HVAC PLC Controls Engineer: Design, Program & Commission

Custom Air Products & Services; Houston (TX); On-site; USD 90,000 - 140,000; Full time

Job summary

Custom Air Products & Services, Inc. (CAPS) is a Houston-based HVAC integrator seeking a Programmer Engineer to design, develop, and implement PLC-based control systems for custom HVAC equipment and field projects.

The role partners with engineering, fabrication, and field teams to ensure proper design, programming, testing, and commissioning. The candidate will create electrical designs, control sequences, and software, performing FAT/SAT support and on-site start-up.

Qualifications

• Bachelor’s degree in Electrical Engineering, Mechanical Engineering, or related field (or equivalent experience)
• 8–10 years of experience in HVAC, manufacturing, or industrial controls environment
• Strong PLC programming experience with Siemens and/or Allen-Bradley
• Experience with HVAC controls, sequences of operation, and system integration
• Proficiency in AutoCAD Electrical
• Knowledge of electrical power and control circuits (AC/DC)
• Familiarity with ASHRAE guidelines and NEC requirements
• Experience with hazardous location requirements; IEC/ATEX knowledge preferred
• Ability to read and interpret customer drawings, specifications, and system schematics
• Strong troubleshooting and problem-solving skills
• Ability to manage multiple projects and meet deadlines
• Effective communication and collaboration skills

Responsibilities

• Develop, program, and test PLC-based control systems for custom HVAC equipment design
• Create PLC programs from initial concept through final commissioning
• Support FAT and SAT, including system start-up and troubleshooting
• Debug, troubleshoot, and modify PLC programs for existing systems
• Design and document HVAC sequences of operation
• Develop electrical wiring diagrams, control schematics, and panel layouts using AutoCAD Electrical
• Perform electrical calculations, including MCA and MOCP, SCCR and wire sizes
• Select control components and define electrical interconnections
• Prepare and maintain BOMs for controls and electrical systems
• Review and incorporate redlines and as-built documentation
• Collaborate with engineering, fabrication, and field personnel to resolve technical issues
• Communicate control system functionality and design intent to internal stakeholders and installation teams
• Maintain organized electronic files for programs, drawings, and project documentation

Skills

PLC programming

Siemens/AB PLCs

AutoCAD Electrical

HVAC controls

Problem solving

Communication

Travel for site work

Education

Bachelor’s degree in Electrical/Mechanical Engineering

Tools

AutoCAD Electrical

PLC programming tools

Job description

Custom Air Products & Services, Inc. (CAPS) is a Houston-based HVAC integrator seeking a Programmer Engineer to design, develop, and implement PLC-based control systems for custom HVAC equipment and field projects.

The role partners with engineering, fabrication, and field teams to ensure proper design, programming, testing, and commissioning. The candidate will create electrical designs, control sequences, and software, performing FAT/SAT support and on-site start-up.