About Us
Our Story
Our consulting firm has grown from Tamara’s deep belief that people can be happy at work, and with the right leadership, people will come to work excited and eager to collaborate. At TNT Development, we are on a mission to empower organizations to become thriving workplaces where leaders inspire with empathy, integrity, and vision.
TNT Development
Leading in the 21st century is about cultivating collaboration, trust, and a shared purpose. By equipping leaders with essential skills, we help them build inclusive, equitable cultures where people feel valued, heard, and motivated to give their best.
We partner with organizations committed to investing in their people, nurturing health, well-being, and continuous growth. Together, we drive change that transforms organizational cultures - creating environments where employees feel safe, excited about their work, and driven to grow.
Our Team of Believers and Optimists
Tamara Thorpe, MA
Owner and Managing Principal Consultant
Tamara Thorpe, known globally as "The Millennials Mentor," is a renowned thought leader in next-generation leadership, celebrated for championing Millennial and Gen Z talent. She has built a reputation for her expertise in guiding young professionals to step confidently into leadership roles and helping organizations harness the potential of their multigenerational teams. Tamara has dedicated her career to empowering emerging leaders and fostering dynamic, high-performing workplaces. Her dedication to advancing leadership development and strategic insight makes her a sought-after consultant in leadership and organizational development worldwide.
An expert in leadership, mentoring and culture change, Tamara is known for her unique ability to connect leaders with future leaders, building cultures of engagement and innovation. With over two decades of global consulting experience, Tamara has guided organizations from start-ups to $30B enterprises in transforming subject matter experts into impactful leaders.
Tamara’s comprehensive approach blends strategic insight with empathy, and includes designing customized leadership programs and advising on mentorship frameworks that nurture talent, encourage collaboration, and drive change.
Jeffrey Cookson, GPHR, SPHR, MFA
Master Facilitator and Executive Coach
With 30 years of experience in leadership development and organizational growth, Jeffrey is a seasoned consultant specializing in diversity, equity, inclusion, and belonging (DEIB) as well as unconscious bias mitigation. He is dedicated to fostering inclusive cultures through expert coaching, facilitation, and consulting, helping individuals and organizations navigate and address complex, sometimes controversial topics with confidence and empathy.
A skilled designer of leadership programs, Jeffrey has crafted impactful, instructor-led, virtual, and blended training solutions, complemented by facilitator guides, participant workbooks, and tailored presentation materials. Known for his ability to simplify intricate issues, Jeffrey has developed comprehensive train-the-trainer programs to empower leaders and teams across a range of industries.
Since 2006, Jeffrey has been a qualified Intercultural Development Inventory (IDI) Administrator, conducting hundreds of individual and group debriefs worldwide. With a track record of over 10,000 facilitation hours and more than 3,500 sessions reaching tens of thousands of participants in 50+ countries, Jeffrey has presented at nine national U.S. conferences, 22 international conferences, and over 30 regional and local conferences—earning a reputation as a trusted partner in transformative leadership development.
Celestina Garcia, M.Ed., ICF
Facilitator and Executive Coach
Celestina is an experienced leadership coach and consultant, dedicated to helping individuals and organizations reach peak performance. With a background in corporate leadership, entrepreneurship, and coaching, she combines strategic insight with empathy to empower leaders to unlock their full potential. Her approach is tailored to each client, with a focus on resilience, growth, and actionable results.
Celestina’s expertise spans Fortune 500 companies, emerging leaders, and entrepreneurs, guiding them through complex challenges and dynamic business landscapes. She is certified in multiple coaching methodologies, enabling her to deliver impactful sessions that build confidence, clarity, and lasting change.
Passionate about diversity and inclusion, Celestina is committed to creating workplaces where every voice is heard and valued. She believes that leadership flourishes in inclusive spaces and works with her clients to foster accountability, innovation, and cultural awareness. With her collaborative, results-driven approach, Celestina has earned a reputation as a trusted partner for leaders seeking to elevate their impact and drive sustainable growth.
Dr. Sarah Nodarse, PhD
Principal Consultant and Facilitator
Dr. Nodarse is an organizational culture strategist who helps organizations become resilient through cultural intelligence.
Over two decades as a trusted advisor to large, multinational organizations, Dr. Nodarse has built effective employee listening strategies, trained managers and leaders in core people skills, and helped executives build the talent management systems and collaborative mindsets they need to achieve their strategic objectives.
With a background in cultural anthropology (specialized in organizational culture) and over a decade of experience living and working in Europe, Dr. Nodarse debuted her consulting career on the Employee Experience team at Willis Towers Watson (formerly Towers Perrin – ISR) in both the Paris and Chicago offices. She subsequently expanded her subject matter expertise in talent management and her consulting and facilitation skills at The Zone Global and Language & Culture Worldwide in Chicago.
Driving her work today is the belief in the power of culture to help organizations reach their full potential and solve the world’s most pressing problems. Her core mission is to build cultural intelligence or CQ, the core people competency that drives organizational success. CQ empowers leaders to lead authentically, inspiring their teams to align to common goals, work better together, leverage their unique strengths, and grow through conflict.
