Executive Coaching, Reimagined for Elite Performance
Lead Beyond Limits
Welcome to Mosler Code
Executive Coaching & Advisory for:
CEOs, COOs, C-Suite Teams, Founders, Social-Impact and Nonprofit Leaders
Executive coaching is evolving; Mosler Code stands at the forefront:
​Mosler Code delivers next-level executive coaching and advisory grounded in decades of expansive lived leadership — accelerating decisive leadership movement and shaping cultures of trust that power enduring performance. ​
Mosler Code equips leaders to see clearly, decide boldly, and move decisively.​
Presence into Performance
Movement not Maintenance
Leadership that Outlives the Leader
Testimonials
JK
Global Head of Investor Relations
$150 Billion Private Markets Firm
Leading Private Markets Firm
“Over my 40-year career in financial services, I’ve worked with many Executive Coaches — John is unique. He sees straight into the strategic and human dynamics that drive high-stakes leadership and presses my thinking with precision, recalibrating how I approach the firm’s most complex decisions— sharpening a leadership lens that is deeper and more penetrating. When the path is clear, John is a great cheerleader of the approach and process. It is evident that he cares, and he holds me accountable to deliver.”
MR
Founder – MRoss LLC (Consulting)
(Former Chief of Staff - Executive Office, Verizon)
MRoss LLC (Consulting)
“Working with John has accelerated my growth in ways I couldn’t have expected. As a 34-year Verizon executive transitioning into consulting, I had the experience and drive — but I needed a new level of self-awareness, clarity, and disciplined structure for this next chapter. His ‘coaching + advisory’ style moved me from zero to momentum quickly, transforming conversations into contracts and direction into real revenue. His coaching blends intentional process with a rare depth of lived experience — elite athletics, Wall Street discipline, artistic mastery, and social impact — helping you see yourself and your possibilities differently. His commitment to my success is unyielding.”
SD
Senior Technical Advisor (C-Suite)
to the Executive Leadership
Nigerian National Oil Company
“Working with John has been genuinely transformative. His depth of experience, insightful guidance, and calm wisdom reshaped how I think, plan, and engage with my team. His questions and well-timed challenge helped me define and achieve purpose-driven goals — and every session leaves me more centered, focused, and intentional. “
KELLY K.
Chair of the Board — ADAPT Community Work (Formerly United Cerebral Palsy of New York City)
“After the unexpected passing of our CEO and Board Chair, stepping into the Chair role was a moment of deep responsibility. John quickly built trust with a calm, grounded presence and a deep understanding of nonprofit leadership. His questions pushed me to uncover my own insights — those ‘aha’ moments that changed how I lead. His guidance helped me navigate complex situations, lead our Board more effectively, and make a bigger impact on our mission. Working with John didn’t just help — it changed the way I lead.”