• About Us

    SK is a Leading Private Investigator with a 27-year old history licensed by the Singapore Police Force and supported by strong networks of more than 3000 Professional Members in over 68 Countries.

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  • Our Services

    Our Private Detectives in Singapore are equipped with specialized investigation skills and surveillance technology to gather evidence quickly and stealthily from marital affairs to corporate fraud.

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  • Announcements

    From 300 only a final 200 worthy invitees will be chosen to be a part of the prestigious and inaugural edition of Outstanding Organisation Class of 2011 In South East Asia.

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SK Investigation Services is a private investigators agency located on 511 Guillemard Road #01-31, GrandLink Square, Singapore. We are licenced to provide private investigation services and we have been in operation since 1988; maintaining a high quality of services all through since inception of SK Investigation Services twenty four years ago. We serve both individual, group and corporate clients and we tailor make our investigation package according to a client's specific needs.

SK Investigation Services is managed by Mr. Lawrence Koh, who has over two decades experience in both field and desk investigation and above all in a certified Member of the Council of International Investigator (CII-USA), World Association of Detectives, Inc.(WAD-UK).

We are a dedicated team of private detectives who strive to be the best and give the best. We update our professional knowledge by continuously upgrading our skill sets through mentorship, short certification courses, workshops, seminars among other methods so that we provide the best service to our esteemed clients. Quality service, both locally and overseas, is what has made us win an award as the best of the top 200 Outstanding Organization in South East Asia.

Get a Private Investigation Free Consultation with our 24 hours helpline @ +65 64404683 .

You will be assisted by a Government’s Licensed Private Investigator, not a sales person.

We take all calls, 24 hours a day including weekends and public holidays.

We offer a non-obligatory complimentary professional consultation.

We handle thousands enquiries on a monthly basis.

This has been our core business for the last 27 years. Do take advantage of our professional services with our International Standard Expertise at no extra cost.

Free Consultation usually takes 15 minutes

We will ask all keys questions.

We will look beyond your case problem.

We will render sound advice based not just on our passed experiences, but also from those of our Client’s.

We will suggest few strategic plan options for you.

We will forward our quotations for the various suggested plan options.

What we will expect from our Client

We request that you do not interfere with our investigators while we are conducting our surveillance work on your case.

In order not to jeopardize our ongoing investigations, you shall not directly or indirectly procure, engage or solicit the services of another private investigation agency and their private investigator/s to simultaneously conduct a similar investigation and surveillance on the same matter.

We would like you to cooperate by providing us with full and accurate details of all information to the best of your knowledge in relation to the matter, be it the “Subject” and/or any other specific persons in connection to the “Subject’, which will greatly help to facilitate our full Investigation and Surveillance Operations.

You shall not withhold any information within your knowledge nor provide misleading information relating to the “subject” or matter which will jeopardize or present difficulties to the work, services, manner, operations and full conduct of our investigation and surveillance.

It is important that you provide us with information of utmost accuracy as that will improve the success rate on solving your case.

We would like you to notify and update us immediately, should there be any changes during the course of the investigation and surveillance.

We request that you keep the finding, results, information, evidence, photographs, video of our services confidential, and in no circumstances may you use the product or results for criminal or illegal purposes.

Any information with respect to the client and subject except exclusively for the purpose, use and benefit of the client or unless compelled to disclose by Juridical or administrative procedures or by other requirements of Law in/or out of Singapore.

SK Investigation Services Blog

We have gone a step further and Mr. Lawrence Koh has initiated a blog where he shares his knowledge about private investigation services, private detectives, qualifications and skills to become a private eye, how Singapore private investigators go about their business as well as sharing some insights here and there about investigation sg as well as some interesting tit bits about private investigation. He also takes time to address some of the questions and concerns people have by writing detailed blog articles on them. Feel free to visit blog/ and learn more about private investigators and the work we do.

Code of Conduct

We accord each investigation the privacy it deserves and we do not divulge any client information to any third party unless compelled by the rule of law. We have a professional and ethical code of conduct that each member of our investigation team adheres to and we never acquire any investigative information through illegal means. We also ensure that all information presented to the client is valid and truthful and can be ascertained and hold water in a court of law. Integrity, honesty and professionalism are our guiding principles.


Our Singapore private investigators / detectives are equipped with hi-tech tools and equipment we use are top of the range and we strive to keep abreast with the technological advances. Some of the investigative equipment we use is: GPS trackers, cameras, video recorders, polygraphs, lie detectors, digital cameras that can be used at night as well as audio-visual devices that can zoom and record in a distance spanning 8kms (i.e. 5 miles).

Contact Us

If you have any further queries about SK Investigation, our certifications, services, professional qualification or any other queries that you need addressed, you may contact us on:


511 Guillemard Road #01-31
GrandLink Square Singapore 3998499QF
Tel: ( 65) 64404683 Fax: (65) 68411334
Email: enquiry@sk.com.sg

Or you can visit our contact us page and fill out the enquiry form that will be sent directly to us.

We also have a FAQ (Frequently Asked Question) page that you can check out via faqs to learn more and expand your knowledge. new