In Loving Memory of William H. “Bill” Stoller
Oklahoma City, OK — The business and human resources world has lost a visionary and a leader, as William H. Stoller, beloved founder and CEO of Xenium, passed away unexpectedly. Known affectionately as “Bill” by friends, family, and colleagues, his passing marks the end of an era for those who knew him personally and professionally. As of this writing, the cause of death has not been publicly disclosed, though his death has deeply shaken the many communities he helped build and lead.
Bill Stoller was not only a successful entrepreneur—he was a man whose values, integrity, and forward-thinking leadership reshaped the way organizations think about people. He leaves behind a legacy rooted in service, innovation, and compassion.
A Visionary Leader and Pioneer in Human Capital Development
Bill founded Xenium HR, a premier human resources firm, with a single goal: to redefine the employee-employer relationship in a way that fostered dignity, development, and meaningful work. Under his leadership, Xenium flourished into a nationally recognized name, empowering businesses across industries to support their people with cutting-edge solutions and a human-first approach.
To those who worked with him, Bill was a mentor and motivator. He believed in empowering others and was always quick to recognize the strengths of his team. A proponent of lifelong learning and adaptive leadership, Bill’s values helped shape Xenium’s mission to create healthier, more sustainable workplaces.
“Bill didn’t just build a company,” a longtime colleague shared. “He built a movement around respect, innovation, and the belief that every individual in an organization deserves to grow.”
A Humble Beginning and a Life of Purpose
Though known later in life for his executive success, Bill Stoller never lost sight of his roots. Raised with strong values and a deep sense of community, he carried those principles into every stage of his life. Before founding Xenium, he co-founded Express Employment Professionals, another leading staffing company that today helps millions find meaningful work.
Bill’s approach to business was always deeply personal. He understood that people weren’t just assets—they were the heart of every organization. That belief guided his philanthropic efforts, his leadership, and his daily interactions.
Legacy of Mentorship and Service
Bill’s impact extended far beyond boardrooms and conference calls. He was an active philanthropist, mentor, and advocate for education and workforce development. He served on numerous advisory boards and contributed to initiatives supporting youth leadership, technical training, and community development.
His quiet generosity helped fuel countless scholarships, community programs, and non-profit ventures. But to Bill, it was never about recognition. He gave because he believed in potential—especially the kind that wasn’t always seen by others.
A Life Remembered
Bill Stoller is survived by his family, who meant the world to him, as well as countless friends, business partners, and mentees who credit him with changing their lives. To know Bill was to know warmth, wisdom, and a steady, calm presence. His ability to listen deeply, lead with humility, and act with integrity made him beloved in every circle he entered.
As news of his passing spread, tributes poured in from across the country—from fellow CEOs and nonprofit leaders to young professionals whose lives were touched by Bill’s mentorship. His legacy will continue to inspire those who believe that business can be both profitable and profoundly human.
Celebration of Life and Tributes
A public memorial service will be held in Oklahoma City on a date to be announced by the Stoller family. In lieu of flowers, the family requests that donations be made in Bill’s memory to a workforce development program or education initiative of your choice—causes he championed throughout his life.
A private celebration of life will also be hosted for close friends and family, reflecting the deep personal bonds that defined Bill’s world beyond his professional success.
Final Words
William H. “Bill” Stoller was more than a founder and CEO—he was a builder of people, a believer in human potential, and a steward of hope in both the corporate world and the community. While his passing leaves an irreplaceable void, the example he set will endure for generations.
Rest in peace, Bill. Your vision changed lives. Your legacy lives on.