This letter provides a recommendation for Rookie Nelson. It describes how the author first met Rookie in 2013 during a leadership training course where Rookie stood out for his insightful comments. In 2014, after being promoted to Regional HSE Manager, Rookie was tasked with rebuilding a team with poor safety metrics. Over 18 months, Rookie assembled his team, gained their trust, and improved safety metrics in the region from the worst to the best in the company, setting a new safety record. The author recommends Rookie as one of the hardest working and most effective leaders due to his focus on results, understanding of people, leadership by example, and humility.