Job Description

Working at NSG

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NSG Environmental Ltd has been delivering work programmes in the nuclear industry for over 40 years. Traditionally in the areas of decommissioning and waste management, NSG now has a broad customer base and provides a wide spectrum of services across the nuclear project lifecycle, ranging from expert consultancy support, R&D and engineering design to rekit and refurbishment, site installation services and high-hazard physical decommissioning works, amongst others. This work is delivered at NSG's own offices and purpose-built facilities and nuclear sites across the UK. The delivery and management of these projects and programmes of work is carried out by a skilled workforce composed of both white-collar and blue-collar personnel in technical, administrative, and physical roles.

Our core values of Passion, Integrity, Challenge and Collaboration drive performance and ensure we add significant value. If joining us as a member of staff, we will support your professional development in an exciting and challenging work environment that will enable you to use, develop and hone your technical expertise in a supportive and collaborative working environment.

The Role

The Transactional Team Leader will oversee the day-to-day operation of accounts receivable, accounts payable, credit card, and petty cash processes. They will uphold and drive accurate and timely processing of sales invoicing, credit control, requisitions, purchase orders, goods receipting, invoice matching, and supplier payments.

With a small number of customers and concentrated client base, sales processing and credit control requirements are relatively simple. However, the Team Leader will still ensure transactions are processed correctly, balances are monitored, and issues are resolved promptly to support timely cash collection and accurate reporting whilst driving improved efficiency in this area.

Leading a small team, initially of three, the Team Leader will allocate workload, provide coaching, strengthen controls, improve efficiency, and ensure a consistent, high-quality service. They will champion best practice, build capability, and support a proactive, service-focused culture.

Working closely with the Procurement Department, the Team Leader will help maintain strong purchasing discipline across the organisation. They will act as the first point of escalation for internal teams and suppliers, resolving disputes quickly and reducing aged creditor items so we maintain strong payment practise standards.

A key focus of the role is improving process efficiency, data quality, behaviours and compliance across the P2P cycle. The Team Leader will monitor KPIs, reduce exceptions and disputes, and support a clean month-end close through effective GRNI management, strong controls and accurate cut-off. They will produce insight into root causes, highlight trends and identify opportunities for improvement which can be rolled out and implemented by operational teams. The Team Leader will support improved visibility of process performance through clear reporting and dashboard insights, helping Finance and Procurement make data-led decisions

The role also plays a key part in strengthening financial governance and ensuring policies are consistently applied across the Group. The Team Leader will build strong relationships across Finance, Procurement, Operations and Site teams, supporting a collaborative service culture and becoming a trusted partner to the business.

This is a new role that enables Finance to deliver strategic aims and strengthen the end-to-end sales and purchasing process across the business. The Team Leader will have close support from the Group Financial Controller but will have clear scope to take ownership, drive meaningful improvements, and shape how the transactional finance function operates going forward.

Key Objectives

- Transactional Ownership

: Take ownership of routine transactional delivery across both purchase ledger and sales. Ensure purchase orders, goods receipting, invoice matching and payment preparation are completed accurately and to agreed timeframes, stepping into activity where required to maintain workflow and good service levels.

- Sales Processing and Credit Control

: Ensure sales transactions are processed correctly and debtor balances monitored. Given the small number of concentrated customer accounts, maintain simple but effective credit control routines. Act promptly to resolve delays or discrepancies and support strong cashflow discipline.

- Supplier Master Data

: Maintain clean and controlled vendor records, verifying bank detail changes, performing compliance checks and preventing duplications or fraud risks.

- Credit Cards and Petty Cash Management

: Oversee the administration, reconciliation, and control of company credit card spend and petty cash. Ensure transactions comply with company policy, supporting documentation is complete and exceptions are investigated and resolved in a timely and transparent manner.

- Mailbox Rota / Service Standards

: Coordinate the shared inbox rota, triage queries, and ensure response and resolution SLAs are met. Escalate early where bottlenecks or approval delays arise.

- Team Leadership and Development

: Allocate workload, support team members, and provide coaching on good practice. Build resilience through cross-training, promote accountability, and lead by example, particularly during peak periods or when addressing complex queries.

- Behavioural Improvement and Process Efficiency

: Monitor KPIs and identify the root causes of recurring issues such as mismatches, missing GRNs, late approvals or incomplete information. Influence behaviours to strengthen purchasing discipline, reduce disputes, and drive cleaner data and faster cycle times.

