Design Assurance Engineer

Contribute to and/or review High-Level Design (HLD) and Low-Level Design (LLD) documentation for OT and converged OT/IT solutions, ensuring alignment with security, operational, and regulatory requirements.

Ensure designs are technically robust, implementable, and compliant with standards including IEC 62443, NIS Regulations, CAF, and ISO 27001.

Support implementation, testing, commissioning, and deployment activities.

Validate requirements relating to: Network segmentation Secure remote access Identity and access management Monitoring and MDR integration Resilience and recoverability

Network segmentation

Secure remote access

Identity and access management

Monitoring and MDR integration

Resilience and recoverability

Support remediation, troubleshooting, and technical assurance activities throughout delivery.

Support ongoing operational assurance activities across live OT environments and managed services.

Contribute to vulnerability management, change assessment, monitoring, and cyber improvement activities.

Support OT MDR assurance and operational resilience activities.

Ensure continued alignment to customer, operational, and regulatory requirements.

Conduct cyber security and design risk assessments across project and operational environments.

Support compliance with NIS Regulations, NCSC CAF, sector-specific requirements, and internal governance frameworks.

Maintain risk registers and remediation tracking activities.

Support audits, assurance reviews, and compliance evidence generation.

Participate in technical governance, design reviews, and assurance forums.

Work collaboratively with engineering, cyber security, service, operational, and customer teams.

Act as a trusted advisor on OT cyber security, resilience, and design assurance.

Support customer meetings, workshops, and technical governance forums.

Build strong working relationships with customers, vendors, and internal stakeholders.

Provide technical guidance and mentoring where required.

Produce and maintain technical documentation including: Assurance reports Risk assessments Compliance evidence Technical standards and procedures Design and review documentation

Assurance reports

Risk assessments

Compliance evidence

Technical standards and procedures

Design and review documentation

Maintain accurate project and assurance records.

Present technical findings, risks, and recommendations to internal and customer stakeholders.

The successful candidate will have a highly professional approach and good presentation skills, and experience of working with demanding customers within the CNI/OES sectors.

Excellent communication skills interfacing at all levels up to Director both internal and external.

Self-motivated, results-oriented with a positive outlook.

Ability to work well undirected, using own initiative with self confidence in decision making.

A clear focus on high quality work and excellent customer service.

Strong analytical and critical thinking skills.

Ability to challenge designs constructively.

Excellent communication and stakeholder engagement.

Attention to detail and governance mindset.

Experience in critical infrastructure sectors (energy, water, transport, etc.).

Exposure to safety-critical environments and/or within regulated industries.

Familiarity with contractual management.

Experience supporting or contributing to technical governance, assurance frameworks, or review boards.

Experience in developing OT security and design assurance strategies.

Our people are what makes Exponential-e Group the company it is today. This year’s employee survey highlighted that 81% of employees who took the survey, would recommend a friend to work for our organisation.

Learning and development are fundamental parts of daily life at Exponential-e. From their first day at the company, everyone is provided ample opportunities to develop their skills and broaden their horizons, with our own L&D team running a range of bespoke courses, based on the latest innovations and challenges across the digital landscape.

Exponential-e Group is committed to providing equal opportunities in employment and treating all employees with respect and dignity. The company respects and values the diversity of its staff, striving to maintain an environment where there is opportunity for everyone to feel valued, their talents to be utilised and for both personal and organisational aspirations to be met. Every employee plays a vital role in helping to create an inclusive working environment by understanding and harnessing difference in a positive way.