Retired U.S Navy Captain transformed one of the lowest-ranked U.S submarine crews into the best in the fleet.
His book on his leadership strategies has gone on to inspire thousands of people about how they too can improve their leadership skills.
It's not just relevant in the workplace, as the skills can translate across into your home and family life too.
David's bite-sized chunks of advice 'Leadership Nudges' can be found on YouTube.
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