About The Firm
IN Development™
IN Development™
IN Development™
Helping executives grow with the demands, complexity, and opportunities of what comes next.
Helping executives grow with the demands, complexity, and opportunities of what comes next.
IN Development is a boutique Executive Coaching and Organizational Advisory firm founded by Mark Darren Gregor. Through the firm, Mark partners directly with senior leaders and organizations navigating growth, transition, and change.
Every engagement is designed around the leader, the organization, and the outcomes that matter most.
IN Development is a boutique Executive Coaching and Organizational Advisory firm founded by Mark Darren Gregor. Through the firm, Mark partners directly with senior leaders and organizations navigating growth, transition, and change.
Every engagement is designed around the leader, the organization, and the outcomes that matter most.
About Your Expert
Mark Darren Gregor
Mark Darren Gregor
Executive Coach | Strategic Advisor
Founder of IN Development™
Executive Coach | Strategic Advisor
Founder of IN Development™
Mark brings more than 25 years of leadership, coaching, and organizational experience to his work with executives and senior leaders.
Before founding IN Development, Mark led teams across 23 countries and held responsibility for organizations supporting approximately $500 million in revenue. That operating experience continues to shape how he works today: leadership development has to succeed in the reality of complex organizations, competing priorities, demanding stakeholders, and measurable business expectations.
As an ICF Professional Certified Coach, Mark has worked with leaders across industries including technology, healthcare, financial services, hospitality, and professional services.
Mark brings more than 25 years of leadership, coaching, and organizational experience to his work with executives and senior leaders.
Before founding IN Development, Mark led teams across 23 countries and held responsibility for organizations supporting approximately $500 million in revenue. That operating experience continues to shape how he works today: leadership development has to succeed in the reality of complex organizations, competing priorities, demanding stakeholders, and measurable business expectations.
As an ICF Professional Certified Coach, Mark has worked with leaders across industries including technology, healthcare, financial services, hospitality, and professional services.
"My objective is always the same: create measurable change that has lasting individual and organizational impact."
"My objective is always the same: create measurable change that has lasting individual and organizational impact."
Mark's unique combination of executive experience, formal professional training, and broad industry perspective shapes how he coaches and advises.
• ICF Professional Certified Coach (PCC)
• Master’s degree in Human Behavior from NYU
• DiSC, Hogan, MBTI, and Enneagram
• IBM Certified in AI Strategy & Leadership
• Experience leading teams across 23 countries
• Technology, healthcare, financial services, hospitality, and others
• Recognized as a Top 100 Best Global Coaching Leader
Mark's unique combination of executive experience, formal professional training, and broad industry perspective shapes how he coaches and advises.
• ICF Professional Certified Coach (PCC)
• Master’s degree in Human Behavior from NYU
• DiSC, Hogan, MBTI, and Enneagram
• IBM Certified in AI Strategy & Leadership
• Experience leading teams across 23 countries
• Technology, healthcare, financial services, hospitality, and others
• Recognized as a Top 100 Best Global Coaching Leader
About The Approach
The IN Development Approach
A practical, customized approach designed to turn insight into meaningful action.
A practical, customized approach designed to turn insight into meaningful action.
A practical, customized approach designed to turn insight
into meaningful action.
Rigorous
Expert assessment and candid conversation help uncover pathways to optimized outcome and leadership.
Practical
Insight is translated into concrete actions executives can apply in the real-world demands of their dynamic roles.
Customized
Every engagement is shaped around the leader, organization, context, and outcomes that matter most.
Grounded
The work is informed by firsthand experience leading across complex organizations, teams, and markets.
Next Step
Ready to elevate a critical leader?
Next Step
