Our people are the power

The Diamond Mind collective features leaders who truly show up for our clients.

They live into the values we all share and hold at the heart of everything we do. They’re experienced, excellent at what they do and care deeply about getting you the results you need.

When you engage Diamond Mind, we’ll put together the exact right roster for you to design the perfect alchemy for progress that we all know we can achieve — together.

Founder & CEO

Tom Rosenak

Tom created Diamond Mind to help people. He works with individuals, teams and organizations to help them transform and elevate performance and drive results by deploying strengths and improving relationships. He helps people overcome barriers, improve sales and presentation skills, and have stronger executive presence. Once you meet him, you’ll feel the magic and see the tangible results his clients rave about.

Meyers-Briggs Type Indicator
Situational Leadership (SL11)
Master Certified Change Works Practitioner
Strength Deployment Inventory
Emotional intelligence (EQ-I 2 assessment)

Adrienne Guerrero

A seasoned change management professional, Adrienne’s background is rooted in communication and learning development. In her consulting practice at Positive Delta and in her work with Diamond Mind, Adrienne coaches leaders and teams for resilience, adaptability and team building to implement solutions that increase adoption and improve team and co-worker performance. Adrienne has worked for many years leading global change initiatives in support of new service delivery models and systems. Rooted in behavioral science practices, Adrienne applies a comprehensive analysis and empathetic style to effectively help leaders get to the root of their employees’ change and organizational needs.