Every resignation in a large organisation carries a cost that rarely shows up in one line of the budget. Recruitment fees, onboarding time, lost client knowledge, and the dip in team output all add up, and they add up fastest when people leave in their first two years or just before stepping into leadership.
Diversity and inclusion training is one of the most practical levers employers have to change that pattern. When it is designed well, it changes how leaders run meetings, give feedback, allocate opportunities, and respond when someone is struggling. Those everyday behaviours shape whether people feel they belong, and belonging is one of the strongest predictors of whether they stay.
This article covers what the research says, what separates effective programs from tick-box sessions, three practical examples tied to leadership, engagement, and retention, and how Australia Post built inclusive leadership into its culture.
The retention case for inclusion
People in inclusive teams are three times less likely to leave their organisation, according to Diversity Council Australia’s Inclusion@Work Index 2025–2026, a nationally representative survey of Australian workers.
The cost side is just as clear. Gallup estimates that replacing one employee costs between half and two times their annual salary. In the same research, 52% of people who resigned said their manager or organisation could have prevented it.
The next question for large employers is which parts of their inclusion work shift these numbers. For most, the answer starts with the people leaders who hold those everyday conversations.
Example 1: Leadership behaviour
Leaders shape inclusion through small, repeated decisions. Deloitte’s research on the six signature traits of inclusive leadership describes people feeling included when they are treated fairly, valued for their differences, and given a voice in decisions. Training works best when it links each of those to something a leader can do.
Consider an operations manager responsible for 60 people across three shifts. Before training, overtime, acting-up opportunities, and development courses go to whoever asks first or is most visible. After a session on everyday bias, the manager sets up a simple rotation for stretch opportunities and checks who has missed out each quarter.
The practical shifts that training can build include:
- Allocating opportunities deliberately. Tracking who receives high-profile projects, acting roles, and training, and correcting imbalances early.
- Running fairer meetings. Inviting input from quieter team members, rotating who presents, and sharing agendas in advance.
- Interviewing consistently. Using structured questions and scoring criteria so hiring decisions rest on evidence, not familiarity.
- Responding well when someone raises a concern. Listening, acknowledging, and following up, which signals that speaking up is safe.
For employers, the link to retention is direct. When opportunities feel fair, fewer people conclude they need to leave to progress.
Example 2: Engagement and everyday team practices
Engagement drops quietly before people resign. Gallup found that 51% of people who left their job had not discussed their satisfaction or future with a manager in the three months before leaving. Inclusion training gives leaders the confidence and structure to have those conversations early.
Picture a customer service team where belonging scores in the engagement survey have slipped two quarters in a row. After training, the team leader introduces monthly stay conversations, asking what keeps each person in the role and what might make them leave. Patterns emerge quickly: rigid rosters are clashing with caring responsibilities, and newer team members feel left out of informal information sharing.
Small practice changes that follow from this kind of training include:
- Stay conversations held regularly, not only exit interviews after someone has decided to go.
- Flexible work discussed openly, so people can ask without worrying it will count against them.
- Recognition shared widely, so contributions from remote, part-time, and frontline staff are seen.
- Clear team norms for communication, so no one relies on being in the right room to stay informed.
Each of these costs little to introduce. They last when leaders have practised the conversations and understand how each one connects to retention.
Example 3: Retention at key career moments
Turnover in large organisations tends to cluster around a handful of predictable moments. Inclusion training helps leaders recognise those moments and respond in ways that keep people connected to the organisation.
Consider a senior analyst returning from 12 months of parental leave. Without a plan, a manager might assign lighter, lower-profile work with good intentions. A manager who has worked through this scenario in training asks what the analyst wants, agrees on hours and priorities, and keeps them in the running for the next promotion round.
Case study: How Australia Post built inclusive leadership at scale
Australia Post wanted practical, everyday inclusion in the hands of the people who shape culture most: its managers. With leaders working across both corporate and operational environments, a single generic workshop was never going to suit everyone. WORK180 designed and delivered a tailored inclusive leadership series to meet that challenge.
What the series involved
- Design. Every session was built around Australia Post’s own values and behaviours, with content shaped for both corporate and frontline leaders.
- Deliver. A hybrid roadshow across three sites reached leaders wherever they worked.
- Embed. Live, interactive sessions focused on how leader behaviour shapes culture, how to spot bias before it costs someone an opportunity, and how to support diverse teams. Leaders shared real-world examples with colleagues, turning ideas into actions they could use the next day.
What changed
Leaders reported significant growth in their confidence to support diverse teams and champion inclusive behaviours. The teams involved also recorded a 6% increase in the representation of women through recruitment, a measurable shift within a few months.
Participants valued the practical format. Australia Post’s Head of Business Performance and Insights described the session as valuable, noting that “practical, common and relatable examples allowed all attendees to connect, engage and contribute.”
“There’s a difference between ticking a box and building capability that changes how your leaders show up, in everything from a team meeting to an interview, every single day.”
– Louise Rogers, Global Diversity, Equity and Inclusion Advisor, WORK180
Lessons for other large employers
- Start with the managers who have the most day-to-day influence on culture.
- Tailor content to the different working environments across the organisation.
- Make sessions interactive, so leaders learn from peers facing similar situations.
- Track capability and representation data from the start, so results can be reported.
How to measure the impact
The strongest programs set a baseline before training and track the same measures at three, six, and 12 months. Attendance numbers show reach; the measures below show whether behaviour and retention have changed.
Comparing teams whose leaders completed training with those yet to start gives a clear picture of impact and helps build the case for the next phase.
Where to start
For large employers ready to move from good intentions to everyday practice, three steps set up a program for success:
- Review your turnover data to find the teams, career moments, and groups where people are leaving at higher rates.
- Identify the leaders with the most influence over those teams and prioritise them for training.
- Choose a partner who tailors the content to your values, working environments, and goals, and who reports on outcomes.
WORK180 designs and delivers inclusive leadership series for organisations of every size, from the first design session through to reporting. Whether you are already endorsed or just getting started, book a call to explore a series built for your organisation.
Sources
- Australia Post inclusive leadership case study, WORK180
- Inclusion@Work Index 2025–2026, Diversity Council Australia
- This fixable problem costs US businesses $1 trillion, Gallup
- Why diversity programs fail, Harvard Business Review
- The six signature traits of inclusive leadership, Deloitte Insights
