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Freelance Plc Hmi Programmer Jobs in Riverside, CA

Cannon Corp

Senior Automation Specialist

Irvine, CA · Hybrid

$92K - $138K/yr

Strong knowledge of PLC systems (Rockwell Automation, Modicon), HMI programming, and SCADA integration. * Proficiency in industrial wiring diagrams, ladder schematics, and logic drawings.

Cannon Corp.

Senior Automation Specialist

Irvine, CA · On-site

$92K - $138K/yr

Strong knowledge of PLC systems (Rockwell Automation, Modicon), HMI programming, and SCADA integration. * Proficiency in industrial wiring diagrams, ladder schematics, and logic drawings.

Vans

Maintenance Technician III, 2nd Shift

Ontario, CA · On-site

$30.80 - $38.50/hr

... PLC/HMI level triage (alarm interpretation, I/O checks, verifying interlocks). (Programming changes only if authorized/qualified; otherwise partner with PLC Engineer.) • Coordinate response for ...

Vans

Maintenance Technician III, 2nd Shift

Ontario, CA

$30.80 - $38.50/hr

Support PLC/HMI level triage (alarm interpretation, I/O checks, verifying interlocks). (Programming changes only if authorized/qualified; otherwise partner with PLC Engineer.) Coordinate response for ...

BioPhase Solutions

Automation Engineer

Anaheim, CA

$159K/yr

Hands-on development + troubleshooting on PLC platforms (e.g., AB, Rockwell other will be valued). * SCADA/HMI Engineering - Practical configuration/support experience (AVEVA/Wonderware, WinCC other ...

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All JobsPlc Hmi Programmer JobsFreelance Plc Hmi Programmer JobsFreelance Plc Hmi Programmer Jobs in Riverside, CA

Freelance Plc Hmi Programmer information

See Riverside, CA salary details

$42.3K

$84.2K

$116.8K

How much do freelance plc hmi programmer jobs pay per year?

As of Aug 11, 2026, the average yearly pay for freelance plc hmi programmer in Riverside, CA is $84,154.00, according to ZipRecruiter salary data. Most workers in this role earn between $70,900.00 and $96,500.00 per year, depending on experience, location, and employer.

What are common challenges faced by freelance PLC HMI programmers when working with multiple clients?

Freelance PLC HMI programmers often encounter challenges such as managing different client expectations, adapting to various industrial standards and hardware platforms, and ensuring clear communication despite remote or off-site work. Each project may require familiarity with unique software environments and legacy systems, which demands flexibility and quick learning. Additionally, freelancers must effectively prioritize tasks and maintain thorough documentation to ensure smooth project delivery and future troubleshooting.

What skills and qualifications are needed to thrive as a freelance PLC HMI programmer?

To thrive as a Freelance PLC HMI Programmer, you need expertise in industrial automation, strong programming skills in PLC languages (like ladder logic), and a solid understanding of control systems, often backed by engineering or technical certifications. Familiarity with PLC software (such as Siemens, Allen Bradley, or Schneider), HMI/SCADA platforms, and relevant industry standards is crucial. Excellent problem-solving, communication, and project management skills help you collaborate with clients and adapt to diverse industrial environments. These capabilities ensure reliable automation solutions, client satisfaction, and successful project delivery in complex manufacturing settings.

What is a freelance PLC HMI programmer?

Freelance PLC HMI Programmers are professionals who work independently to design, develop, and troubleshoot control systems that use Programmable Logic Controllers (PLCs) and Human-Machine Interfaces (HMIs). They are typically contracted by manufacturing, automation, or industrial companies to create or modify automation processes, ensuring efficient and reliable operations. Their work involves programming PLCs, configuring HMI screens, integrating equipment, and sometimes providing on-site support or remote troubleshooting. Freelancers in this field usually have strong backgrounds in electrical engineering, automation, or related disciplines.

What is the difference between Freelance Plc Hmi Programmer vs Automation Technician?

