We bridge the gap between what you know, and what you need to know.

Originally founded in 2000 as Diligence USA LLC, the company merged and joined forces with Portman Square Group in late 2020 following a successful management buyout.

We work with our clients in a bespoke fashion to confront and resolve business challenges and identify opportunities in today’s global economy. Working throughout North & South America, Europe, the Middle East and Asia, Portman Square Group supports the information and security requirements of companies in a wide variety of sectors including oil/gas, mining, pharmaceuticals, manufacturing and retail, as well as leading law firms, financial institutions, hedge funds, private equity firms and high net wealth individuals.

Our services include due diligence, investigations and litigation support, asset tracing, strategic and competitive intelligence gathering, risk and threat assessments, security services and cyber security support.

Why Hire Us?

• A team with a proven track record of success with over 20 years and thousands of completed projects involving  complex, multi-jurisdictional investigations, asset tracing, due diligence and strategic intelligence collection

• A talented, multilingual staff with a diverse array of backgrounds including the intelligence community, law enforcement, military, communications, public policy, research and data-mining

• An extensive global network of contacts

• Decades of experience in the identification and development of sources and the elicitation of information

• Unparalleled open source research and data-mining capabilities