Impact explores the people and culture teams need for sustained innovation and problem-solving. This transformative guide is aimed at leaders who have earned their roles through subject matter expertise, a capacity for impact, and innate leadership skills, and who now face the challenge of building innovative teams. This is the high-impact engineer turned manager, or the rising scientist turned lab director, or the founding startup executive. Subject matter proficiency and leadership intuition can initially take leaders far, but team performance ultimately hits a wall when leaders lack team-building expertise. Impact guides individuals across the leadership spectrum, from the new player/coach to the seasoned team builder, helping them sidestep common scaling pitfalls such as diminished team impact, lower productivity, culture dilution, disempowerment, and loss of focus. It presents a two-tiered framework that examines culture as a system and leadership as a discipline. The first tier offers team-wide practices to drive focus, cultivate alignment, and unlock collective brainpower and horsepower. The second tier provides individual-centered practices to ensure the team hires, promotes, and retains those most likely to contribute to the mission. Drawing from Keith V. Lucas’s direct experience in building teams and advising startups, Impacts offers practical insights for effective team building and leadership.