About the Author

William Walker, MS, RD, CSOWM, is a board-certified specialist in obesity and weight management with over two decades of experience helping individuals achieve lasting health through evidence-based strategies and compassionate care. As the founder of Smart Shift Life, William combines science, structure, and mindset to guide clients in creating meaningful change—one shift at a time.

In addition to his work as an author and wellness educator, William serves as the Weight Loss Program Director at Core Rejuvenation Med Spa in Mansfield, TX, where he works alongside physician and clinic owner Dr. Shelley Lenamond. Together, they provide a comprehensive, physician-led approach to weight management that integrates medical treatments like metabolic testing, GLP-1 medications, and body composition analysis with personalized nutrition, behavioral tools, and expert coaching.

William's multidisciplinary background—including clinical nutrition, bariatric care, personal training, and leadership in food and wellness services—gives him a rare, real-world perspective on what it truly takes to transform health from the inside out.