About T-M-T Services International (TMTSI), LLC
Transforming Leaders. Strengthening Teams. Elevating Organizations Through 3xP Leadership®
T-M-T Services International, LLC (TMTSI) is a leadership consulting and professional development firm committed to helping organizations and individuals unlock their full potential. Founded by Dr. Marc D. Williams, DM (“Dr. No Days Off”), TMTSI delivers research-based, results-driven solutions that strengthen leadership capacity, improve organizational culture, and elevate performance across every level of an organization.
At TMTSI, we believe leadership is not a title; it is a discipline. When leaders grow, organizations grow. Our mission is to help leaders lead with clarity, confidence, and purpose through the proven 3xP Leadership® Framework: Purpose, People, Process, and Performance.
Our Philosophy: Leadership Excellence Starts with Purpose
Organizations thrive when they have leaders who understand why they lead, who they serve, how they execute, and what results they expect.
The 3xP Leadership® method guides leaders in:
Defining and communicating their Purpose
Empowering and developing their People
Strengthening and simplifying their Process
Delivering consistent, measurable Performance
Our framework has transformed leaders across corporate, educational, military, and nonprofit sectors, building stronger cultures, better communication, and high-performing teams.
“Keep a basic principle of a determination to achieve excellence.”
What TMTSI Delivers
We help clients solve real leadership challenges through:
Leadership Consulting & Organizational Development
Strategic solutions that improve culture, communication, accountability, and operational effectiveness.
Executive Coaching & Leadership Mastery
Personalized coaching that strengthens decision-making, emotional intelligence, influence, and executive presence.
Leadership Training & Professional Development Workshops
High-impact sessions that equip leaders and teams with practical tools for immediate performance improvement.
Professional Review & Editing Services
Expert editing and review support for dissertations, research, résumés/CVs, and professional documents.
From Fortune-level organizations to community-based institutions, TMTSI delivers clarity, structure, and leadership excellence where it matters most.
Why Organizations Choose TMTSI
Clients trust TMTSI because we provide:
Proven leadership frameworks with real results
Customized solutions tailored to your needs
Insight from a seasoned leadership strategist and practitioner
Training and coaching that improve performance immediately
Culturally responsive leadership guidance rooted in integrity and excellence
A “No Days Off” commitment to continuous improvement and growth
Your success is our mission.
Our Promise
We don’t offer quick fixes; we build leaders, strengthen systems, and create lasting transformation.
Whether you are improving leadership within your team, elevating your organizational culture, or preparing for the next level of growth, TMTSI stands ready to help you achieve results with Purpose, People, Process, and Performance at the core.
“Excuses are tools of the incompetent, and they build monuments to nothingness. People who excel in excuses usually do not excel in anything else.”
Dr. Marc D. Williams, DM
Executive Leader • Veteran • Author • Practitioner-Scholar
Dr. Marc D. Williams, DM is an accomplished executive leadership strategist with more than 20 years of experience in corporate leadership, military service, higher education, and organizational development. Known globally as “Dr. No Days Off (Dr. NDO),” he brings a powerful blend of academic expertise, military discipline, and real-world operational experience to every training, coaching, and consulting engagement.
Dr. NDO’s work is grounded in research, shaped by practical leadership challenges, and guided by a commitment to helping leaders perform at the highest level, professionally and personally.
Dr. Williams is also the author of The BlackPrint of Leadership® series, which provides actionable strategies for leaders navigating today’s complex environments.
“Whatever my mind can conceive and believe, I will achieve!”
Business Certifications | Licenses
DUNS: 054232128 SAM UEI: SJYQC3JHML87 CAGE: 76N57
NAICS Codes: 541611 – Administrative Management and General Management Consulting Services 541612 – Human Resources (Personnel) Consulting Services 541613 – Customer Service, Sales, Marketing, Management Consulting Services 541618 – Other Management Consulting Services 561110 – Executive Management Services (including executive coaching) 611430 – Professional and Management Development Training
