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Real · Resounding · Results

We shift how leaders see and operate — delivering lasting change for unprecedented performance and long-term value.

We begin by transforming the way people communicate.

Fig. 01Two voices, one resonance
Their communication is like surgery — they listen really well and understand the source of the problem. — Client
Gets to the heart of the matter very quickly. — Client
REAL · RESOUNDING · RESULTS

Elevated Performance & Profitability. Fully Engaged Teams. Embedded Accountability, Integrity & Workability. Team Retention.

NoiseSignal
It’s not what you say. It’s what they hear.
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Elevated Performance & Profitability

See why
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When your people operate at full capacity, revenue and margins follow. Performance becomes the byproduct, not the target.

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Fully Engaged Teams

See why
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People who care about the outcome stay later, push harder, and bring others with them. Engagement compounds.

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Embedded Accountability, Integrity & Workability

See why
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Trust becomes the operating system. Conversations happen earlier. Problems get solved faster. Standards lift everywhere.

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Team Retention

See why
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Talent stays where they're growing. You stop training your competition.

They're as committed, or even more committed, than you are — to what you want to accomplish. — Client

We begin by transforming the way people communicate.

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Consulting

Uncover what's getting in the way of your unique business goals.

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Coaching

Enhance performance through coaching that addresses your blind spots and leaves you powerfully in action.

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Training

Fully customizable, world-class training in leadership, sales and communication.

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Programs & engagements tailored to your goals.

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Leadership Development

Build leaders who create clarity, ownership, and momentum across every level of the organization.

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Business Succession Planning

Design and execute a transition that protects value, people, and legacy for the long term.

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Sales Training

Equip teams to listen for what matters and turn conversations into committed, resounding results.

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Productivity Training

Turn scattered effort into focused, accountable action that consistently moves the needle.

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Executive & Leadership Coaching

One-on-one coaching that surfaces blind spots and leaves leaders powerfully in action.

Where to begin?

Let's find the right fit for you.

Book a conversation →
"
Most will try to guess what you are saying, waiting to talk — they don't do that. They listen for your experience, not for information. — Client Experience
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Theresa Jabbour & Mike Mahannah
Founder & Senior Partner

Resonance Consulting delivers transformational results that matter most within organizations. We are passionate about what people produce when they are being powerful and effective — and we value taking leaders on in a real and unique way.

We partner with executives and leadership teams to break through their communication and performance barriers, causing their organizations to really win — big time. Our promise is extraordinary value that exceeds expectations and lasts a lifetime.

The Science of Performance.

DETERMINE DELIVER MANAGE ENGAGE
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Step 1

We start all client engagements by determining the specific tangible and cultural business results that you would like to achieve.

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Step 2

We engage with the key players and listen for the blind spots and critical leverage points that will produce breakthrough performance in the company.

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Step 3

When situations allow for it, we consult, coach and lead workshops in live sessions. When this is not possible, we deliver our work via zoom or telephone.

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Step 4

We manage the engagement and constantly monitor to ensure that you are on track to achieve your desired results.

I rate their listening as exceptional — based on the feedback and responses they give. It's all tailored to me, based on their listening, which is a very developed skill, very powerful. — Client

What it looks like in the room.

Every engagement moves through the same four stages — and every stage looks different in practice. Here's a glimpse.

Team mapping the creative process around a strategy board
/i Determine

Naming the result, the gap, and what's actually getting in the way.

Diverse leadership team working together in a modern office
/ii Engage

Sitting with the key players, listening for the blind spots that hold the whole team back.

Team in a working session reviewing documents together
/iii Deliver

Workshops, coaching, hard conversations — wherever the work needs to happen.

Leadership team gathered in conversation at the end of the day
/iv Manage

Staying close to the work after the workshop ends — until the results show up.

We have learned that listening is far more important than speaking. How we listen sets the stage for the entire conversation.

