Sales Invoicing Administrator

Sales Invoicing Administrator at NSS Group

Location:

Altrincham

Salary: £26,436.80 per annum

Department:
Finance

Looking for your next step in finance? If you’re organised, detail-focused, and enjoy problem-solving, this could be the perfect opportunity for you. NSS Group is a growing national business, and we’re looking for a Sales Invoicing Administrator to join our Finance team in Leeds. You’ll play a vital role in ensuring our customers are billed accurately and on time, helping to keep cashflow strong and our business moving forward.

In return, you’ll get the chance to work in a supportive team, benefit from hybrid working, and enjoy genuine opportunities to develop your career.

NSS is proud to hold Platinum accreditation from Investors in People. We are a specialist property services provider, delivering everything from building maintenance and window cleaning to platform hire and equipment testing. With our dependable, in‑house team, we work 24/7 across the UK, setting new standards for safety, speed, and reliability.

• Previous invoicing experience (property or facilities management sector experience preferred).
• Strong organisational skills and the ability to manage your own workload effectively.
• A methodical, problem‑solving approach and resilience under pressure.
• Excellent communication skills—confident liaising with both customers and colleagues.
• Proficiency in Excel and other business software, with strong data analysis skills.
• A collaborative attitude and enthusiasm for working within a growing team.

• Deliver customer invoices accurately and on time, with correct supporting documentation, for both key and non‑key accounts.
• Upload invoices to customer portals in line with client requirements.
• Monitor and enforce customer PO compliance across the business, escalating where required.
• Resolve invoicing issues by liaising with other departments to ensure smooth resolution.
• Maintain accurate records of invoiced and un‑invoiced work, ensuring alignment with financial records.
• Regularly update the Cleaning Division’s operations team on the status of un‑invoiced work.
• Ensure invoicing backlogs are minimised to optimise business cashflow.
• Meet all agreed deadlines set by your Line Manager.

• Free onsite parking
• Free refreshments with a friendly and sociable office environment
• An opportunity to progress and develop within the company
• 25 days annual holiday + bank holidays
• Monthly Reward and Recognition Scheme where our top performers are rewarded with vouchers for many retailers
• Trade Point Card which will enable you to get 10% off at any B&Q
• Day off for your birthday after length of service
• Eye care vouchers
• Referral bonus scheme
• Medicash health cash plan with discount on dental, health screening, gym discount, store discounts, specialist consultations and much more
• Hybrid working arrangement (3 days office based, 2 days working from home) available upon successful completion of probation period.

PTSG Group is a leading provider of specialist services across the UK and Europe. Through the acquisition of high‑quality specialist businesses, PTSG has built a group of industry‑leading companies delivering services across Access & Safety, Electrical Services, Building Access, Fire Solutions, and Water Treatment. With over 3,300 specialists supporting 90,000+ customers across 200,000 buildings, delivering over 170 different services, we are committed to delivering safe, compliant, and high‑quality services nationwide.

PTSG Group is proud to support the Armed Forces community and has formally signed the UK Armed Forces Covenant. We recognise the valuable skills and experience that service leavers, veterans, reservists, and military families bring to the workplace, including leadership, teamwork, resilience, and technical expertise. As part of our commitment, we guarantee an interview to ex‑Forces applicants who meet the minimum criteria for the role and are committed to supporting Armed Forces personnel in building long‑term civilian careers across our business.

PTSG Group is an equal opportunities employer. We are committed to creating an inclusive and supportive workplace where everyone is treated fairly and with respect. We welcome applications from all backgrounds and are dedicated to promoting diversity, equality, and inclusion throughout our recruitment process and across the wider business.

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