Your First 90 Days in a New Engineering Job: A 30-60-90 Day Plan
A practical first 90 days plan for engineers: get safe on site, learn the plant, earn trust and pass your probation.
A practical first 90 days plan for engineers: get safe on site, learn the plant, earn trust and pass your probation.
Your first 90 days in a new job set the tone for everything after. For an engineer, that period is less about impressing people in meetings and more about getting safe on site, learning the plant or product properly, earning the trust of production and maintenance teams, and delivering a few solid results before your probation review. This guide lays out a practical 30-60-90 day plan adapted for engineering roles in Scottish manufacturing, food and drink, energy, process and construction.
It works whether you are a maintenance engineer starting on a new shift, a quality engineer joining a regulated site or a project engineer picking up live capital work.
A bit of preparation takes pressure off the first week.
The first month is about understanding how the site really works. Resist the urge to fix things you do not yet understand.
Take the induction seriously, even if you have done a dozen before. Every site has its own hazards, permit to work system, lockout and isolation procedures, confined space rules, hygiene standards and emergency arrangements. On a food and drink site, hygiene and allergen controls will be as important as mechanical safety. On a process or energy site, permits and isolations will govern almost everything you do.
Spend time where the work happens. Walk the lines or the site with operators and technicians, not just managers. Ask to see the drawings, P&IDs, electrical schematics or product specifications you will be working to.
Make a list of everyone you depend on and everyone who depends on you, then get time with each of them. For most engineers that means the production manager and shift leads, the maintenance team, quality, health and safety, stores and purchasing, and your own manager. Ask them the same simple question: what is the one thing that would make your job easier?
By the end of the first month, sit down with your manager and agree what they expect from you by day 90 and by the end of probation. Write it down. If the targets are vague, suggest specific ones.
You should now know enough to start adding value. The focus is on reliability: doing what you say you will do and building credibility with the people on the shop floor.
The relationship between engineering, production and maintenance can make or break a new starter. Production want uptime and output. Maintenance want time on the equipment and the right parts. Quality want compliance. As an engineer you are often in the middle.
Early wins should be visible, useful and low risk. Good examples:
Avoid big changes to how the site operates at this stage. You may still be missing context, and a failed change early on is hard to recover from.
By the third month you should be working with more independence and starting to shape how things are done in your area.
| Period | Focus | By the end you should have |
|---|---|---|
| Days 1 to 30 | Safety, learning, relationships | Completed induction, understood permits and isolations, walked the whole site, met key people, agreed 90-day goals in writing |
| Days 31 to 60 | Contribution and trust | Delivered one or two early wins, worked shifts alongside production and maintenance, built a list of improvement opportunities |
| Days 61 to 90 | Ownership | Taken ownership of an area, presented a data-backed improvement, reviewed progress with your manager ahead of probation |
Most engineering jobs start with a probation period. There is no legal requirement to have one and it can be any length, according to Acas; the length and conditions will be in your written statement. Check whether it can be extended and on what grounds, as some employers extend probation if they want more time to assess a new starter.
To pass probation with no drama:
If something is not working, such as the role being different from what was described, raise it calmly and early with your manager. Most issues are easier to fix at week four than week twenty.
If you are moving onto shifts for the first time, give yourself time to adjust. Understand how handovers work, how call-outs are managed and who covers what on nights and weekends. If you need a refresher on the patterns and allowances, our guide to shift patterns, overtime and allowances explains how they typically work.
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Split it into three stages. In the first 30 days, complete your site induction, learn the permit and isolation systems, walk the plant and meet the people you depend on. From day 31 to 60, deliver one or two low-risk early wins and build trust with production and maintenance. From day 61 to 90, take ownership of an area and bring data-backed improvements ahead of your probation review.
A 30-60-90 day plan is a simple outline of what you aim to learn and deliver in your first three months. For engineers it usually covers safety and site knowledge in month one, contribution and relationships in month two, and ownership and improvements in month three. Agreeing it with your manager early gives you both a clear view of what success looks like before probation.
It varies by employer. Acas notes that there is no legal requirement to have a probation period and that it can be any length. Some employers also reserve the right to extend it if they need more time to assess you, so check the terms. The length and conditions of your probation should be set out in the written statement your employer gives you on your first day.
Choose problems that are visible, useful and low risk. Examples include fixing a recurring fault operators have learned to live with, improving a planned maintenance schedule, updating an out-of-date procedure, closing overdue audit actions or unblocking a stalled spares order. Avoid large changes to how the site runs until you fully understand the context, as a failed change early on is hard to recover from.
Spend time on the shop floor and on shift, including nights where the site runs them. Explain what you are doing before it affects a running line, credit operators and technicians whose knowledge helped you, and follow through on every promise. Asking each team what would make their job easier is a simple way to find useful work and show you are on their side.
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