Why mechatronics is the natural feeder degree
Controls engineering sits exactly at the intersection of disciplines that the mechatronics curriculum already integrates — electrical engineering (motor drives, sensors, instrumentation), computer engineering (PLC programming, real-time systems), mechanical engineering (machine design, motion systems), and control systems theory (PID tuning, state-space, signal processing).
A traditional EE graduate moving into controls usually has stronger fundamentals on the electrical side but needs to pick up the mechanical-system awareness that mechatronics graduates already have. A traditional ME graduate moving into controls usually has the mechanical awareness but needs to learn PLC programming and instrumentation. The mechatronics graduate arrives with both, plus integration experience from senior projects — which is why hiring managers at industrial-automation employers often prioritize mechatronics graduates for controls roles.
The remaining gap that most new controls engineers fill in their first 18-24 months on the job is industry-specific knowledge: HACCP and SQF for food and beverage, GMP and GAMP 5 for pharma, OSHA Process Safety Management for chemicals and refining, NRC requirements for nuclear, FAR Part 21 for aerospace.
What controls engineers actually do
Daily work is a blend of design, implementation, and commissioning:
- Control-system architecture and specification. Choosing the PLC platform, networking architecture, HMI/SCADA strategy, instrumentation, and safety system for a new project. Producing functional design specifications (FDS).
- PLC programming. Ladder logic, structured text, function-block, and increasingly object-oriented PLC programming in Allen-Bradley Studio 5000 or Siemens TIA Portal.
- HMI and SCADA development. Operator screens, alarm management, batch recipe management, trend displays, historian integration.
- Instrumentation engineering. Specifying pressure, flow, level, temperature, and analytical instruments. Reviewing P&IDs (piping and instrumentation diagrams) and instrument datasheets.
- Safety system design. Safety PLCs (GuardLogix, Siemens Safety Integrated, Pilz), risk assessments per ISO 13849 or IEC 62061, safety-instrumented systems (SIS) per IEC 61511 for process industries.
- Industrial networking. EtherNet/IP, PROFINET, OPC UA, increasingly Time-Sensitive Networking (TSN) for high-determinism applications.
- Commissioning and startup. The on-floor part: integrating equipment from multiple vendors, verifying the system works as specified, training operators and maintenance, ramping to production rate.
- Documentation. Functional design specs, software design specs, IO lists, alarm databases, narratives, validation protocols (in regulated industries).
What you'll earn
BLS does not break out controls engineers as a separate SOC code; they fall under 17-2199 (Engineers, All Other), where the May 2024 OES median sits around $116,000. Industry-specific salary surveys typically peg controls engineers at the upper end of that SOC's pay distribution:
| Career stage | Typical base | Notes |
|---|---|---|
| Entry (0-2 yrs) | $75K–$95K | Higher at large integrators and EV plants |
| Engineer II (2-5 yrs) | $90K–$120K | Two-platform fluency develops here |
| Senior (5-10 yrs) | $115K–$150K | Specialization (pharma GMP, semiconductor, EV) |
| Lead / Staff (10-15 yrs) | $135K–$175K | Project lead at integrator or end-user |
| Principal / Engineering Manager (15+ yrs) | $160K–$220K+ | + bonus, profit share |
Sources: BLS OEWS May 2024 for SOC 17-2199; industry salary surveys from Glassdoor and ZipRecruiter aggregated 2026.
Where pay moves above the median
- OEM application engineer roles at Rockwell, Siemens, Schneider, Emerson — top of the band, often $130K-$175K base plus equity.
- Senior integrator project lead — Burns Engineering, Optimation, Maverick (Rockwell Solutions), Wood Group — $125K-$170K base plus utilization bonuses.
- EV battery plant commissioning leads — premium hires through 2028 as plants ramp.
- Semiconductor fab automation — Intel, TSMC, Samsung, Micron pay above the manufacturing-industry median.
- Pharma GMP controls — Pfizer, Merck, Lilly, J&J pay 10-15% above non-regulated equivalents.
- Oil and gas controls — refinery and petrochemical controls engineers earn premiums tied to commodity-cycle volatility.
