Start with the target role, then set a window

There is no single correct number of years, but a common recommendation is to cover roughly the last 10 to 15 years of relevant work history, which for many people means three to five positions. That span is usually enough to show where you started, how you grew, and what you do now without turning the document into a full career record.

The job posting helps you narrow the window. If an advertisement asks for five years of experience, your resume should go back at least that far, and roles inside the window that support your case should stay even if they are not the most recent.

Use a shorter history when you change fields

When you are moving into a new field, older roles from the previous field may add little to your case. A short resume focused on the last few years of relevant education, internships, and new-field work keeps the reader’s attention on the skills you are offering now, and you can use the freed-up space for projects, credentials, or awards.

Shortening the history is an editing choice, not a concealment strategy. Keep titles and dates honest for anything you list, apply the same reverse-chronological order, and be ready to discuss earlier jobs if an interviewer raises them. Omitting an irrelevant decade-old role is different from changing what a role was.

Handle roles older than 15 years deliberately

Experienced candidates rarely need to detail every early position. A role from more than 15 years ago can be dropped or compressed to a single line when it no longer reflects your current level, but keep it when it is directly relevant to the target job, contains a skill you still use, or shows unusually long tenure and commitment.

The common mistake is leaving old duties at full length and diluting the recent accomplishments a hiring manager most wants to see. Give the most space to your latest and most relevant work, keep the older entries brief, and reread the finished page to confirm the recent story is the one that stands out.

Sources consulted

This guide is an original synthesis of the following career guidance. Read the source material for its full context.