Sinan Si Alhir is a Practitioner. He has over two decades of experience in all aspects of software development. With a proven performance record in aligning Business and Technology using industry-recognized and organization-tailored Lean, Agile, and other Best Practices, he focuses on transforming organizations by cultivating effective Communities of Practices (CoPs). He is commonly categorized as an "Essentialist" and "Resultant" who is measured by "Stickiness."

As a Consultant, he focuses on doing what is essential for achieving results where he is measured by the sustainability of his influence. He is deeply committed to working with individuals, teams, and organizations to actualize their potential and achieve an enduring competitive advantage.

He is a Certified Scrum Master (CSM), Project Management Professional (PMP), IT Project Management Certified Professional (IT Project+), and e-Business Certified Professional (e-Biz+). He is a member of the Agile Alliance, Agile Project Leadership Network (APLN), and Scrum Alliance. He is the author of "UML in a Nutshell" (O'Reilly & Associates), "Guide to Applying the UML" (Springer-Verlag), "Learning UML" (O'Reilly & Associates), and articles on the "Unified Modeling Language (UML)" and "Unified Process (UP)" in the "Encyclopedia of Software Engineering" (John Wiley & Sons) among other publications. He commonly speaks at various professional events (conferences and user groups).