PLC and SCADA platforms in depth
Rockwell Automation (Allen-Bradley)
- PLC families: ControlLogix (large), CompactLogix (small-to-medium), Micro800 (entry).
- Programming: Studio 5000 (replaces RSLogix 5000).
- HMI: FactoryTalk View Site Edition (server-class), Machine Edition (terminal-class).
- SCADA: FactoryTalk View SE, increasingly FactoryTalk Optix.
- Dominance: US discrete manufacturing, automotive, food and beverage, mid-size process plants.
Siemens
- PLC families: S7-1200 (small), S7-1500 (large), S7-300/400 (legacy installed base).
- Programming: TIA Portal (Totally Integrated Automation).
- HMI/SCADA: WinCC (Comfort, Advanced, Professional, Unified).
- Dominance: global process industries, European-OEM US plants, increasingly US automotive.
Ignition by Inductive Automation
- SCADA platform, not a PLC. Pairs with any PLC via OPC UA.
- Free Ignition University certification path.
- Fast-growing in US process industries because of unlimited-tag licensing model.
- Pay premium for Ignition-experienced engineers per Indeed posting analysis.
Other platforms
- Mitsubishi (semiconductor fabs, Japanese-OEM plants): GX Works software.
- Schneider Modicon (legacy US process): EcoStruxure Control Expert.
- Beckhoff (high-speed precision, packaging): TwinCAT (PC-based).
- Codesys (underlying engine for many smaller-brand PLCs).
- Emerson DeltaV (pharma, oil/gas), Yokogawa CENTUM (refining), Honeywell Experion (refining and power) — DCS-class systems, used at large process plants.
Top hiring industries
- Pharmaceutical manufacturing. Pfizer, Merck, Lilly, J&J, Amgen, AbbVie, BMS, Catalent, Lonza. GMP-regulated environment; specialized credential expectations.
- Semiconductor manufacturing. Intel, TSMC, Samsung, Micron, GlobalFoundries; equipment OEMs Applied Materials, Lam Research, KLA. CHIPS Act buildout driving sustained hiring.
- EV battery plants. BlueOval SK, Ultium Cells, AESC, Envision, SK On. Ramping through 2028.
- Automotive. OEMs (Ford, GM, Stellantis, Toyota, Honda) and tier-ones (Bosch, Magna, Denso, Continental, Aisin).
- Food and beverage manufacturing. PepsiCo, Coca-Cola, Tyson, Nestle, Mars, Kraft Heinz, AB InBev.
- Chemicals / refining / oil and gas. Dow, BASF, DuPont, ExxonMobil, Chevron, Phillips 66, Valero, Marathon. Gulf Coast concentration.
- Water and wastewater. Municipal utilities and contract operators. Strong PE-licensure path; public-sector stability.
- Power generation. Utility-scale solar, wind, traditional thermal, hydropower. Smaller controls headcount per plant but stable.
- Building automation. Smart-building controls at large commercial campuses, data centers, hospitals. Johnson Controls, Honeywell Building Technologies, Siemens Smart Infrastructure.
Top employers
- End-user manufacturers (in-house controls teams): All large-employer references above for pharma, semiconductor, automotive, EV, food and beverage, chemicals.
- Systems integrators: Burns Engineering, Optimation, Stone Technologies, Wood Group, Maverick (now Rockwell Solutions), Cybertrol, Concept Systems, Avanceon, Polytron, IRIS Automation, Banner Engineering, ATS Automation.
- Automation OEMs (application engineers and field service): Rockwell Automation, Siemens Industry, Schneider Electric, Emerson Automation Solutions, ABB Process Automation, Honeywell Process Solutions, Yokogawa, Endress+Hauser, Beckhoff.
- Engineering consultancies: Burns & McDonnell, Black & Veatch, Stantec, AECOM (industrial side), Jacobs Engineering, CRB Group (pharma specialist), IPS-Integrated Project Services.
- Federal facilities and labs: NASA ground control systems, Department of Energy national labs, Naval Surface Warfare Centers.
How to become a controls engineer: step by step
Step 1 — Earn an ABET-EAC accredited BS (years 1-4)
Best-fit degree options:
- BS in Mechatronics Engineering (ABET-EAC) — strongest curriculum overlap.
