5 Best Plant System Integrators for Large-Scale Manufacturing

Scaling automation across an entire facility involves more than installing new equipment. While new machines can improve output, they must also work seamlessly with existing controls, data systems and workflows. Without the right expertise, even the most advanced technology can create new inefficiencies instead of solving old ones.

That’s why finding experienced providers is crucial. They coordinate across departments, connect legacy and novel infrastructure, and help modernize the floor without disrupting production. If you’re planning to automate soon, here are the best plant system integrators for large-scale manufacturing to help you drive measurable performance and make sure your systems are ready for future growth.

1. Malisko

Malisko is a U.S.-based systems integrator with more than 30 years of experience helping manufacturers modernize and implement Industrial Internet of Things (IIoT) solutions across large facilities. Founded in 1994, the company has built a multidisciplinary engineering team focused on plant-floor controls, process automation, industrial networking, cybersecurity, data visualization and enterprisewide integration, spanning SCADA, MES, ERP and cloud platforms. Control Engineering has recognized Malisko as System Integrator of the Year three times.

The company has successfully executed large-scale modernization projects across industries. In one enterprise network upgrade, Malisko migrated previously siloed devices to a secure IT/OT-converged infrastructure with minimal downtime. This resulted in real-time data visibility and scalable automation that considers future expansions. These advantages position Malisko as one of the best plant system integrators for large-scale manufacturing.

Malisko’s expertise is particularly relevant to food and beverage, life sciences, pharmaceuticals, specialty chemicals and consumer packaged goods. Its portfolio ranges from breweries and dairies to multiproduct process plants, demonstrating flexibility in both batch and continuous operations. By combining technical depth with real-world industry experience, Malisko delivers measurable efficiency gains, enhanced traceability and compliance assurance.

2. RoviSys

RoviSys ranks among the largest system integrators in the world, placing second on the 2026 System Integrator Giants list based on revenue. Founded in 1989, the privately held firm employs more than 1,000 engineers across North America, Europe and Asia-Pacific.

What makes RoviSys a standout is its vendor-neutral approach, meaning it isn’t tied to a single automation platform or OEM ecosystem. Instead, it takes a close look at your existing plant infrastructure and carefully selects the best-fit technologies to match your process, budget and performance goals. It’s a Rockwell Automation Recognized SI Partner at the Platinum level, an Inductive Automation Premier Integrator and a COPA-DATA Gold Partner. Its experience spans PLC/DCS framework, SCADA, MES and industrial cybersecurity architectures.

The company serves highly regulated and high-reliability sectors, including life sciences, chemicals, power and energy, metals and data centers. Beyond core control integration, RoviSys delivers modernization and digital transformation programs that incorporate industrial AI, secure network design and cloud-enabled data strategies. These solutions help clients stay compliant with strict regulations, maintain continuous operations and reduce downtime.

3. Prime Controls

Prime Controls is a seasoned industrial automation integrator and I&C construction firm founded in 1991. It ranks among the giants and is a certified member of the Control Systems Integrators Association.

Working with it means you get a provider that manages the entire project life cycle, from initial design and construction to installation. This comprehensive approach makes it a go-to for semiconductor fabs, utilities and metal processing facilities. It offers specialized solutions, including metal-forming and can-making sensors, high-speed leak testers and other equipment designed for fast, high-volume production lines. Prime Controls also has deep experience in clean-room environments, facility monitoring and control, life-safety and critical HVAC systems for semiconductor fabrication.

With its proven technical expertise, financial reliability and 24/7 support, Prime Controls keeps complex, multi-million-dollar operations running safely and efficiently. The result is reduced downtime, smoother operations and confidence that your critical systems are in expert hands, from start to finish.

4. ANDRITZ

ANDRITZ is a global industrial technology leader with nearly 30,000 employees and over 280 locations in more than 80 countries. It offers plant automation systems and digital solutions for process industries, including pulp and paper, metals, mining, energy, chemicals, feed and biofuels. It delivers turnkey services, so you don’t have to juggle multiple vendors or worry about gaps between design, installation and operation. It handles everything from engineering and controls design to project management, system setup, operator training and ongoing maintenance.

Central to its offering is the proprietary Metris All‑in‑One IIoT platform, which combines distributed control (DCS), condition monitoring, advanced analytics, asset performance and production optimization in a single, vendor‑neutral environment. What’s really a standout is that the advanced simulation and process optimization tools let you create digital models of your operations. You can safely test changes like adjusting speeds or modifying chemical mixes without stopping actual production, so there’s less trial-and-error on the shop floor.

The provider is also an excellent choice for sustainability-focused companies, as it emphasizes energy efficiency and waste reduction in daily operations. If you’re looking for a long-term partner, ANDRITZ offers reliable support for years, not just during the initial installation.

5. Quad Plus

Quad Plus is a U.S.‑headquartered industrial automation and electrical engineering firm founded in 1990. Its team of roughly 200 to 500 engineers and specialists delivers turnkey control system integration and power services across the full project life cycle. Companies can expect services like design and engineering, fabrication, commissioning, training and ongoing support. Many of its engineers bring deep process experience, allowing Quad Plus to adapt legacy tools, retrofit obsolete equipment and solve complex challenges for clients.

Quad Plus supports a wide range of industries, including metals, converting, building products, pulp and paper, rubber and plastics, cement and mining, utilities, data centers and marine. Its capabilities cover PLC, HMI and SCADA integration, as well as medium‑voltage systems, motion control, drives and coordinated automation. The company uses 3D design and packaging tools alongside AutoCAD and EPLAN workflows. Extensive testing ensures correct installation and helps reduce commissioning time.

The company’s life cycle expertise spans professional engineering, architecture design, retrofits, remote diagnostics and field support. These services help clients improve reliability, reduce downtime and extend equipment life. Quad Plus also enhances production performance with secure, scalable, vendor‑neutral solutions that are tailored to each client’s processes.

Overview of the Best Plant System Integrators for Large-Scale Manufacturing

Here’s a quick look at how the top plant system integrators stack up, highlighting their expertise, industries served and the unique capabilities that make them stand out in large-scale manufacturing

Partner Smart With the Right Integrator

Whatever your goal — bridging silos, modernizing operations or scaling automation — your vision can only be realized with the right provider. The best plant system integrator for large-scale manufacturing is one who truly understands your industry, anticipates challenges and delivers solutions for even the most complex issues. This way, you ensure your upgrades help your plant run efficiently today and are ready for future expansions.