Internal Audit Assistant Manager

£55,000 - £60,000 DOE + benefits

Warwick, hybrid

At National Gas, the work we do matters.  

As Britain's national gas network, we help keep the lights on, businesses running, and homes warm by maintaining the critical infrastructure that transports gas across Great Britain. While providing the energy security Britain relies on today, we're also helping transform the network for a clean energy future. 

Join us and help secure Britain's energy. 

About the role:

As Internal Audit Assistant Manager you will contribute to the Internal Audit department’s strategy and be a key part of building its reputation of being a centre of excellence for best practice risk and controls advice.

Accountable for the end-to-end delivery of risk-based operational internal audits (and advisory reviews on an ad-hoc basis), providing independent assurance and insight to senior stakeholders.  Sets audit scope and approach, leads engagements (including co-source support), and signs off reports and conclusions in line with professional standards. Acts as trusted advisor to senior leaders and contributes to the Internal Audit strategy and plan.

Key accountabilities:

• Support the development of the annual audit risk assessment, working with senior management and the Head of Internal Audit to formulate the plan. Contribute to methodology and continuous improvement by championing professional standards and ethics. Align practice with the IIA Global Internal Audit Standards.

• Own the planning, fieldwork and reporting for a portfolio of risk-based audits (assurance and advisory), ensuring excellent quality, timeliness and impact whilst meeting the key KPIs governing the Audit Department.

• Set scope and approach of audits based on risk assessment and professional judgement. Ensure coverage and prioritisation of key risks and controls.

• Evaluate the design and operating effectiveness of business processes, identifying areas of non-adherence to standards and areas for improvement versus best practice.

• Use professional judgement to ensure all key risks have been identified and factored into the internal audit planning, and they are prioritised and covered in thorough testing.

• Lead teams (internal and external co-source). Review and approve work and conclusions.

• Continuously communicate with the Head of Internal Audit and engage with senior management to avoid surprises to ensure audit progression.

• Produce regular Status Documents for management and draft objective, independent Audit Reports that are clear and concise, using data, graphs and writing to communicate effectively. Provide innovative, value-added recommendations that resolve the audit observations having performed root cause analysis.

• Own and manage a portfolio of audit actions being worked on by business, ensuring you assess the effectiveness of activities undertaken to address the risks identified.

• Get involved in committees/ steering groups, becoming trusted advisor, and supporting the corporate governance requirements of the Company.

About you:

• Proven experience in internal audit delivery practices, internal control frameworks and risk management.

• Professional accounting/ auditing qualification (e.g. CIA, ACA, ACCA, CIMA, CIPFA).

• Ideally degree or equivalent level education in a relevant field

• Track record of managing projects

• Ability to develop and maintain a thorough knowledge of the business and regulatory environment.

• Highly competent in Microsoft Office (e.g. PowerPoint, Word, Outlook, PowerApps).

• Advanced Reporting writing and Excel skills necessary.

What we can offer you:

• Salary £55,000 - £60,000

• Market-leading double-match pension (for every £1 you add, we add £2)

• Annual performance bonus

• 26 days holiday plus 8 statutory days and option to buy 5 additional days

• 10x salary life assurance and income protection  

• Flexible opt-in salary sacrifice benefits including private healthcare, car, dental, and technology schemes

• Family-friendly policies, wellbeing support, and professional development opportunities

Inclusive recruitment:

We're building a workforce that reflects the communities we serve, championing diversity, and creating an inclusive workplace where everyone is valued for their unique contribution. We support reasonable adjustments throughout the recruitment process and beyond. 

National Gas is a Disability Confident employer and signatory of the Armed Forces Covenant. 

 #LI-PT1 #LI-Hybrid 

Further information:

• There will be occasional travel in this role – estimated travel up to 10% within the UK (driving licence required)

• Advert close: 4th October 2026

• Interviews: 12th October 2026