Transactional Services Assistant

Powered by Water, Driven by Purpose

South West Water keeps the South West flowing with safe, reliable drinking water and wastewater services across some of the UK’s most stunning landscapes.

We’re proud to be part of Pennon Group, a leader in the UK water sector, working towards a greener future. Our goals? As well as lowering our carbon footprint, we’re working with partners to plant 300,000 trees, restore peatlands and supporting farmers and landowners to improve water quality and wildlife.

Whether you’re starting out or seeking a new challenge, our scale and ambition create opportunities for you to shape your own career.

Ready to make a splash? Join our team today.

Join Our Finance Team

We're looking for a highly organised and detail-oriented Transactional Services Assistant to join our friendly and collaborative Finance team.

This is an excellent opportunity for someone who enjoys administration, customer service, and working with financial processes. Whether you already have experience in a finance environment or are looking to develop your skills within a supportive team, this role offers exposure to a broad range of transactional finance activities and the opportunity to build valuable knowledge across Accounts Payable, Sales Ledger, and wider Finance operations.

What you'll be doing:

As a Transactional Services Assistant, you'll play a key role in ensuring the smooth and timely operation of our financial processes. Your responsibilities will include:

• Processing invoices and supporting documentation through our financial systems.

• Scanning, validating, and entering invoice information accurately.

• Handling supplier and customer queries via telephone, email, and correspondence.

• Supporting internal teams with payment and supplier-related enquiries.

• Creating invoices, credit notes, and financial postings within our finance systems.

• Processing customer card payments and maintaining accurate records.

• Assisting with journal preparation and posting.

• Supporting reconciliations and helping investigate discrepancies.

• Providing administrative support across the Transactional Services function.

• Working collaboratively within a small team to deliver excellent service to the business.

What we are looking for:

Essential

• GCSE Grade C/4 or above in English and Maths (or equivalent).

• Experience using Microsoft Office applications, particularly Excel and Outlook.

• Excellent organisational skills and the ability to prioritise workloads effectively.

• Strong attention to detail and a commitment to accuracy.

• Excellent verbal and written communication skills.

• Ability to build positive working relationships with internal and external stakeholders.

• A proactive and flexible approach to work.

• Ability to work both independently and as part of a team.

Desirable

• Experience working within a finance or business administration environment.

• Knowledge of Ellipse or a similar financial/accounting system.

• Understanding of Accounts Payable, Sales Ledger, or transactional finance processes.

Why Join Us?

This role offers a fantastic opportunity to gain hands-on experience across a variety of finance functions while working within a supportive and collaborative team. You'll develop valuable financial and business skills, gain exposure to wider Finance activities, and contribute directly to delivering a high-quality service across the organisation.

• Generous holiday allowance + bank holidays

• Discretionary bonus

• Competitive contributory pension

• Share-save scheme

• Health benefits & wellbeing support programmes

• Group discounts

• Cycle to Work scheme

• Financial support services

• Development and training opportunities
  … and much more!

Closing Date: 1st September 2026

We may close this vacancy early if we receive a high volume of applications. We encourage you to apply as soon as possible.

Please note that the successful candidate will be subject to a mandatory DBS check as part of the onboarding process.

Be yourself, we like it that way. Together, we will build a culture of belonging, where inclusion is instinctive. Diversity is our strength and a reflection of our communities. We care, we value everyone, we celebrate uniqueness.

Our core values, which are essential to our success, are:

Be Rock Solid - Build trust and be trusted. Be the one we all look to and can depend on.

Be You - We want you to bring your best everyday. Be yourself and make your mark in your individual way.

Be the Future - Embrace change. Drive Progress. Own the challenge.