Mainguard Security Services Pte. Ltd.


Mainguard International

Established 40 years ago in Asia’s commercial hub – Singapore, Mainguard is one of the few licensed companies in Asia today that specialises corporate investigations.

The company was founded by Major (ret) P. Kalastree who was elected as President of the Council of International Investigators (2001-2002), and a former recipient of the International Investigator of the Year (1998) presented by the Council of International Investigators – a US based association for security practitioners and private investigators with the membership background from FBI, CIA and intelligence organizations worldwide covering over 40 countries.

Mainguard has also produced another International Investigator of the Year, awarded by the Council of International Investigators to Sheila Ponnosamy in 2010. She was also awarded the Meritorious Service Award, and became President of the Council of International Investigators in 2014.

In October 2013, Mainguard was one of the top 3 companies in Singapore to receive a Distinguised Award for Small Medium Enterprises (SME) which is a prestigious business award for the SME sector in Singapore.

Through its international affiliations in over 10 professional associations and extensive global network in the Asia-Pacific region and the West, Mainguard has acquired a good working knowledge of countries worldwide such as:

  • Australia
  • Bangladesh
  • Cambodia
  • Canada
  • France
  • Germany
  • Hong Kong & China
  • India
  • Indonesia
  • Japan
  • Korea
  • Malaysia
  • Myanmar
  • Philippines
  • South Africa
  • Sri Lanka
  • Thailand
  • Taiwan
  • United Arab Emirates
  • United Kingdom
  • USA
  • Vietnam

On 1 November 2008, Mainguard International (S) Pte Ltd entered a joint venture with Globe Detective Agency Pvt Ltd, the largest private investigations firm in India.

Through this venture, the Mainguard Group has access to Globe’s offices in over 20 cities in India.

The Clients

Mainguard’s investigation clients are from both Singapore and overseas. They include law firms, insurance companies, multinational corporations, shipping firms and organizations from various industry sectors. The investigations may involve assignments throughout the Asia-Pacific region.


Mainguard is an advocate of professionalism for the private investigations industry in Singapore and the Asia-Pacific region.

The company constantly benchmarks its quality of work against the reputed international firms, and maintains a code of ethics prescribed by international investigations associations.

Mainguard has always ensured that the management staff are kept abreast on the latest issues, trends and technology pertaining to the investigations world by attending international and regional conferences and training seminars.

A Trained Investigations Team

Mainguard’s investigations team has a diverse a range of expertise and experience comprising of research and analysis, undercover operations, forensic accounting, surveillance, international trade matters, competitive intelligence and others.

The investigations team undergo both classroom and on-the job training, and they are sent for courses to upgrade their knowledge and skills.

Our Commitment to You

All phases of investigation will be carried out discreetly. The reports are provided in confidence, and where possible, the investigators will provide feedback on the background details of the environment where the case is located. This information will assist clients in evaluating the reports in the right perspective.