Explain the situation: who was selected, what their seniority level is, and what qualifications they hold versus yours. Your delegate can formally request information from the employer — such as the selected candidate's application, test results, and the evaluation grid used.

Step 4: Watch Your Grievance Deadlines

A grievance is a formal complaint filed by the union (or sometimes by a worker directly) to challenge an employer's decision. Collective agreements include strict deadlines to file a grievance — often 15 to 30 calendar days after the event in question. Wait too long and you will lose your right to challenge.

Step 5: Gather Your Evidence

Keep copies of:

• The original job posting;
• Your application or proof of submission;
• Your seniority record or length-of-service document;
• Any emails or communications related to the competition.

Special Situations Worth Knowing

Management Positions Are Outside the Bargaining Unit

Supervisory and management roles are typically outside the bargaining unit. That means your collective agreement does not apply to those positions and the employer has full discretion in filling them. If you apply for an out-of-unit position, your seniority rights do not follow you there.

The Trial Period After a Promotion

Even if seniority secures you the position, collective agreements often include a trial period in the new role (separate from the initial probationary period at hiring). If things do not work out during that trial period, you generally return to your previous position — without losing your accumulated seniority.

Lateral Moves and Transfers

Seniority rules also apply to transfers — moving from one department to another, or from one shift to another. Check whether your collective agreement treats transfers the same way as promotions. It does not always.

Seniority During Restructuring or Mergers

When an employer merges two units or restructures departments, integrating seniority lists can become complicated. This is typically negotiated between the employer and the union, and outcomes vary widely from one workplace to another.

Conclusion: Your Seniority Is Worth Defending

Seniority represents invested time — loyalty, accumulated expertise, and often real personal sacrifices made over the years. In Quebec's and Canada's labour relations framework, it is a collectively bargained right that employers must respect.

But that right is not automatic or unlimited. It operates within the specific framework your collective agreement sets out. Knowing your job posting clause, understanding what "sufficient qualifications" means in your workplace, and knowing when and how to file a grievance — these are the tools that make the real difference.

Have a question about the job posting clause in your own collective agreement? Wondering whether your seniority should have come first in a recent internal competition? Ask Konvention directly — our tool reads your agreement and explains your rights in your specific context, in plain language.