Understanding the Big Five personality assessment in the workplace

The Big Five personality assessment is the scientific gold standard for understanding human behaviour because it measures five universal traits – openness, conscientiousness, extraversion, agreeableness, and neuroticism – to predict how people interact and perform at work.

Key takeaways

• The Big Five model is the most academically validated framework for predicting workplace performance and team cohesion.
• Understanding these five core traits helps managers move beyond gut feel to make data-driven decisions about team design.
• Applying personality insights allows for more effective conflict resolution and tailored leadership approaches.
• Measuring organisational fit ensures new hires align with your company culture and specific role requirements.

The challenge of predicting human behaviour at work

We have all been there – hiring a candidate who looked perfect on paper, only to find they struggle to collaborate with the existing team after three months. It is a common frustration for People leaders. While CVs tell us what someone has done, they rarely reveal how that person will actually do the work or how they will react under pressure.

Traditional interviews often fall into the trap of bias and subjective 'vibes'. We tend to hire people who remind us of ourselves, rather than the person the team actually needs. This is where the Big Five personality assessment changes the game. By using a validated psychological framework, we can strip away the guesswork and look at the fundamental building blocks of an individual's personality.

At Compono, we believe that understanding these traits is the first step toward building a high-performing culture. When you know the natural tendencies of your people, you can stop trying to fit square pegs into round holes and start designing roles that let people play to their natural strengths.

What exactly is the Big Five personality assessment?

The Big Five – often referred to by the acronym OCEAN – is not just another 'buzzword' test. It is the result of decades of psychological research aimed at categorising human personality into five distinct, measurable dimensions. Unlike some popular models that sort people into rigid 'types', the Big Five recognises that personality exists on a spectrum.

The first trait, Openness, reflects a person's curiosity and willingness to try new things. In a workplace setting, high openness often translates to innovation and a love for creative problem-solving. This is followed by Conscientiousness, which is perhaps the strongest predictor of job performance. It measures how organised, dependable, and disciplined a person is. A highly conscientious employee is your go-to for meeting deadlines and ensuring accuracy.

Then we have Extraversion, which looks at where a person draws their energy. It is not just about being 'loud'; it is about how much social stimulation someone needs. Agreeableness follows, measuring a person's tendency to be compassionate and cooperative. Finally, Neuroticism (often framed as Emotional Stability in a business context) looks at how someone handles stress and emotional triggers.

How personality traits translate to work personality

While the academic theory is fascinating, what matters to you is how these traits show up in the office or on a Zoom call. At Compono, we have taken this research and simplified it into what we call work personality. This helps managers understand the specific work activities their teams are naturally motivated to focus on – and what they might accidentally ignore.

For example, someone who scores high in Agreeableness and Extraversion might naturally become The Helper. These individuals are the glue of your team, focusing on harmony and supporting others. On the other hand, someone with high Conscientiousness and a preference for order might be The Coordinator, ensuring that workflows remain efficient and deadlines are never missed.

By mapping these traits, you gain a 'weather map' of your team's dynamics. You can see where you have an abundance of big-picture thinkers and where you might be lacking the methodical detail-orientation needed to finish a project. This level of workforce intelligence is what separates average teams from those that consistently over-deliver.

Using the Big Five for smarter hiring and retention

The most expensive mistake a business can make is a bad hire. The cost is not just the salary – it is the lost productivity, the impact on team morale, and the time spent re-recruiting. Using a Big Five personality assessment during the recruitment phase allows you to assess for 'Organisation Fit' before an offer is even made.

Our platform, Compono Hire, uses these insights to help you assess candidates across three critical dimensions: skills, qualifications, and fit. By understanding a candidate's natural work preferences, you can determine if they will thrive in your specific environment or if the role's demands will lead to early burnout.

Retention is the other side of the coin. When employees feel that their natural strengths are being utilised, they are more engaged and less likely to look elsewhere. Using personality data, leaders can tailor their management style – providing more structure for those who crave it, or more autonomy for those who value independence. It is about creating an environment where people feel 'seen' and understood.

Adapting leadership styles through personality insights

Effective leadership is never one-size-fits-all. A style that motivates a visionary The Pioneer might completely overwhelm a methodical The Auditor. The Big Five provides the data you need to flex your leadership approach based on who you are talking to.

If you are leading a team with high neuroticism scores, your role involves providing psychological safety and clear, calming direction during times of change. Conversely, a team high in openness will grow restless without variety and the chance to experiment with new ideas. Leadership is less about who you are and more about how you adapt to the personalities in front of you.

We often see that conflict arises not from bad intentions, but from personality clashes. An The Evaluator who is focused on logic and risk might frustrate a The Campaigner who wants to sell a dream. When a leader understands these underlying traits, they can mediate conflict by translating each person's perspective into a language the other understands.

Key insights

Personality assessments provide a scientific foundation for understanding team dynamics beyond surface-level observations. By identifying natural work preferences, organisations can reduce hiring bias and significantly improve long-term employee retention. Effective leadership requires the ability to adapt communication and management styles based on the unique Big Five profiles of individual team members. High-performing teams are built through a deliberate balance of diverse personality types, ensuring all key work activities – from ideation to execution – are covered.

Where to from here?

Building a high-performing culture starts with understanding the people within it. By moving beyond intuition and using validated tools like the Big Five personality assessment, you can create a more inclusive, efficient, and engaged workplace.

• Explore: The Compono Platform
• Talk to an expert: Book in a 15-minute chat to see how personality data can transform your hiring and engagement.

Frequently asked questions

What is the most important trait in the Big Five for work?

While all traits matter, Conscientiousness is widely regarded as the most consistent predictor of job performance across different industries, as it relates to reliability and goal-setting.

How is the Big Five different from other personality tests?

Unlike models that pigeonhole people into 'types', the Big Five is based on empirical research and measures traits on a continuum, making it more accurate and reliable for professional use.

Can a person's Big Five traits change over time?

Personality is generally stable throughout adulthood, though people often show slight increases in Agreeableness and Conscientiousness as they mature through their careers.

How long does a Big Five assessment take?

Most modern assessments, including the ones used by Compono, are designed to be completed in just a few minutes while still providing deep, actionable insights.

Should I hire only based on personality scores?

No. Personality is one piece of the puzzle. It should be used alongside skills and experience to determine the overall fit for a specific role and company culture.