It is possible to learn how to listen and speak in a way that resonates with your clients and team. This is a game-changer.

resounding

What it sounds like to work with us.

They have the ability to provide open and honest feedback without having people shut down.

Their one-liners have so much impact.

They can hear bullshit a mile away.

Empathetic, authentic — while still holding others accountable.

They communicate perfectly — clear and accountable for the words they use.

They put me at ease immediately — I was able to trust them easily and even be raw.

They are true to the value they say they will provide. They're as committed, or even more committed, than you are — to what you want to accomplish.

They listen without definition, without stories, or things in the background.

REAL · RESOUNDING · RESULTS

More than four decades developing leaders — and the high-performing companies they build.

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Theresa Jabbour
Theresa Jabbour
Founder & Principal

Theresa Jabbour is the Founder and Principal of Resonance Consulting and has been helping organizations achieve meaningful business transformation for more than 30 years.

A highly respected executive coach, leadership advisor, and facilitator, Theresa has led communication and leadership workshops for more than 12,000 participants across Canada, the United States, New Zealand, Switzerland, England, and France. Her work has helped leaders and organizations strengthen communication, elevate performance, and create lasting cultural change.

Drawing on extensive experience in sales, leadership, and team management across a wide range of industries and organizational settings, Theresa brings a practical, real-world perspective to every client engagement. Having led and managed teams in diverse environments, she understands firsthand the challenges leaders face and what it takes to build high-performing, accountable teams.

Known for her ability to quickly identify the underlying issues that limit growth and effectiveness, Theresa works closely with executives and leadership teams to create transformational breakthroughs. Her approach combines strategic insight, practical application, and a genuine commitment to the people she serves, enabling organizations to achieve extraordinary, sustainable results.

Theresa is reliable for delivering exceptional value that exceeds expectations, creates lasting impact, and equips leaders and organization to perform at their very best for years to come.

M
Mike Mahannah
Mike Mahannah
Senior Partner

Mike has been an entrepreneur, business owner, and leader since the age of 27, when he became a partner and co-owner of a six-person engineering sales company, Olympic International.

Operating within the construction industry, Olympic International grew from a small organization into the dominant company in its market, employing more than 100 people. In addition to driving organic growth, Mike successfully expanded the business through strategic acquisitions. He also implemented and executed a 10-year succession plan that developed the next generation of leaders and facilitated the successful sale of the company to them, ensuring the business continued to thrive long after his departure.

In 1991, Olympic International acquired a small sheet metal fabrication shop in Calgary and transformed it into a leading manufacturing company producing high-quality, custom HVAC products for institutional and industrial facilities across North America. The company later expanded into the data center sector, where it established a reputation as a trusted, top-tier partner. Mike ultimately led the successful sale of this business for $260 million to a major manufacturing company in a transaction that was exceptionally well executed, ensuring employees, shareholders, and customers were all treated fairly and positioned for continued success.

Throughout his career, Mike has faced and overcome the challenges of building high-performing teams, fostering empowering organizational cultures, developing strong leaders, and driving sustainable business growth. His leadership philosophy emphasizes accountability, integrity, and the creation of environments where people are encouraged to acknowledge mistakes openly and where those experiences become opportunities for collective learning and continuous improvement.

Mike attributes much of his success to the unique methodologies and principles offered by Resonance Consulting, which helped elevate both his leadership effectiveness and business results.

What our clients say.

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Their communication is like surgery — they listen really well and understand the source of the problem.

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They listen for your experience, not for information — and also for what you are not saying, and whatever needs to be addressed.

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Very connected to people, related to the conversation and really listens.

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They ensure that they get to the heart of the matter — regardless of your ability to communicate.

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They are a leader — no matter the circumstances — and very tenacious. Relentless in a respectful way.

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They put a lot of energy, thought and effort into every communication.

Ideas worth resonating.

When You Are Ready

When you are ready to elevate your company's performance and profitability, create fully engaged teams, and transform the way people communicate — we should talk!

Let's Talk