- BS in Electrical Engineering — slight gap on mechanical-systems awareness, strong on EE fundamentals.
- BS in Mechanical Engineering — slight gap on PLCs and controls software; usually closed quickly on the job.
- BS in Chemical Engineering — natural fit for process-industry controls work (DCS-class systems).
- BS in Computer Engineering — natural fit for industrial-software-heavy controls roles.
Step 2 — Get hands-on PLC time during college (years 2-4)
The single biggest predictor of placement is hands-on PLC and HMI experience. Even if your program does not have a heavy controls focus, free resources can build the skills:
- Inductive University (Ignition SCADA, free, certificate of completion).
- Rockwell Automation TechED on-demand and recorded webinars.
- Siemens SITRAIN online courses (some free).
- RealPars, SCADAHacker, PLC Academy on YouTube for self-paced learning.
A senior project that demonstrates a complete PLC + HMI deliverable is the highest-leverage portfolio piece for controls-engineer applications.
Step 3 — Land the first job (year 4)
Three realistic first-job pathways:
- Systems integrator (recommended for fastest learning). Fast project velocity, exposure to many platforms and industries. Burns Engineering, Optimation, Stone Technologies, and similar regional integrators recruit heavily from ABET-EAC engineering BS programs.
- OEM application engineering (strongest pay). Rockwell, Siemens, Emerson, Endress+Hauser hire entry-level application engineers who support customers with their platforms. Strong pay, steep learning curve, often involves rotational programs.
- End-user manufacturer controls team. A large pharma or food plant's in-house controls team is a slower-paced first job but builds deep domain knowledge.
Step 4 — Take the FE exam (senior year)
Either FE Electrical and Computer or FE Mechanical works for the future PE Control Systems pathway. See our FE exam guide.
Step 5 — First 18 months in role
- Master one PLC platform deeply. Two is too many to learn at once; pick one and own it.
- Get involved in commissioning. On-floor experience is the differentiator that separates competent controls engineers from those who can only do bench work.
- Pursue ISA Certified Control Systems Technician (CCST) Level I or II if your employer supports it.
- Learn one structured-text-heavy domain (motion control, batch sequencing) deeply enough to be the team's go-to.
Step 6 — Accumulate PE experience (years 4-8)
If you target the PE Control Systems exam, document engineering work under a licensed PE through these years. See our PE licensure guide.
The PE Control Systems pathway
NCEES offers PE Control Systems as a standalone discipline exam (not part of PE Electrical or PE Mechanical). The exam is 8 hours, computer-based, year-round. Sub-topics cover signals and process measurement, signal-conditioning, controllers and tuning, final control elements, safety systems, communications, and documentation.
The PE Control Systems is the most relevant PE exam for controls-engineering work that involves:
- Water and wastewater treatment plant controls.
- Transit and transportation infrastructure controls.
- Building automation for public-sector buildings.
- Engineering consulting work that produces sealed drawings for any of the above.
- Some federal-facility engineering work.
For controls engineers at end-user manufacturers (in-house roles), the industrial exemption in most state engineering codes makes the PE optional. The PE Control Systems is still useful as a credential for moving into consulting later in career.
Skills checklist
PLC and HMI platforms (table stakes — at least one to working depth)
- Rockwell Studio 5000 + FactoryTalk View, OR Siemens TIA Portal + WinCC.
- Exposure to the second of those two platforms.
- Ignition by Inductive Automation (free training, fast-growing in process industries).
Control systems fundamentals
- Classical control theory: PID tuning, frequency response, stability analysis.
- State-space methods at introductory depth.
- Process control: cascade, ratio, feedforward, model-predictive control basics.
- Motion control fundamentals if relevant to your industry: servo tuning, gantry coordination, electronic camming.
Instrumentation
- Pressure, flow, level, temperature transmitters at specification and calibration depth.
- HART communication.
- Analyzer instruments if process-industry focused (gas chromatographs, mass specs, pH/ORP).
Industrial networking
- EtherNet/IP (Rockwell-heavy), PROFINET (Siemens-heavy), Modbus TCP, OPC UA.
