Welcome to 3S

3S (established in 2002) is a Safety, Health & Environmental Consultant. We offer a wide range of Safety, Health & Environmental services, supported by our dedicated team of professionals.

Our company aims to be a leading associate to local and international businesses by allowing our clients to engage the services of a single company that can meet all of your SHE needs. 3S offer practical solutions in safety, health and environment that meet or exceed the expectations of our clients. We achieve this through effective development and implementation of safety, health and environment plan.

Mission Statement

3S is dedicated to help you create a SAFER
workplace by providing excellent SERVICE
throughout and ensuring your SATISFACTION

3S Management

Mr Alan Loh

Managing Director

Alan has a wide range of workplace safety, health & environmental management experiences in the construction, pharmaceutical plants, manufacturing factories, shipyards, petroleum, oil & gas and logistics industries. Alan is a Registered WSHO and ECO with more than 15 years of experience. He is actively involved in corporate servicing for numerous renowned organizations. He set up his own consultancy office in 2002 and leads a team of dedicated WSHE professionals.

Mr Kengi Sieu

Director (Sales & Marketing)

Kengi graduated from Nanyang Technological University with a degree in Applied Science. He is now Marketing Director and his responsibilities include the day to day management of the business, as well as leading the company in strategic marketing and business development.  Kengi is a Registered WSHO and ECO with more than 13 years of experience and has handled a wide range of projects including renowned government and private projects.

Mr Andrew JJ Tan


Andrew J J Tan is a seasoned HSE Professional with more than 25 years of experience in the marine, offshore oil & gas, construction and manufacturing industries. His broad areas of specialization include shipyard safety and construction safety, covering civil engineering, building and tunneling. Andrew is also experienced in the implementation & auditing of Integrated Management System and had spent a significant number of years in project and facilities management. Andrew is a registered Workplace Safety & Health Officer, Environmental Control Officer, approved Scaffold Supervisor, approved Fire Safety Manager and also a MOM Approved Risk Consultant. He has been appointed as Technical Expert acting on behalf of the Singapore Accreditation Council.

Mr Jonathan Sim

Business Development / WSH Manager

Jonathan graduated from the Singapore Institute of Management with a Bachelor in Applied Science (Construction Management) in 2009. He also holds a Diploma in Building and Property Management , with Singapore Polytechnic. Jonathan is also a registered Workplace Safety & Health Officer and Environmental Control Officer. He brings with him core strengths in project management, construction, environmental, health and safety experiences and have handled a wide spectrum of projects.

3S Corporate Structure