AspectFreelance Plc Hmi ProgrammerAutomation Technician
CredentialsTechnical certifications in PLC/HMI programming, relevant software skillsTechnical diploma or associate degree in automation or electrical technology
Work EnvironmentProject-based, remote or on-site, client-specificOn-site industrial or manufacturing facilities
Industry UsageUsed across manufacturing, process control, and automation projectsPrimarily in maintenance, troubleshooting, and system setup

Freelance Plc Hmi Programmers focus on designing and programming PLC and HMI systems for various clients, often working independently. Automation Technicians handle installation, maintenance, and troubleshooting of automation equipment on-site. While both roles require technical certifications and industry knowledge, Freelance Plc Hmi Programmers typically work on specific projects remotely, whereas Automation Technicians are more hands-on in industrial environments.

What are popular job titles related to Freelance Plc Hmi Programmer jobs in Riverside, CA? For Freelance Plc Hmi Programmer jobs in Riverside, CA, the most frequently searched job titles are:
What job categories do people searching Freelance Plc Hmi Programmer jobs in Riverside, CA look for? The top searched job categories for Freelance Plc Hmi Programmer jobs in Riverside, CA are:
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Freelance Plc Hmi Programmer jobs near you

Control Systems Engineer

EVO Power USA, Inc.

Rancho Santa Margarita, CA • On-site

Full-time

Re-posted 23 days ago

Job description

Job Description
ABOUT US
EVO Power is an International Energy Technology Company headquartered in Australia. At EVO we promote diversity and equality of opportunity in all EVO Power's work and practices and are building a staff culture where everyone is valued and supported to be their best.
Our business specializes in cutting-edge design and commercialization of integrated lithium-ion Battery Energy Storage Systems (BESS) and software solutions tailored to the Commercial, Industrial and Small Utility renewable energy markets. These solutions are especially focused on the rapid adoption of renewable energy resources and electric vehicle charging solutions.
EVO Power is going through a period of strong and sustained growth in Australia and has recently expanded its business into the US and South Korea.
As part of our long-term strategy to continue this unprecedent growth, an opportunity exists for a Control Systems Engineer.
ABOUT THE JOB
The Control Systems Engineer is a developing role within EVO Power's Technology team.
This position is designed for early-career engineers with a solid foundation in software coding and development, who are looking to apply these skills within control systems in the energy storage industry.
The successful candidate will work closely with senior engineers and receive direct mentorship and technical guidance, particularly in software and control systems development. This role offers strong learning and growth opportunities within a fast-scaling, high-impact industry.
Key Responsibilities:
Design and Development
    • Support the design and development of control systems tailored for battery energy storage system (BESS) applications.
    • Assist in creating and implementing embedded software for seamless integration within electronic systems and control frameworks.

PLC Programming
    • Assist in developing, programming, and debugging PLC code using industry-standard languages such as ladder logic, function block diagrams, and structured text.
    • Support customization and configuration of PLC hardware and software to meet specific project requirements.
    • Assist in implementing and troubleshooting control strategies for various automated systems.
    • Demonstrated knowledge of Object-Oriented Programming (OOP) principles.
    • Exposure to CODESYS or similar IEC 61131-3 compliant development platforms.

HMI (Human-Machine Interface) Development
    • Support in designing user-friendly HMI interfaces for monitoring and controlling industrial processes.
    • Assist in integrating HMI systems with PLCs to provide real-time data visualization and operator interaction.

System Integration
    • Collaborate with cross-functional teams, including electrical and mechanical engineers, to integrate PLC systems for seamless BESS operations.
    • Ensure seamless communication between PLCs and other control devices, such as sensors, actuators, and SCADA systems.

Testing and Debugging
    • Conduct thorough testing of PLC programs to identify and resolve errors and anomalies.
    • Troubleshoot issues related to hardware, software, and communication protocols to ensure system reliability.

Documentation
    • Maintain detailed documentation of PLC programs, configurations, and system modifications.
    • Support creation of technical manuals and user guides for operators and maintenance personnel.