- Basic IP networking — VLANs, subnetting, managed switches.
- Industrial cybersecurity awareness (IEC 62443 framework).
- Increasingly: Time-Sensitive Networking (TSN) basics.
Software development practices
- Source control for PLC code (increasingly common; Rockwell PlantPAx, Siemens TIA Portal version-control plugins, third-party tools like Copia or VersionDog).
- Object-oriented PLC programming (PackML, ISA-88 batch standards).
- Scripting for automation: Python for data handling, PowerShell for Windows-OS automation.
Industry-specific knowledge
- For pharma: GMP, GAMP 5, 21 CFR Part 11, validation lifecycle.
- For food and beverage: HACCP, SQF.
- For chemicals and refining: OSHA PSM, IEC 61511 (SIS).
- For semiconductor: SEMI standards, cleanroom protocols.
- For water and wastewater: state-specific operator certifications, NSF/ANSI standards.
Career growth and pay anchors
- Controls Engineer I (entry, 0-2 yrs): $75K–$95K base.
- Controls Engineer II (2-5 yrs): $90K–$120K base.
- Senior Controls Engineer (5-10 yrs): $115K–$150K base.
- Lead Controls Engineer or Project Engineer (10-15 yrs): $135K–$175K.
- Principal Engineer or Controls Engineering Manager (15+ yrs): $160K–$225K+.
- OEM application engineer track: typically caps higher than end-user track at most levels; $110K-$185K range across seniority.
Job market outlook
Controls engineering is consistently cited in US manufacturing surveys as one of the most-difficult-to-fill engineering specialties. The combination of multi-discipline depth required (electronics + mechanics + software + industry-specific knowledge) limits the candidate pool, while the structural growth drivers below are pulling demand upward through 2030:
- CHIPS Act semiconductor fab buildout. Each new fab requires hundreds of controls engineers.
- EV battery plant ramp. ~30 announced US battery plants through 2028.
- Pharma manufacturing reshoring driven by supply-chain restructuring.
- Water and wastewater infrastructure upgrades funded by the IIJA (Bipartisan Infrastructure Law).
- Industrial cybersecurity demand as IEC 62443 compliance becomes standard.
- Industry 4.0 / IIoT deployments requiring SCADA modernization at thousands of existing plants.
Controls engineer vs automation engineer
The two titles substitute often. Vocabulary differences:
- Controls engineer — older title, more common in process industries, owns PLC code + instrumentation strategy + SCADA architecture.
- Automation engineer — more common in discrete manufacturing, owns the integrated cell (PLCs + robots + vision + safety together).
Same BLS SOC code (17-2199), similar pay, similar skill base. Many engineers use both titles interchangeably on their resume depending on the role they are applying for.
Pitfalls and things to know
- Travel is common. Integrator and OEM roles involve significant travel during commissioning. End-user roles can require travel to vendor sites for FAT (factory acceptance testing) and to remote plant facilities.
- Industry switching is harder than it looks. A pharma controls engineer moving to oil and gas faces a steep learning curve on industry-specific standards. Plan your industry choice carefully.
- The PLC code you write outlives you. Controls engineers regularly debug code that was written 15-20 years ago by an engineer who has retired. Write code that other engineers can maintain.
- Cybersecurity awareness is increasingly a job requirement. Engineers who can speak IEC 62443 fluently command meaningful pay premiums; the field is shifting from "controls engineer who is aware of security" to "controls engineer who actively manages security."
- Watch for "controls engineer" postings that are really senior-technician roles. Some smaller manufacturers post engineer-titled roles at technician-level pay. Verify pay band before investing time.
Frequently asked questions
Controls engineer vs automation engineer — same job?
Close, with industry vocabulary differences and a gradient of typical work. "Controls engineer" is the older title, more common in process industries (chemicals, pharma, oil & gas, water/wastewater) where the engineer owns the PLC code, instrumentation strategy, and SCADA architecture. "Automation engineer" is more common in discrete manufacturing (automotive, electronics, consumer products), where the engineer owns the integrated cell — robots, conveyors, vision systems, PLCs together. Both report under BLS SOC 17-2199 (Engineers, All Other) with similar median pay. The labor market often uses the titles interchangeably.
