About Dennis Donnel Sumlin
Dennis Donnel Sumlin: Self-Mastery Guide/Mentor
Dennis Donnel Sumlin is a Self-Mastery Mentor and the founder of Core Confidence Lifestyle, a personal life strategy guidance and consulting practice. He leads classes and mentoring programs that give adults the tools, training, and initiation they need to fully own themselves mentally, emotionally, and energetically. With more than 20 years of experience in mentoring and education, Dennis specializes in psychology, self-awareness training, metaphysics, and the deeper work of personal identity and purpose.
He holds a certification in Life Coaching from Erickson College International, is trained in peer coaching and mentoring, and is a Distinguished Toastmaster through Toastmasters International, recognizing his leadership and excellence in public speaking and communication.
Dennis mostly works with:
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People who feel “different,” intense, or misunderstood
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Those transitioning identities (spiritual, professional, personal)
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Men stepping into maturity, leadership, or self-mastery
Before founding Core Confidence Lifestyle, Dennis served as an advocate and leader for adoptees, people with disabilities, and other underserved communities — helping reduce legal and practical barriers to independence, visibility, and upward mobility.
His work often weaves together practical mindset training with spiritual and metaphysical insight, including numerology, astrology, and personal development frameworks that help men and women build inner strength, clarity, and self-respect.
Outside of work, Dennis enjoys studying history and spirituality, reflecting on human behavior and culture, and spending quiet time with loved ones.
The Mission
Dennis’s mission is both simple and revolutionary:
To help you reclaim your divine energy, trust your inner wisdom, and become who you were always meant to be, unapologetically, unshakably, and unforgettably you.
Media Kit
- See the Press Kit page
If you would like to interview Dennis, or have him speak at your event, please contact Dennis@CoreConfidenceLife.COM or fill out the form below.
Interviews with Dennis Donnel Sumlin
Men’s Mental Health Discussion
Numbers and You with Lloyd Strayhorn
Compatible Relationships with Dre and Te
Written Interviews
8 Questions
Dennis answers 8 questions for The Inner Cyrcle blog.
Other Interviews
South African’s Connection
10 minute mindset
On this 10 Minute Mindset…..its the “C” word! Dennis sits down with Mario and they rap about self-awareness, how to build confidence and more, in less than 20 minutes. Get quick tips to leapfrog, head first, into the big C!
Real Men Feel
Dennis sits down with Andy Grant from Real Men Feel. They talk self-confidence, self ownership, spirituality and more.
The Anything Goes Project with Mike Simmons
The Flourish Podcast
Inspire Direct
Josh Shachnow
The Top Romp Show – Confidence is key
The Solopreneur Grind Podcast
Global Men’s Conference
On November 19, 2021, International Men’s Day, men from across the world came together to discuss the challenges that men face today. This 16 hour conference was organized by One Africa Forum. Dennis Donnel Sumlin was one of the speakers and hosts.