Upgrades and Maintenance
    • Stay updated with advancements in PLC technology and recommend hardware or software upgrades when necessary.
    • Perform routine maintenance and updates to PLC systems to ensure optimal performance and compliance with industry standards.

Safety and Compliance
    • Adhere to safety protocols and industry regulations when designing and implementing PLC systems.
    • Ensure systems meet relevant safety standards and conduct risk assessments as needed.

Training and Support
  • Provide training and support to operators, maintenance teams, and other stakeholders on the proper use and maintenance of PLC systems.

Continuous Improvement
    • Contribute to continuous improvement by staying at the forefront of technological advancements in electronics and automation.
    • Oversee the execution of complex engineering projects, ensuring timely delivery and adherence to quality standards.

Performance and Outcomes
    • Ensure measurable improvements in system efficiency through optimized control strategies and proactive maintenance.
    • Reduce downtime and enhance system reliability through rigorous testing protocols and troubleshooting.
ABOUT YOU
Qualifications & Experience
Required
    • Bachelor's degree in Electronics Engineering, Electrical Engineering, or a related field.
    • Skills in embedded software development and troubleshooting.
    • Strong analytical and problem-solving skills for testing, debugging, and optimizing electronic systems.
    • Familiarity with safety protocols and industry standards, such as IEC 61508 or equivalent.
    • Excellent documentation and communication skills.
    • Ability to collaborate effectively across disciplines and contribute to cross-functional teams.

Desired
    • Proven experience in PLC programming, HMI design, and system integration.
    • Experience in the utility, renewable energy, BESS (Battery Energy Storage Systems), or microgrid sectors.
    • Experience with energy management systems, IoT platforms, SCADA, or power systems software.
    • Exposure to regulatory frameworks and compliance relevant to energy markets (e.g., NEM, grid interconnection requirements).
    • Familiarity with business case development, product commercialization, and roadmap ownership.
    • MBA or further qualifications in product leadership, energy systems, or business management.

Technical Skills
Required
    • Understanding of modern software development practices (APIs, modular architectures, CI/CD, DevOps principles).
    • Ability to translate complex technical concepts into customer-aligned product outcomes.
    • Proficiency in backlog management tools (e.g., Jira, Confluence, Azure DevOps).
    • Knowledge of data-driven product decision-making (analytics, KPIs, user feedback loops).
    • Familiarity with Cloud-based platforms (e.g., AWS, Azure, GCP).

Desired
    • Knowledge of control systems, DER integration, or energy data protocols (e.g., Modbus, OPC-UA, IEEE standards).
    • Understanding of cybersecurity principles applicable to operational and energy systems.
    • Working knowledge of microservices architecture and scalability considerations.
    • Ability to interpret UX/UI best practices and collaborate with design teams.
    • Basic technical familiarity with APIs, SQL, Python, or energy simulation tools (not required for coding responsibilities).

Culture
  • To promote diversity and equality of opportunity in all EVO Power's work and practices.
  • To assist in building a staff culture where everyone is valued and equipped to do their job.
  • We are an equal opportunity employer and are committed to fostering an inclusive workplace.

Integrated Management System (IMS) Responsibilities
EVO Power is an ISO certified organization and has responsibilities to ensure ongoing adherence to our internal management systems. As the Control Systems Engineer within the organization the role is required to be responsible for fulfilling all applicable duties under EVO Power's Integrated Management System (IMS) to ensure compliance with ISO 9001:2015 (Quality Management Systems), ISO 14001:2015 (Environmental Management Systems), and ISO 45001:2018 (Occupational Health and Safety Management Systems).
These responsibilities include:
  • Compliance with EVO Power's IMS (ISO 9001, ISO 14001, and ISO 45001)
  • Support quality, safety, and environmental objectives • Identify and report risks, hazards, and non-conformities
  • Participate in continuous improvement of systems and processes
  • Maintain awareness of relevant policies and procedures
  • Adhere to EVO Power USA's Employee Handbook

Apply