Billing Specialist in Lisburn

About Us

3173 is a privately owned UK firm of pensions experts with clients throughout the UK, serviced from offices in London, Belfast, Glasgow, Manchester, Birmingham, Bristol and Leeds. The 3173 Group of companies includes Dalriada Trustees Limited (Dalriada), one of the UKs largest professional pension scheme trustee companies. Spence & Partners provides full pension actuarial, consulting, investment consulting and administration services that provide simply smarter solutions for trustees, employers and members, and Mantle reimagines the traditional models of defined benefit pensions administration and actuarial valuation software.

This role sits within the Belfast based finance team and supports the group of businesses across the UK. The Billing Specialist will report directly to the Group Financial Controller and work closely with operational teams, project managers, and the wider finance function. The role includes credit control and the successful applicant will be expected to identify, monitor and follow-up unpaid invoices. The role is responsible for the accurate, timely, and compliant production of client invoices, resolving client queries, credit control and cash collection. You will play a key role in maintaining strong billing controls, improving processes, and supporting the Groups growth strategy. You will operate in a fast-paced environment with multiple stakeholders. This is an exciting time to join the business, with ongoing development across a number of group companies.

About You

You will have experience working within a busy commercial finance or billing environment, ideally within professional services or regulated sectors. You are looking for the opportunity to develop your career within 3173, a high-growth provider of financial services to the pensions industry. You will have strong practical experience in end-to-end billing processes, including complex invoicing, recharges, time-based billing and contract-based fixed billing. You will be confident in ensuring billing accuracy, compliance with internal policies, and timely invoicing recognition, while delivering a high-quality service to both internal stakeholders and external clients. You will be a confident and credible communicator, comfortable working with senior leaders and operational teams, using your influencing skills to resolve billing queries and drive best outcomes for the business. You will be competent in Microsoft Excel and able to work effectively in a collaborative, fast-moving team environment, contributing to the ongoing development of the wider Finance function. You will be diligent, proactive, and detail-oriented, with the confidence to identify, challenge, and escalate billing risks, control issues, or process inefficiencies where appropriate. You will build effective working relationships at all levels across the organisation.

Responsibilities & Criteria

• Essential Requirements:

• Proven experience in a billing, invoicing, or similar finance operations role within a busy commercial environment
• Strong verbal communication skills and ability to influence
• Advanced user of Microsoft Excel and other MS Office applications
• Practical experience using finance or billing systems
• Sound understanding of billing processes, revenue concepts, and basic accounting principles
• High degree of accuracy, attention to detail, and strong numerical skills
• Strong customer service mindset with the ability to resolve queries professionally
• Proven ability to work effectively as part of a team
• Flexible approach, including willingness to work additional hours during peak billing periods
• Good academic record at GCSE level

• Qualified or part-qualified Accounting Technician
• Experience billing within professional services, pensions, or financial services
• Experience using Netsuite or similar finance/ERP systems
• Experience with complex or contract-based billing structures
• Experience using advanced Excel techniques such as macros or VBA

Circumstances

• Location: Belfast (Hybrid Model)
• Working hours: Monday to Friday, 37.5 hours per week, with additional hours as required
• All roles are subject to a six-month probationary period.
• The successful candidate will be required to complete an Access NI check, along with reference checking and security vetting as part of the pre-employment process.