I’m excited to share a deeper look into my professional journey as a speaker, consultant, trainer, and advocate for Relentless Championship. Over the years, I’ve been fortunate to work with extraordinary organizations, interview exceptional leaders, and help teams elevate their performance through mindset, behavior change, and consistent action. If you’d like to learn more about the experiences and principles that have shaped my work, I invite you to read the full story. Here is my biography.

I am excited to share a comprehensive biography that reflects the journey, experiences, and leadership principles that have shaped my career across more than four decades in the building products and distribution industries. It highlights my commitment to strategic growth, operational excellence, and values-based leadership as I continue exploring opportunities to contribute through board and advisory roles.

I’ve been incredibly fortunate throughout my career—starting in the Executive Office of the President, launching and growing multiple companies, and leading global nonprofit boards. Today, I’m passionate about helping organizations and leaders reach their highest potential through strategic vision, mentorship, and board governance. Here is my biography.

After decades of leading engineering and operations across the cosmetics, medical device, and consumer product industries, I’m now exploring board and advisory opportunities where I can continue to make a difference. I bring a wealth of experience in product development, supply chain, and large-scale manufacturing, and I’m passionate about helping teams and businesses grow with purpose. Here is my biography.

David Jennings is a seasoned executive leadership coach and transformation strategist with more than 30 years of experience leading complex change, guiding agile transformations, and coaching senior leaders across industries. With a passion for helping people and organizations thrive, he brings a unique blend of strategic insight, operational excellence, and human-centered leadership to every engagement.

Darlene Sullivan is a seasoned sales executive and transformational leader known for driving top-line growth, optimizing customer satisfaction, and building high-performing teams within some of the world’s most complex organizations. With a proven track record across IT, digital, workforce, and security transformation, she has successfully led multibillion-dollar initiatives while navigating mergers, acquisitions, and organizational change. Darlene thrives in fast-paced environments, consistently exceeding performance goals and forging lasting executive relationships that fuel long-term success in the marketplace.

I’m excited to share my journey as CEO of Tandem Group, where I've dedicated my career to driving transformative change and aligning leadership teams for exceptional business results. Over the past 15 years at Tandem, I've partnered with renowned organizations across various industries, enhancing strategic planning and fostering cultures of innovation. My track record includes guiding companies like Johnson & Johnson and Eastman Chemical to achieve remarkable growth, and my expertise in organizational transformation has been instrumental in navigating complex challenges. I invite you to explore my insights on leadership, culture change, and strategic growth!