We’re on a mission to help organizations build leadership pipelines that scale as fast as their business.
The Truth Is…
Managers make or break a workplace. Yet many managers are left to figure leadership out on their own – often at the cost of team performance, culture, and employee wellbeing.
At H.D. Impact, we’re committed to changing that. We partner with organizations to turn middle managers into confident leaders who boost engagement, cut turnover costs, and drive sustainable growth.
About Us
The Story Behind H.D. Impact
H.D. Impact was born out of a deep understanding of the challenges that unsupported middle managers face in corporate spaces.
When founder Hadi Diallo became a first-time manager — and later led teams of 20 and 40 — she received no leadership training or support. Like many, she was left to figure it out alone. She also watched leaders above her rise without ever learning how to lead, leaving teams with high turnover, low engagement, and poor performance.
But Hadi also saw the opposite: the power of a great manager. When she had one, she couldn’t wait to get to work. When she became one, she grew a high-performing team that surpassed goals, increased engagement, and saved the organization hundreds of thousands in rehiring costs.
That’s when she realized: poor leadership isn’t just a people problem, it’s a business challenge. And the right leadership development is the solution.
She founded H.D. Impact to help organizations address the root causes of disengagement and turnover by equipping managers with practical skills, results-driven training, and ongoing support.
Why "Impact"?
Because leadership is more than a title – it’s the ability to create lasting change. Our work isn’t just about career advancement; it’s about building a future where diverse leaders are empowered, organizations are stronger, and leadership excellence is accessible to all.
Client Success
“Working with Hadi transformed both my leadership and our organizations performance.
Through her coaching, I developed a more holistic approach to budget planning,
maximized my time alignment with priorities, and significantly improved my ability to
communicate our agency’s vision. The result? Revenue increased by $500K, staff
engagement soared, and my confidence with our Board grew dramatically. Hadi created
a safe space for honest feedback and leadership development while helping me
manage the stress of organizational change. I’d recommend her services to any
business leader seeking intentional, results-driven coaching."
-Nicola Memo, Executive Director, FSTV (Family Services Thames Valley)
Our Work is Rooted in Our Values
RESULTS
Every leader we develop strengthens the bottom line. From retention to productivity, our focus is on impact that drives performance today and safeguards tomorrow.
TRANSFORMATION
Leadership is about shifting mindsets, breaking barriers, and reshaping organizations to be more inclusive and high-performing.
EXCELLENCE
We set a high bar in everything we do, because great leadership doesn’t just shape teams, it shapes the future of the business.
GROWTH
We help leaders cultivate influence, build strong networks, and step fully into their roles with confidence.
Meet Our Founder
Hadi Diallo
Executive Coach | Leadership Strategist | Champion for Inclusive Leadership
Hadi is a seasoned executive coach and strategic advisor dedicated to helping leaders, teams, and organizations reach their full potential. With over 15 years in senior finance leadership, she has led major transformation initiatives, built high-performing teams, and driven culture change in complex corporate environments.
A trusted partner to senior leaders, Hadi is known for her empathetic yet results-driven approach, using accredited assessments, strategic tools, and coaching techniques to help leaders gain clarity, cultivate influence, and drive measurable success. She specializes in navigating leadership challenges with confidence, building inclusive cultures, and accelerating performance – without burnout.
Passionate about advancing diversity in leadership, Hadi actively mentors and sponsors BIPOC professionals, helping them break barriers and thrive. She has served on the Executive Committee of the CIBC Inclusion & Diversity Action Committee, shaping systemic change in corporate leadership.
Beyond her work with executives, Hadi is deeply committed to community service and nonprofit initiatives, ensuring her impact extends far beyond the boardroom.