First, I would gently challenge the word "train." Most companies default to a one-off AI tools workshop, tick a box, and wonder why nothing changes. Managers do not need to be trained on prompts; they need to be developed as leaders of work that is now part human, part machine.
That is a different and more demanding task. The starting point should be self-awareness, not tools. A manager who does not understand their own decision-making style, biases, and behaviour under pressure will simply automate their blind spots faster. Employees also do not trust AI because of the technology itself. They trust the leaders introducing it.
Practically, manager development should focus on three areas. The first is fluency: hands-on exposure so managers actually use AI on real work and lose their fear of it. The second is judgment: learning when to trust AI output, when to challenge it, and how to remain accountable for decisions it informs. The third is human leadership: coaching, giving meaningful feedback, having difficult conversations, and protecting psychological safety as roles evolve.
Those capabilities are also what build trust. Managers need to communicate openly about why AI is being introduced, what it will and will not do, and how it affects
people's roles. Employees should help shape how AI is used, understand how important AI-assisted decisions are made, and know there is always human accountability.
AI can scale existing bias as easily as it scales efficiency, making transparency and explainability essential. AI changes daily work, but it also increases the need for managers who can lead people through uncertainty with honesty, consistency, and sound judgment. This development should be continuous rather than a single event, using short, applied learning and peer discussions based on real situations. People remember what they practise, not what they are told, and they trust what leaders consistently demonstrate rather than what they announce.