Kok Shin Lin, CEO
Leads everything client-facing: clients, suppliers and delivery. A lifelong construction professional with a background in facade engineering, and the construction depth in the partnership.
About Susten
Ten people, and contracts that run fifteen years.
That is the first thing worth knowing about us, because it is the question everyone has and almost nobody asks. We are a small, senior, engineering-led company in Kuala Lumpur, and we sign agreements that outlast most of the buildings' management teams. Here is who we are and how we are built to carry that.
What we are
An energy services company, not a contractor.
Susten is an ESCO. We audit a building's energy use, redesign and rebuild the systems wasting the most of it, and then operate and measure what we built. The distinction from a contractor is not a matter of positioning. A contractor is paid for installing equipment and is finished when it is commissioned. We are paid out of the savings, for as long as the contract runs, so we are still there in year eight when the performance either held or did not.
In this climate the largest and most recoverable waste is almost always thermal, which is why cooling plant is where most of our delivered work sits. It is not the boundary of the company. Heat that is thrown away, control logic nobody has revisited in a decade, and plant running hard against a load that is not there are all the same problem wearing different clothes.
Founded on 26 November 2020 as Zog Intelligence Sdn Bhd and later renamed Susten Sdn Bhd. Same
legal entity throughout, registration 202001038622 (1394943-U). Project records from the early
years may carry the former name. The name itself is a contraction of sustainable, energy and
engineering.
The people
Flat, senior, and close to the plant.
Two co-founders and a CTO leading the engineering, with a team in which nearly everyone is within one step of a real machine.
Rachel Koay, CSO
Leads everything internal. Built the commercial model the company runs on, read the regulatory shift early, and drove the creation of the cloud energy management system.
Ir. Calvin Chay, CTO
Leads the core engineering: custom chiller design, plant systems and control engineering. The technical signature on what goes into a client's building.
Behind them sit project and site engineering, IoT, business development led by an engineer, operations and admin. About ten people in total. That is small for the size of the assets we build, and we would rather you heard it from this page than worked it out in a meeting.
What it buys you. There is no account manager between you and the person who designed your plant. Decisions do not queue behind a regional office. When something is wrong at two in the morning, the people who can fix it are the people who built it.
What it costs you. We cannot run unlimited projects at once, and we say no more often than a larger firm would. When a project is not a fit we would rather tell you in the first conversation than take it and stretch.
Interested in the engineering rather than the company?
See open roles
How we work
Five things we actually run on.
These are not a poster in reception. Each one has cost us something, which is the only test that matters.
01
Candor
Say the true thing, especially when it costs. We would rather challenge a client's assumption early than agree politely and be wrong together later.
02
Ownership
Owners, not renters. If you see a problem it is yours. Act, then align.
03
Measured, not promised
Claims are cheap and the meter is not. We report the number even when it disappoints, and we have corrected our own published figures against our own interest.
04
Design, do not default
We build for the real building, the real load and the real climate, never for the catalogue. Anyone can resell a chiller.
05
Waste is the enemy
Wasted energy, wasted money, wasted time. Cutting waste is not a service line. It is the reason the company exists.
And one rule above the five: fast where we can correct, certain where we cannot. We move quickly
on decisions, bids and software, where a wrong call can be reversed. We are uncompromising on
engineering, commissioning and anything a building will depend on for the next fifteen years.
Speed in the office. None at all in the plant room.
The boundaries
Things we do not do, so you do not have to ask.
- We do not manufacture. We specify to open standards and tender competitively, so you keep the freedom to source spares, service and upgrades from anyone. A proprietary system makes that decision for you once, for fifteen years.
- We do not write sustainability reports. No reporting frameworks, no materiality assessments, no Scope 3 accounting. We produce the measured reduction and its basis. Someone else reports it.
- We do not publish client names or client consumption data. Projects appear here by building type and state. That policy is the reason we can publish performance data at all, and we extend it to you.
- We do not quote savings we have not measured. Where a capability is real but not yet metered, the site says so on the page rather than in a footnote.
Start somewhere
The first step costs you nothing.
An energy audit, funded by the government, on a building you already own. If it turns out there is little to recover, we will say so and that will be the end of it.