Leadership begins within and ripples outward

The Dionne Group works with senior leaders and organizations navigating complexity and change - helping them bring clarity, courage and humanity to the moments that matter most.

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The Dionne Group partners with senior leaders and organizations navigating complex change, and growth - helping them lead with confidence, clarity and humanity.

Who We Serve

The Dionne Group exists to support leaders in this moment.

Through executive coaching, strategic consulting, and creative partnership, we help leaders strengthen the inner foundations that drive meaningful, sustained impact across teams, organizations, and communities.

Engagements range from individual coaching to team and organizational work.

Senior Executives & C-Suite Leaders

Leaders navigating complexity, visibility, and high-stakes decision-making - who want a trust thought partner to sharpen clarity, presence, and strategic impact.

Emerging & High Potential Leaders

Talented leaders preparing for thee next level - building confidence, influence and resiliencee as their scope and responsibilities grow.

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Leadership Teams & Organizations

Organizations seeking to strengthen leadership capability, alignmeent, and effectiveness-especially during periods of growth, transition, or change.
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Our Philisophy

Inner work for Outer Change

Our work is grounded in a simple but powerful belief:  humans are whole.  Leadership effectiveness emerges when internal clarity - values emotional intelligence, self-awareneness, and resilience - is aligned with exterrnal action - stratety, communication, decision-making, and influence.

How We Help

Our Services

Services include Executive Leadership Coaching, team and organizational consulting, leadershp development and facilitation, and advisory and strategic partnering.  

All servies center client needs,  focus on the growth and evolution of the individual(s) involved and target measurable results aligned to the business strategy.

Executive Leadership Coaching

A confidential, thought-provoking partnership for senior leaders navigating compexity, growth, or transition.  


Team & Organizational Consulting

Strategic consulting designed to strengthen leadership alignment, communication and effectiveness at the team or organizational level.  

Leadership Development & Facilitation

Thoughtfully designed and expertly facilitated leadership development experiences, including offsites, retreats, workshops and learning sessions - tailored to the context, goals and maturity of the leaders involved.
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Advisory & Strategic Partnerships

Ongoing advisory support for senior leaders who value having a trusted, experienced thought partner. Often complements coaching or consulting engagments, providing space for strategic thinking, reflection and decision support.

Testimonials

Trusted.  Impactful.  Partner.

Stories and reflections from people whose journeys have been shaped by working with Dionne.

“Working with The Dionne Group was a meaningful and impactful experience; the approach is thoughtful, pragmatic, and deeply grounded in helping leaders gain clarity and confidence during moments of complexity and change.

The teams bring a rare balance of insight, trust, and actionable guidance that creates lasting impact well beyond the engagement itself.”
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Antonio DaSilva
Recruiting Leader
Amazon Web Services

"My coaching experience has been a powerful catalyst for both my professional and personal development.

Through consistent guidance, honest reflection and practical tools, I've grown as an individual and as a leader.  The support and insight I received directly contributed to my leadership evolution and my career progression.

The invaluable practices I have learned bolster my ability to lead authentically and leverage both my professional and lived expertise to secure more just outcomes for my clients."

Paige Joki
Senior Attorney
Education Law Center-PA

"I have had the good fortune and pleasure to work with Tammi Teague as leader and  colleague.  
Partnering in these organizations (Financial, Aerospace and Defense), she displayed superior leadership and coaching skills delivering on large complex projects with broad organization impact.

Tammi gained enterprise-wide trust as she worked directly with the C-Suite leading corporate-wide Talent activities."
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Gail Hughes
Principal
PAI Consulting

"As a nonprofit leader in a continually evolving field, I deeply value the ways my leadership has been strengthened through executive coaching with Tammi Teague. I’ve had the opportunity to benefit from Tammi’s expertise through individual and team leadership engagements over several years.

She is seasoned, strategic, and thoughtful in her approach, and I would strongly recommend her services to other senior leaders."
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Brittany Fonteno
President & CEO
NAF

"Tammi is a natural leader who creates trust from the very first interaction. She listens intently and connects authentically with her audience, using relevant engaging stories to bring leadership concepts to life.
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Having delivered training to hundreds of leaders, she creates an environment where participants don’t just learn- they feel empowered to immediately practice and apply the tools in meaningful ways. Tammi consistently receives top-tier evaluations, with participants frequently noting the personal attention and care she brings to every engagement."

Vania Broderik Dursen
Head of Leadership Development,
Northrop Grumman

"Tammi played a pivotal role in the success of the Global ERG Summit at Silicon Valley Bank, bringing both depth of expertise and a masterful delivery.

She led our summit work on executive presence with precision, insight, and a commanding yet gracious gravitas that elevated the experience for all participants."




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Kusan Carr Foster
Global Inclusion Leader,
Medidata Solutions