We’re an international supplier of essential services to facilities and premises owned by our clients. From humble beginnings as a small family business over 100 years ago, we’ve scaled our specialisms and expertise to offer a range of high quality, sustainable and internationally accredited services. We work at the heart of our clients’ businesses, and our sector expertise means we can design sustainable service solutions that align with their business strategies. Our heritage and family values set us apart in the global facilities management services marketplace. Since the business started in 1900, we have a long history of doing the right thing for our clients, colleagues and all who interact with our services. With such strong foundations, we’re committed to growing and improving our sustainable services to meet the ever more complex needs of businesses large and small in the 21st century. Over the years we’ve expanded our operations internationally to become the world’s largest family-owned facilities management services company. Our sector-specific expertise and knowledge of local legislation, customs and business practices throughout the world means we can provide bespoke services that suit your business needs. OCS is managed under two different brands - OCS and Landmark - delivering specific areas of expertise to clients, with significant operations across the UK, Ireland, Middle East, Asia and Australasia.