OT Network Engineer / Consultant

Sword Group; Aberdeen City; On-site; GBP 60,000 - 80,000; Full time

Benefits offered by this job

Flexible working

Pension scheme

Private health

Job summary

Sword Group is seeking an OT Network Engineer/Consultant to design, implement and deliver secure network infrastructures for complex OT and industrial environments in Aberdeen. You will configure firewalls, VLANs and secure remote access while ensuring robust segmentation and security controls across IT and OT domains.

Candidates should have hands-on experience with enterprise and industrial networking, next-generation firewalls (Palo Alto, Fortinet, Cisco), and OT security frameworks such as

Qualifications

• Strong hands-on experience with enterprise and industrial networking.
• Knowledge of TCP/IP, VLANs, routing, switching, DNS and network services.
• Experience configuring and managing next-generation firewalls.
• Experience with Palo Alto, Fortinet, Cisco or Check Point.
• Strong understanding of firewall policies, NAT, VPNs, IPS/IDS and application-based security controls.
• Experience designing OT network segmentation and industrial DMZs.
• Experience with OT/IC environments and security frameworks (IEC 62443, NIST, Purdue model).

Responsibilities

• Design and implement secure OT and industrial network architectures.
• Configure and manage firewalls, switches, routers and secure remote access.
• Design network segmentation across IT, OT and safety-critical environments.
• Support DMZs, security zones and conduits.
• Configure VLANs, routing, access controls and security policies.
• Support firewall policy design and optimization.
• Ensure secure connectivity for OT applications and engineering systems.
• Collaborate with OT, cyber security, infrastructure and engineering teams.
• Produce network diagrams, test plans and as-built documentation.
• Provide guidance to clients on OT network security and resilience.

Skills

Enterprise networking

Industrial networks

TCP/IP

VLANs

Routing

Switching

Firewall management

Next-generation firewalls

Palo Alto

Fortinet

Cisco

OT security

IEC 62443

NIST

CCNA/CCNP

Tools

Wireshark

Job description

Sword is a leading provider of business technology solutions within the Energy, Public and Finance Sectors, driving transformational change within our clients. We use proven technology, specialist teams and domain expertise to build solid technical foundations across platforms, data, and business applications. We have a passion for using technology to solve business problems, working in partnership with our clients to help in achieving their goals.

About The Role

As the OT Network Engineer / Consultant, you will play a key role in the design, implementation and delivery of secure and resilient network infrastructure across complex OT and industrial environments.

As An OT Network Engineer / Consultant, You Will

• Design and implement secure OT and industrial network architectures
• Configure and manage firewalls, switches, routers and secure remote access solutions
• Design and implement network segmentation across IT, OT and safety-critical environments
• Support the deployment of industrial DMZs, security zones and conduits
• Configure VLANs, routing, access controls and network security policies
• Support firewall policy design, rule reviews and optimisation
• Implement secure connectivity for OT applications, servers, engineering workstations and industrial systems
• Support vendor and third-party network integration
• Support network migrations, upgrades and infrastructure refresh programmes
• Undertake network testing, validation and performance analysis
• Support FAT, SAT, commissioning and production go-live activities
• Troubleshoot complex network, connectivity and firewall issues
• Support network hardening, vulnerability remediation and security improvement activities
• Produce HLDs, LLDs, network diagrams, firewall rule sets, test plans and as-built documentation
• Work alongside OT, cyber security, infrastructure, application and engineering teams
• Provide technical consultancy and guidance to clients on OT network security and resilience

Requirements

You'll bring strong hands-on network engineering experience, with the technical capability to design, secure and support networks within complex OT and industrial environments.

• Strong hands-on experience with enterprise and industrial networking
• Strong knowledge of TCP/IP, VLANs, routing, switching, DNS and network services
• Experience configuring and managing next-generation firewalls
• Experience with platforms such as Palo Alto Networks, Fortinet, Cisco or Check Point
• Strong understanding of firewall policies, NAT, VPNs, IPS/IDS and application-based security controls
• Experience designing and implementing OT network segmentation and industrial DMZs
• Experience with Cisco switching and routing technologies
• Experience supporting secure remote access into OT environments
• Understanding of industrial protocols and OT network architectures
• Experience with network monitoring, packet analysis and troubleshooting tools
• Experience with high availability, redundant networking and resilient network architectures
• Experience with network device hardening and vulnerability remediation
• Experience supporting network integration, testing, validation and commissioning activities
• Experience producing technical network designs, diagrams, security documentation and test procedures
• Strong technical troubleshooting and problem-solving skills
• Confidence working directly with clients, vendors and technical stakeholders
• Experience within OT / ICs, industrial, energy, utilities or Critical National Infrastructure environments
• Knowledge of OT security principles and frameworks such as IEC 62443, Purdue Model, NCSC CAF or NIST
• Networking certifications such as CCNA or CCNP would be advantageous

Benefits

At Sword, our core values and culture are based on caring about our people, investing in training and career development, and building inclusive teams where we are all encouraged to contribute to achieve success. We offer comprehensive benefits designed to support your professional development and enhance your overall quality of life. In addition to a Competitive Salary, here's what you can expect as part of our benefits package:

• Personalised Career Development: We create a development plan customised to your goals and aspirations, with a range of learning and development opportunities within a culture that encourages growth.
• Flexible working: Flexible work arrangements to support your work-life balance. We can’t promise to always be able to meet every request, however, are keen to discuss your individual preferences to make it work where we can.
• A Fantastic Benefits Package: This includes generous annual leave allowance, enhanced family friendly benefits, pension scheme, access to private health, well-being, and insurance schemes.

At Sword we are dedicated to fostering a diverse and inclusive workplace and are proud to be an equal opportunities employer, ensuring that all applicants receive fair and equal consideration for employment, regardless of whether they meet every requirement. If you don’t tick all the boxes but feel you have some of the relevant skills and experience we’re looking for, please do consider applying and highlight your transferable skills and experience. We embrace diversity in all its forms, valuing individuals regardless of age, disability, gender identity or reassignment, marital or civil partner status, pregnancy or maternity status, race, colour, nationality, ethnic or national origin, religion or belief, sex, or sexual orientation. Your perspective and potential are important to us.