Senior Network & Cyber Security Engineer

Orion Group; Greater London; Hybrid; GBP 100,000 - 125,000; Full time

Job summary

A leading energy consulting firm is seeking a Senior Network & Cyber Security Engineer to enhance secure operational technology environments. This hybrid position requires a degree and expertise in network architectures and cyber security practices, offering flexible working and a competitive benefits package including generous leave and medical cover.

Benefits

33 days annual leave

Private medical cover

Life insurance

Generous pension

Monthly flex days

Customisable benefits platform

Ongoing professional development

Qualifications

• Professional certifications like CCNA, CCNP or GICSP are highly desirable.
• Strong background in designing secure OT environments and cyber-secure solutions.
• Familiarity with telecoms, satellite, and radio-link technologies is desirable.

Responsibilities

• Design and implement secure network architectures for control systems.
• Conduct cyber risk assessments and vulnerability scans.
• Provide subject matter expertise in OT protocols and security implications.

Skills

OT Network Design

Cyber Security Engineering

Vulnerability Assessments

Knowledge of Protocols (Modbus, OPC, DNP3)

Education

Degree in relevant technical discipline

Tools

Intrusion Detection Systems

Control System Platforms (Rockwell, Honeywell)

Job description

Senior Network & Cyber Security Engineer
Location: Hybrid (Aberdeen, Staines, or Glasgow)
Industry: Energy / Automation / Digital Transformation
Clearance Requirement: Must be eligible to pass HMG Baseline Personnel Security Standard (BPSS)
Type: Full-time, Permanent

Overview
Our client, a trusted name in designing and advancing critical infrastructure across the energy sector, is seeking a Senior Network & Cyber Security Engineer to join their Systems Integration team within their growing Digital Consulting division. This is a fantastic opportunity to work on high-impact projects, helping build and secure the future of automation and control systems.

This hybrid role offers flexibility and the chance to work from one of three UK offices - Aberdeen, Staines, or Glasgow - with occasional travel required.

The Opportunity
As a Senior Network & Cyber Security Engineer, you'll be instrumental in shaping secure operational technology (OT) environments. You'll assess and improve the robustness of network architectures, conduct vulnerability assessments, and support the design and implementation of cyber-secure solutions for automation and control systems.

You'll work within a team responsible for delivering complex digital solutions that enable safer and more efficient operations across the energy landscape.

Key Responsibilities

• Design and implement secure network architectures tailored to control systems and automation solutions.
• Conduct cyber risk assessments and vulnerability scans of client environments.
• Develop technical documentation including detailed network diagrams, IP schedules, and test procedures.
• Produce material requisitions, contribute to technical bid evaluations, and review vendor documentation.
• Provide subject matter expertise in protocols such as Modbus, OPC, and DNP3, understanding their security implications.
• Apply industry standards including IEC 62443 and IEC 27001/2.
• Stay current with cyber threat intelligence, emerging technologies, and regulatory trends.
• Collaborate with multidisciplinary teams to ensure integrated, secure, and compliant system designs.
• Evaluate existing client infrastructures and offer practical improvements to enhance resilience and compliance.

What You Bring

• Degree in a relevant technical discipline or equivalent hands-on experience.
• Professional certifications such as CCNA, CCNP, CWNP, ISA/IEC 62443, or GICSP (highly desirable).
• Strong background in OT Network Design and Cyber Security Engineering.
• Familiarity with OT security tools, intrusion detection systems, and control system platforms (Rockwell, Honeywell, Schneider).
• Good working knowledge of telecom, satellite, and radio-link technologies (desirable).
• Strong understanding of safety, security, and operational standards across automation and control systems.

Why Apply?
Our client offers:

• A chance to work on meaningful, cutting-edge projects across high-profile energy organisations.
• Flexible working arrangements with hybrid and remote options.
• Competitive salary and benefits package including 33 days annual leave (inclusive of public holidays), private medical cover, life insurance, and a generous pension.
• Monthly "flex days" and a fully customisable benefits platform.
• Access to a global team of subject matter experts and ongoing professional development through tailored learning and mentoring programmes.
• An inclusive culture and a long-term commitment to diversity and innovation.
• A unique opportunity to contribute to the energy transition and support clients in building secure, digital ecosystems.

Our role in supporting diversity and inclusion
As an international workforce business, we are committed to sourcing personnel that reflects the diversity and values of our client base but also that of Orion Group. We welcome the wide range of experiences and viewpoints that potential workers bring to our business and our clients, including those based on nationality, gender, culture, educational and professional backgrounds, race, ethnicity, sexual orientation, gender identity and expression, disability, and age differences, job classification and religion. In our inclusive workplace, regardless of your employment status as staff or contract, everyone is assured the right of equitable, fair and respectful treatment.