- Reporting, Insight & Dashboard Development

: Support the development, maintenance and publication of dashboards and reporting that provide visibility over P2P performance from a purchase ledger perspective. Use insight to highlight trends, pinpoint risks, and inform behavioural or process improvements across the business.

- Dispute Resolution

: Act as the first escalation point for internal queries and supplier disputes. Drive reductions in overdue aged creditor items, particularly those aged over 61 days. Help build confidence through timely resolution and clear communication.

- Month-End and Audit Support

: Support month-end activity by contributing to GRNI review, accruals, cut-off accuracy and reconciliation work. Maintain transparent records and respond to audit requests accurately and efficiently.

- Contribution to Improvement and Change Projects

: Actively contribute to broader improvement initiatives, including expenses process enhancements, the exploration of petty-cash alternatives, automation opportunities, and systems development. Challenge legacy practices and help embed a continuous-improvement mindset across the function.

QSHEW

The Company operates a QSHEW system to manage quality, health and safety and the environment. It is your responsibility to ensure all personal actions, and that all members of the support services team comply with the QSHEW system but specifically:

be aware of NSG's QSHEW policies & procedures which apply to your area of work conform to the QSHEW system assist NSG in operating the QSHEW system co-operate and assist during any audit

Qualifications

Good standard of education (GCSE or equivalent, including Maths & English) - Essential. AAT Level 3 or above, or equivalent bookkeeping Qualification - Desirable. Training in lean/process improvement or internal Controls - Desirable. IOSH Managing Safely or Level 2 Health & Safety in the Workplace or equivalent - Relant training will be provided if needed.

Experience & Knowledge

Supervision of an AP/purchase ledger team with direct reports - Essential. End-to-end P2P: PO, receipting/GRN, matching, invoice workflow and payment runs - Essential Experience improving Month-end: GRNI review and reducing cut-off - Essential. Dispute resolution with suppliers & stakeholders. Confident escalation - Essential. Strong Excel (lookups/XLOOKUP, pivots); comfortable with data quality - Essential. Strong understanding of VAT on AP (incl. self-billing/reverse charge as applicable) - Essential. Full understanding of Credit card and petty cash administration, reconciliation & policy compliance - Essential. Experience of running a shared mailbox rota and AP helpdesk SLAs - Essential. Experience of working with Procurement on Improvements, catalogues and preferred suppliers - Desirable. Experience of using expenses systems and both manual invoicing and e-invoicing/OCR workflows - Desirable. Used to dealing with confidential and commercial information - Desirable. Familiar with QSHEW operating procedures and requirements etc - Desirable.

Skills & Attributes

Strong IT skills, including MS Excel. Competent user of MS Office - Essential Can prioritise and get hands dirty to clear bottlenecks - Essential. Sets/monitors KPIs; turns insight into action - Essential. Clear written & verbal communication, steady with challenging conversations Organised, methodical, strong attention to detail and control mindset - Essential. Trains, coaches and cross-trains to remove single-point-of-failure risk (SOP's). Comfortable improving SOPs and documenting processes - Essential. Ability to learn and navigate finance systems quickly - Essential. Database/records maintenance - Essential.

Personal Attributes

Positive, proactive attitude with willingness to take ownership. Someone who owns the outcome - Essential. Calm under pressure, professional, collaborative and solutions-focused approach - Essential. Team player, supportive and approachable - Essential. Discreet with confidential/commercial info - integrity first - Essential Driven to improve processes and support team efficiency. Be a pragmatic change-agent, balancing control with outcomes - Essential. Due regard to equal opportunities and diversity at all times, and to work in a fair and reasonable manner towards all stakeholders - Essential. Commitment to and understanding of NSG's Vision, Mission and Values - Essential.

Package - Staff only

Hours - 37.5 hours per week

Life Assurance 3x Salary

Private Healthcare package

Pension - Company contributes 5% Individual contributes 4%

Discretionary bonus

187.5 hours per year holiday allowance

Professional memberships covered

Training and development opportunities available.

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NSG Environmental are a Disability Confident Committed Employer

Job Types: Full-time, Permanent

Pay: 45,000.00-50,000.00 per year

Application question(s):

Do you have an AAT Level 3 or above, or equivalent bookkeeping qualification? Do you have relevant experience?
Work Location: In person