More Than Programming
Ask most people what a control systems engineer does and they will guess it involves writing code for machines. That is part of it, but on an FMCG production site the role is much broader: part electrician, part programmer, part problem solver, and part project coordinator. At BevTech, control systems engineers work across Allen Bradley and Siemens PLC platforms on beverage and food manufacturing lines throughout Queensland, and no single day looks quite the same as the last. This article walks through what a typical day actually involves, from the early morning site visit through to the evening handover, to give a realistic picture of the role.
Early Morning: Reviewing Overnight Alarms
The day usually begins before arriving on site, reviewing any alarm logs or overnight call outs from client production lines. Modern PLC and HMI systems log fault history in detail, and a control systems engineer will often start by scanning through this data to spot patterns, a drive that has tripped twice in the past week, a sensor giving intermittent readings, or a communication fault between a PLC and a remote input output rack. This early diagnostic work often shapes the rest of the day’s priorities, particularly if a pattern suggests a developing fault that could cause unplanned downtime if left unaddressed.
Mid Morning: On Site Fault Finding
Once on site, a significant portion of the role involves hands on fault finding. This might mean tracing a wiring fault back from a motor to a control panel, checking analogue signal integrity on a flow sensor feeding a hot water rinse system, or working through PLC logic step by step to understand why a sequence is not advancing as expected. Fault finding on a live production line requires a particular mindset: working methodically under time pressure, because every hour a line is down is lost production for the client, while never cutting corners on safe isolation procedures.
This is also where the breadth of BevTech’s specialisation matters. Because the team works across both Allen Bradley and Siemens platforms, a control systems engineer needs to be genuinely fluent in both ecosystems, from Studio 5000 and RSLogix through to TIA Portal, rather than being a specialist in only one manufacturer’s tools.
Midday: Programming and Logic Development
Not every day is reactive fault finding. Planned project work often fills the middle of the day, writing or modifying PLC logic for an automation upgrade, building HMI screens that give operators clearer visibility of a process, or configuring a variable speed drive for a new pump installation. This work draws heavily on the engineer’s understanding of the physical process being controlled, whether that is a glycol refrigeration system managing beer tank temperature, or a clean in place sequence cycling through caustic, acid, and rinse stages on a can seamer.
Good control system programming in an FMCG environment is not just about making a machine run, it is about making it run safely, efficiently, and in a way that is maintainable by the next engineer who has to modify it in five years’ time. Clear, well documented logic is a genuine professional discipline, not an afterthought.
Afternoon: Client Liaison and Commissioning
A meaningful part of the role involves direct communication with client site staff and plant managers, explaining a fault in plain language, agreeing a plan for a planned shutdown, or walking an operator through changes made to an HMI screen. On commissioning days, this becomes even more central: testing new or modified control logic against the physical equipment, verifying safety interlocks function correctly, and working through a structured commissioning checklist before signing equipment back over to production.
Commissioning a new system, such as an automated glycol refrigeration control upgrade or a new hot water rinse sequence, is one of the most satisfying parts of the role. It draws together weeks or months of design, programming, and coordination with mechanical and electrical trades into a single, tangible outcome: equipment running reliably and safely under the new control system.
Late Afternoon: Documentation and Handover
Engineering work is not finished when the equipment is running. Updating control philosophy documents, revising electrical drawings to reflect as built changes, and recording programme version history are all essential parts of the job, even if they are less visible than the hands on work. This discipline matters enormously in an industry where equipment often runs for a decade or more, and where the next engineer working on a system, whether from BevTech or elsewhere, needs accurate documentation to work safely and efficiently.
Evening: On Call Readiness
Because BevTech provides 24/7 electrical coverage to its FMCG clients, control systems engineers are part of a rostered on call system to support genuine emergencies outside standard hours. A beer tank losing refrigeration control, or a canning line stopping mid shift, cannot wait until the next business day. Being part of this coverage model is a core part of the role, and it reflects the seriousness with which BevTech treats its commitment to keeping client production lines running.
Skills That Make a Strong Control Systems Engineer
Technical ability with PLC platforms is only part of what makes someone effective in this role. Equally important is the ability to think through a physical process logically under pressure, understanding not just what a piece of logic does, but why the underlying mechanical or thermal process behaves the way it does, whether that is glycol flow through a heat exchanger or the sequencing logic in a caustic clean in place cycle. Strong control systems engineers develop a genuine mental model of the equipment they work on, not just the code controlling it.
Communication skills matter just as much as technical depth, since a fault explained clearly to a plant manager, or a commissioning plan agreed clearly with production staff before work begins, prevents far more problems than they solve after the fact. The strongest engineers in this field combine deep technical competence with the ability to translate that competence into plain language for the people who rely on the systems they maintain.
Working Across Multiple Client Sites
Unlike an engineer employed directly by a single manufacturing site, a control systems engineer working for an engineering partner such as BevTech typically works across a range of FMCG client sites, from large scale beverage producers to smaller specialist manufacturers. This brings genuine variety, each site has its own equipment history, control philosophy, and operational quirks, and it also builds a much broader base of practical experience than working on a single facility ever could. Engineers who work this way often become the person a client turns to first, precisely because they bring pattern recognition and experience gathered from problems solved elsewhere, not just familiarity with one site’s systems.
A Role Built on Variety and Trust
What stands out across a typical day is the sheer variety, technical depth one hour, client communication the next, hands on fault finding followed by careful documentation. It is a role that rewards curiosity, discipline, and a genuine interest in how physical processes and control logic interact. For engineers who want to build a career grounded in real industrial systems rather than purely office based programming, this is exactly the kind of work BevTech offers across its Queensland client base.