Global SME, operating in 48 countries

SQS (Sterling Quality Services) is an global reaching SME operating in 48 countries, with many high profile clients across the industries, some of which have been working with SQS for 25 years and more.

Operating in 48 Countries 

Sterling Quality Services operates in 48 countries worldwide. 

With offices in the UK, Perth & USA SQS provide local resources on a global scale supporting projects in a socially and environmentally sustainable way.

2000 Local Inspectors 

Sterling Quality Services Inspectors are all handpicked and local to the specified project. Assisting our clients in meeting their local content requirements and keeping the focus on sustainability and social impact.

SQS Regions Covered 
North America

Canada, United States

Western Europe

Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, Turkey, United Kingdom


Egypt, South Africa, Morocco

South America

Brazil, Mexico, Argentina, Venezuela

Eastern Europe

Czech Republic, Estonia, Hungary, Poland, Romania, Russia, Slovakia, Slovenia

Middle East

Oman, Pakistan, Saudi Arabia, United Arab Emirates

Asia Pacific/Far East

Australia, Malaysia, China, India, Japan, Korea, Singapore, Taiwan, Thailand, Vietnam

American flag waving
SQS Office 

Pennzoil Place,700 Milam,
Suite 1300,Houston,

Texas, 77002

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Head Office

7 The Boulevard,

Hazel Grove, Stockport,

Manchester, SK7 5PA

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SQS Office 

Level 29,
221 St. Georges Terrace,
Perth, WA 6000