How does controls engineer differ from controls technician?
Different SOC codes, different work, different pay. A controls technician (under SOC 17-3024) maintains the control systems the controls engineer designed. The technician does day-to-day troubleshooting, replaces failed components, executes preventive maintenance, and modifies existing programs. The controls engineer designs new systems, owns the architecture, signs off on changes, and leads commissioning. Median pay for the engineer role runs about $45,000 above the technician role.
What does a typical controls engineer get paid?
Per BLS OEWS May 2024 data for SOC 17-2199 (Engineers, All Other, which includes controls and robotics engineers), the national median sits around $116,000. Industry salary surveys (ZipRecruiter, Glassdoor, Coursera summaries) place controls-engineer-specific pay in the $95,000-$125,000 median range, with senior controls engineers and systems integrators regularly $130,000-$170,000. Field-service and OEM application-engineering roles at Rockwell, Siemens, and other automation vendors top the band.
Is the PE Control Systems exam worth taking?
It depends on your work. For controls engineers at end-user manufacturers (in-house roles), the industrial exemption in most state engineering codes makes the PE optional. For systems integrators who work on public-sector projects — water/wastewater treatment plants, transit systems, building automation in public-sector buildings — the PE is closer to mandatory because the engineer signs and seals submittal drawings. NCEES offers the PE Control Systems exam as a separate discipline; many cleared-pathway candidates take it. See our PE licensure guide.
Which PLC platform should I prioritize?
For US discrete manufacturing, Allen-Bradley (Rockwell Studio 5000, ControlLogix and CompactLogix families) is the default. For global process industries and European-OEM US plants, Siemens (TIA Portal, S7-1500 family) is dominant. Most controls engineers eventually work on both. The practical answer: learn the platform your first employer runs to working depth, then add the second on the job within 12-18 months. Two platforms deep is the threshold where pay moves above the median consistently.
Can I become a controls engineer with a mechatronics degree?
Yes — controls engineer is the single most common engineer-tier landing role for ABET-EAC mechatronics graduates. The mechatronics curriculum covers most of the prerequisites: control systems theory, PLCs, electronics, basic SCADA. The remaining gap is usually filled in the first 1-2 years on the job, especially industry-specific knowledge (e.g., HACCP for food, GMP for pharma, PSM for chemicals).
What is the difference between a controls engineer at an end-user vs a systems integrator?
Three differences worth knowing. (1) End-user controls engineers (in-house at a manufacturer) own a smaller equipment footprint long-term — typically continuous improvement, troubleshooting hard problems, and managing capital projects. Slower pace, better work-life balance. (2) Integrators (Burns Engineering, Optimation, Maverick Solutions, Stone Technologies, Wood Group) ship projects across many customers and industries — much faster learning velocity, more travel, more variety. (3) OEM application engineers (Rockwell, Siemens, Schneider) support customers using their platforms — strong pay, mostly remote with periodic travel, deep platform expertise.
What is the job outlook for controls engineers?
Strong through 2034. BLS projects roughly 6-7% growth for the umbrella SOC 17-2199 plus related engineering categories from 2024-2034. Specific structural growth drivers: CHIPS Act semiconductor fab construction, EV battery plant ramp-up, water and wastewater infrastructure upgrades (driven by federal funding), industrial cybersecurity demand (IEC 62443), and ongoing Industry 4.0 / IIoT deployments. The role is regularly cited as one of the most-difficult-to-fill engineering specialties in US manufacturing surveys.
Sources & methodology
- BLS OEWS — Engineers, All Other (SOC 17-2199). May 2024 OEWS release.
- NCEES — PE Control Systems Exam. Exam specification and registration.
- ISA (International Society of Automation). CCST and CAP certification frameworks.
- Association for Advancing Automation (A3). Industry hiring and demand data.
- Control Global / Control magazine. Industry reporting on hiring and trends.
- Inductive University. Free Ignition SCADA training.
Industry salary survey medians are aggregated from Glassdoor, ZipRecruiter, and Coursera summaries of 2026 postings. Pay anchors are calibrated to typical US engineering labor markets.