
On your first day at a new job, you’re overloaded with information, from login details and colleagues’ names to where the toilets are.
But beyond the practical stuff, you also need to be aware of how you’re coming across as you take everything in — because this can stick with you long past the probation period.
Sarah Murphy, learning partner of people and leadership development at Personio, tells Metro that poor first impressions may make colleagues hesitant around you.
This then has the potential to ‘slow down onboarding, reduce trust, and even contribute to feelings of loneliness’.
There are a few mistakes people make time and time again here, but thankfully, they’re easy enough to avoid.
So with a little awareness and preparation, your only worry will be who to choose as a new work bestie.

Not building connections early
‘Too many people focus on the overly technical side of their role and forget that building relationships with their new colleagues is just as important,’ says Sarah.
Sometimes, it’s a case of shyness, but while the HR expert notes it’s ‘natural to be nervous,’ she explains: ‘Avoiding conversation or waiting for others to approach can leave a new employee feeling isolated, or signal to others that they’re disengaged.’
As scary as it may seem and however much you want to get going with the work, try to reach out to co-workers early on. It doesn’t need to be anything major either — making conversation over coffee or saying hi on Slack can make a huge difference.
Misinterpreting the dress code
The term ‘smart casual’ covers a wide spectrum, so it’s vital to get a clear picture of what that means for your new workplace. If not, you could end up standing out like a sore thumb.
‘Psychologically, people want to fit in, and they often default to what feels comfortable to them,’ says Dr George Sik, psychologist and director of workplace consultancy, eras. ‘But dressing too casually can signal that you don’t fully “get” the company culture.’
Similarly, Dr Sik notes that ‘walking in a full suit when everyone else is in smart shirts and trousers can make you look like you don’t belong’ which may ‘make colleagues feel uncomfortable and create an instant social divide.’

To steer clear of fashion faux pas, he recommends asking the hiring manager before you start, or better yet, checking the company’s LinkedIn and look at what people in similar roles are wearing.
‘Dressing in line with your peers shows a level of social awareness that’s highly valued in any workplace,’ Dr Sik adds.
It may also be best to stick to items you’ve already worn in, as Julian Nelson, dress code expert and founder of A Fine Pair of Shoes, explains: ‘The best first-day clothes are ones you know you can rely on to let you move confidently. Nothing undermines a first impression like fidgeting with a stiff collar or limping because of blisters.’
Trying too hard
‘New hires sometimes overwhelm themselves by rushing to prove themselves instead of taking the time to listen, learn, and observe the team culture,’ says Sarah.
‘As much as they want to impress, they can often fall into the trap of trying to prove too much, too fast.’
In her view, showing curiosity and openness create ‘the foundation of lasting workplace friendships’ and ‘not only helps you settle in faster but also signals to others that you’re approachable and collaborative.’
Sarah recommends being proactive in this respect by asking questions, adding: ‘Those early friendships can ease those first-week nerves and set the stage for long-term success in the role.’
Do you have a story to share?
Get in touch by emailing MetroLifestyleTeam@Metro.co.uk.