Principal Control Systems Engineer

iO Associates; Greater London; On-site; GBP 50,000 - 70,000; Full time

Job summary

A leading engineering consultancy in the UK is seeking a Principal Control Systems Engineer. This role involves developing innovative control solutions for national security projects, requiring expertise in PLC systems, strong communication skills, and the ability to meet strict regulations. Ideal candidates will have significant experience in defence or regulated industries. Enjoy flexible working arrangements and comprehensive benefits.

Benefits

Flexible working arrangements

Comprehensive benefits

Opportunities for training and professional development

Qualifications

• Minimum of five years' practical experience in a control systems engineering environment.
• Strong knowledge of testing, commissioning, and system validation processes.
• Experience working within defence, maritime, aerospace, or similarly regulated sectors.

Responsibilities

• Gather and interpret client requirements to inform system design.
• Design, specify, and rigorously test PLC control systems tailored to complex naval applications.
• Manage seamless data communication interfaces with third-party equipment.

Skills

Designing large-scale PLC control systems based on Siemens S7-300 / 400 platforms

Fault-tolerant, high-availability, and safety-critical PLC solutions

Industrial communication protocols (Profibus, Profinet, EtherNet/IP)

SCADA/PLC interfacing and driver configuration

Testing, commissioning, and system validation processes

Education

Electrical / Electronic Engineering, C&I or Systems Engineering

Job description

Join Our Client as a Principal Control Systems Engineer (Perm / Fixed Term)

Are you a seasoned control systems professional with a passion for innovation and a background in defence or highly regulated industries?

An exciting opportunity awaits to become a key contributor within a leading organisation dedicated to delivering advanced naval platform management solutions.

Our Client is recognised globally for pioneering technology and delivering mission-critical systems that support national security and maritime excellence. They foster a collaborative and inclusive culture that values expertise, creativity, and continuous professional growth. Working here means being part of a team committed to shaping the future of defence technology while enjoying comprehensive benefits, flexible working arrangements, and a dedicated focus on your development.

Role Overview

The organisation is expanding its defence and naval systems division, reflecting a strategic boost in capabilities. This pivotal role offers the chance to influence cutting‑edge control system infrastructure integrated into the UK submarine fleet. It's an excellent fit for engineers eager to make a substantial impact on national security through innovative control solutions that meet strict safety and security standards.

Key Responsibilities

• Gather and interpret client requirements to inform system design.
• Produce detailed technical documentation in line with organisational and client standards.
• Design, specify, and rigorously test PLC control systems tailored to complex naval applications.
• Manage seamless data communication interfaces with third‑party equipment.
• Develop PLC software using various design formats, including block diagrams and pseudocode.
• Conduct thorough analysis and testing to validate software functionality.
• Assist with contractual change requests and project proposals.
• Ensure compliance with all relevant safety, security, and statutory regulations.
• Participate actively in project meetings and team briefings.
• Undertake additional responsibilities as directed to support project success.

Essential Skills and Experience

• Proven expertise in designing large‑scale PLC control systems based on Siemens S7‑300 / 400 platforms.
• Demonstrable experience with fault‑tolerant, high‑availability, and safety‑critical PLC solutions.
• Proficiency in industrial communication protocols such as Profibus, Profinet, EtherNet / IP, ModBus, TCP / IP, UDP, and ASCII.
• Solid understanding of SCADA / PLC interfacing and driver configuration.
• Minimum of five years' practical experience in a control systems engineering environment.
• Strong knowledge of testing, commissioning, and system validation processes.
• Educational background in Electrical / Electronic Engineering, C&I or Systems Engineering.
• Experience working within defence, maritime, aerospace, or similarly regulated sectors.

Preferred Additional Skills

• Exceptional ability to produce clear, comprehensive technical documentation.
• Knowledge of software development lifecycles and industry best practices.
• Awareness of cybersecurity considerations specific to industrial control systems.
• Familiarity with resilient communication networks and fault‑tolerant system architectures.

Security and Eligibility

Applicants must be able to obtain and maintain UK Government security clearance (SC). Our team is ready to guide you through the clearance process and answer any questions you may have.

Why Join Our Client?

• Play a vital role in developing and maintaining secure, high‑performance control systems for some of the UK's most advanced naval platforms.
• Contribute to nationally significant projects impacting maritime security and technology.
• Enjoy opportunities for training, professional development, and advancement within a supportive environment.
• Be part of a forward‑thinking organisation that values innovation, diversity, and inclusivity.

Application Process

If you are an experienced control systems engineer ready to take on the challenges of a regulated defence environment, we would love to hear from you. Please submit your CV for review, and our recruitment team will be in touch shortly.

For further information or to discuss your suitability for this role, contact us via email.

Diverse candidates are encouraged to apply. Our Client is committed to creating an inclusive workplace where everyone can thrive.