4 — mechanical, electrical, process, welding/QA
Disciplines hired
Company · Careers
Careers at Arrow Energy: engineering work that starts from a calculation
Arrow Energy Co., Ltd. (Thailand) hires mechanical, electrical, process and welding/QA engineers to design electrostatic precipitators from first principles, commission plants across Thailand, Indonesia and Latin America, and develop the proprietary Electrocyclone and DeSOx/DeNOx systems. Open positions are published on LinkedIn; a calculation-backed argument beats seniority here.
3 — Thailand, Indonesia, Latin America
Site-work regions
Sizing to outlet targets down to ≤ 10 mg/Nm³ @ 6 % O₂ dry
Design work basis
85–95 % stage collection, service temperature ≤ 400 °C
R&D envelope (Electrocyclone)
01 — The work
What engineers do at Arrow Energy
Three kinds of work: design from first principles, commissioning on site, and R&D.
Arrow Energy Co., Ltd. is a Thai engineering company — described in full on the About Arrow Energy Co., Ltd. page — that designs, builds and services electrostatic precipitators, the proprietary Electrocyclone, and boiler pressure parts. The engineering work here splits three ways.
Design. ESPs are sized from the plant's own fuel analysis, gas flow and emission target — not scaled from a previous job. A designer here works the full chain: dust load in mg/Nm³ at stated O₂, migration-velocity sizing (Matts-Öhnfeldt, k ≈ 0.5), collecting area, field count, absorbed power, and the n−1 case. On the published design basis that means taking 6,000 mg/Nm³ of bagasse fly ash down to 24 mg/Nm³ at 6 % O₂ dry through an Electrocyclone and four-field electrostatic precipitator — and being able to show every step.
Site. Field engineers run erection checks, air-load V-I curves, gas-load tuning and guarantee tests to EPA Method 5 / ISO 9096 — the sequence described under commissioning services — at plants in Thailand, Indonesia and Latin America. Cold plus hot commissioning of a four-field ESP indicatively takes 2–4 weeks on site.
R&D. The Samut Sakhon centre develops the Electrocyclone pre-collector — 85–95 % stage collection at service temperatures to 400 °C — and DeSOx/DeNOx flue-gas treatment. R&D engineers run test campaigns, reduce the data and feed the results directly into the sizing rules the design office uses.
02 — Disciplines & locations
Who we hire, and where they sit
Four disciplines across two Thai sites, Jakarta and the field.
| Discipline | Typical work | Base |
|---|---|---|
| Mechanical engineering | ESP and Electrocyclone structural and internals design, casings, hoppers, boiler pressure parts to ASME Section I / JIS practice | Bangkok HO / Samut Sakhon factory |
| Electrical engineering | Transformer-rectifier selection, automatic voltage controllers, rapping control, plant interfaces | Bangkok HO, with commissioning travel |
| Process engineering | Gas-side sizing, fuel and ash characterisation, heat-recovery calculations, DeSOx/DeNOx development | Bangkok HO / Samut Sakhon R&D |
| Welding / QA engineering | WPS/PQR/WPQ to ASME Section IX, weld inspection, NDT coordination, material traceability, factory and site ITPs | Samut Sakhon factory, with site assignments |
Field-service and commissioning roles are staffed from all four disciplines and travel across Thailand, Indonesia and Latin America; the Jakarta office additionally hires locally for Indonesian site work. Quality and welding roles work inside the system described on the certifications and quality system page.
03 — What we value, and how to apply
Calculation beats seniority
The honest version of a careers pitch: how decisions are made and how to get in.
What is it like to work as an engineer at Arrow Energy?
Design reviews are decided by calculation, not by rank: an engineer two years out of university who brings a correct sizing — collecting area, migration velocity, absorbed power, all with units — wins the argument against a senior opinion without one. The trade-off is that every claim you make will be checked the same way.
That standard comes from the top: the CEO reviews proposals and rejects unsupported numbers, and the same review culture applies internally. What the company values in engineers, concretely: the habit of writing the basis before the answer; willingness to go to site and see the equipment that the drawings describe; and curiosity about failures — a burned insulator or a warped plate is treated as data, not as blame. What it does not require: prior ESP experience. The physics is taught; the discipline of showing your work is the entry requirement.
We do not list vacancies on this page, because a static list goes stale and a fake one is worse. Open positions are published on the company's LinkedIn page: CONFIRM: LinkedIn company page URL. Speculative applications are read — send a CV and a short note on something you have designed, built, commissioned or fixed to CONFIRM: careers email address, stating your discipline. If the note contains a number with a unit, it will be noticed. Questions about a specific role can also go through the contact and RFQ page, marked for the attention of the engineering managers.
FAQ
Engineering questions, answered
What do engineers actually work on at Arrow Energy?
Designing electrostatic precipitators and Electrocyclone trains from fuel and gas data — sizing to outlet targets such as 24 mg/Nm³ at 6 % O₂ dry on the published design basis — commissioning ESPs and boilers on site in Thailand, Indonesia and Latin America, and R&D on the Electrocyclone and DeSOx/DeNOx flue-gas treatment at the Samut Sakhon factory.
How do I apply for a job at Arrow Energy?
Open positions are published on the company's LinkedIn page. You can also send a CV and a short note on what you have designed, built or commissioned to the careers email address, stating your discipline — mechanical, electrical, process, or welding/QA. Applications go to the engineering managers, not to an applicant-tracking filter.
Do Arrow Energy engineers travel to site?
Design and R&D roles are based in Bangkok and Samut Sakhon with occasional site visits. Field-service and commissioning roles travel by definition: cold and hot commissioning of a four-field ESP indicatively runs 2–4 weeks per plant, at sites across Thailand, Indonesia and Latin America. Travel expectations are stated per role in the posting.
What does Arrow Energy look for in an engineer?
The ability to defend a number. Sizing here runs through models such as Matts-Öhnfeldt (k ≈ 0.5) rather than copied references, and design reviews are decided by whoever brings the better calculation — a junior engineer with a correct one outranks a senior opinion without one. Curiosity about failed equipment is valued over polish.
Send us your plant data
Fuel, boiler capacity, gas flow, current emission and the limit you must meet. An Arrow engineer replies with a technical assessment basis — not a brochure.