Global Facility Services

Global Facility Services (GFS), Powered by Global Water Technology, Inc, was founded on the same principles of excellence, partnership, and innovation that have fueled GWT’s growth since 1990. Leveraging the expertise of GWT’s founder, Maria E. Villarreal, and her husband, William H. Byerley—who established Hill Mechanical Group’s facility services division—GFS was created to meet the evolving needs of clients seeking a trusted partner in engineering and facility operations. As an extension of GWT’s nationally recognized platform, GFS brings the same client-first approach to building services, offering comprehensive solutions across engineering, maintenance, and operations. Our teams work with clients in hospitality, healthcare, commercial real estate, data centers, education, manufacturing, and other complex environments to ensure safe, efficient, and sustainable facilities. Our strength lies in our people. GFS professionals combine technical expertise with a passion for service, working collaboratively to solve complex challenges and deliver measurable value. We provide our teams with the resources, training, and support they need to succeed, because we know that when our people thrive, our clients benefit. At GFS, we don’t just maintain buildings—we create environments where people and businesses can succeed. By combining GWT’s infrastructure, scale, and national recognition with a relentless focus on client outcomes, GFS is uniquely positioned to deliver trusted, innovative, and sustainable facility solutions.