Company: Nomios
Location: Basingstoke
Posted: May 14th, 2026
Nomios' mission is to build a ‘secure and connected’ future, focusing on delivering top-tier cyber security services to our customers. Organisations across the globe depend on us to secure their digital infrastructures.
In support of our continued growth, we are seeking a Accounts Payable Assistant to join our team to own day-to-day financial administration processing activities. This role offers an exciting opportunity for a high-potential, energetic, and dedicated individual looking to advance their career within a company poised for sustained growth in the years to come.
Your role as Accounts Payable Assistant
This is a hands-on finance operations role focused on keeping day-to-day processing running smoothly and accurately. You will take ownership of accounts payable and expenses processing (including the full process, from processing invoices to payment), and you will support the wider finance team by maintaining a clear audit trail and strong financial controls.
Alongside accounts payable and expenses, you will provide broader support across finance operations, including elements of accounts receivable administration and banking activity.
This role is not responsible for producing statutory accounts or owning the full month-end close; instead, you will provide high-quality processing support, escalate exceptions, and help the Finance Director and wider team by ensuring information is complete, compliant and on time. You will also support continuous improvement by spotting recurring issues, suggesting practical fixes, helping document processes, and supporting testing/training when workflows or systems change.
Responsibilities
The Nomios UK&I Accounts Payable Assistant helps keep day-to-day finance operations running smoothly, accurately, and in line with internal controls, with a focus on accounts payable and expenses.
Key responsibilities include:
Accounts Payable (AP): receive and process supplier invoices; validate required back-up (e.g., PO/approval/receipt where applicable); code accurately; resolve queries; and ensure timely posting.
Expenses: process employee expense claims in line with policy; check completeness/receipts; follow up on missing information; and ensure correct coding and approvals.
Supplier & master data: maintain accurate supplier records (including payment details); support supplier set-up/changes in line with controls; and maintain a clear audit trail for updates.
Payment run support: prepare payment runs for review/approval (including proposed payment lists, supporting documentation and exception notes) and coordinate timely query resolution with internal stakeholders and suppliers.
Accounts Receivable (AR): support the AR process by ensuring accurate and timely posting of sales invoices into the accounting system, in coordination with the Sales Operations team.
Close support (banking & month-end): post bank transactions and support bank reconciliations by matching items and escalating exceptions; assist with month-end activities as required.
Controls, compliance & audit readiness: follow delegation of authority and payment approval controls; ensure documentation is complete and retained; and support internal/external audit requests.
Continuous improvement: identify recurring issues (e.g., late approvals, missing POs, coding errors); propose practical improvements; help document procedures; and support testing/training when processes or systems change.
AAT-qualified (or studying) and/or equivalent practical experience in a finance assistant / finance operations role.
Proven experience in accounts payable and/or expenses processing, including query resolution and approval chasing.
Good working knowledge of finance processes, reconciliations support, and the importance of financial controls and audit trail.
Strong Excel skills and confidence working with finance systems and data.
Highly organised with the ability to manage a busy workload, prioritise deadlines, and maintain attention to detail.
Confident communicator with the ability to build strong working relationships across the business and with suppliers.
Reliable and proactive, with a can-do attitude; comfortable following defined processes and suggesting practical improvements.
Nice to have: experience supporting month-end close and/or bank reconciliations.
Job Specifics
Location: This role is based at our Basingstoke office, with flexibility for occasional home-working by agreement (free hot & cold drinks, breakfast items, snacks, lunches, and regular takeaway Fridays are provided to all staff in the office!).
Hours: Full-time, Monday-Friday, 9:00am-5:30pm.
Travel: Occasional travel may be required to other Nomios offices in Europe.
Why would you choose to come and work with us?
You will get to work in a dynamic, fast-paced environment where you are free to use your initiative in support of our strategic objectives. You will work alongside high calibre sales, technical, and operational experts as part of a supportive, tight-knit team, within which every individual has an important part to play and makes a real difference. Nomios offers a highly competitive salary and commission scheme along with industry-leading benefits.
Nomios is an equal opportunity employer and is committed to creating and sustaining an environment in which everyone is provided with an equal opportunity to grow and develop, and no individual will be unjustly discriminated against. This includes, but is not limited to, discrimination because of age, disability, gender reassignment, marriage and civil partnership, pregnancy and maternity, race, religion and belief, sex and sexual orientation.