Billing Administrator Job at Comex 2000 UK Ltd (Wednesbury)

Job Description

We're the team behind the UK's telecom networks - building, upgrading, and keeping the country connected. From fibre installs to 5G rollouts, we deliver at pace, with quality, and with pride. If you enjoy leading teams, solving problems and making things happen, Comex 2000 is where it happens. As our programmes continue to grow, we're looking for a highly analytical Billing Administrator to join our Finance team and play a critical role in ensuring accurate billing, revenue recognition, and cash flow across the business. This is more than a traditional administration role. We're looking for someone who is confident working with large volumes of data, enjoys investigating discrepancies, and can use advanced Excel skills to drive billing accuracy and support business performance. Excel will be a key tool in your day-to-day role. You'll be expected to work confidently with complex spreadsheets, analyse large datasets, reconcile information across multiple sources, identify billing exceptions, and produce accurate reporting. If you love working with data and spotting what others miss, this could be the perfect role for you.

Job Responsibility

Prepare, validate, and submit invoices accurately and on time through customer portals and billing platforms
Process billing information and reconcile customer data to ensure revenue is recognised correctly
Investigate and resolve billing discrepancies, exceptions, adjustments, DFEs, and payment issues
Analyse billing data to identify trends, anomalies, and opportunities for improvement
Manage billing records, documentation, and client account information with a high degree of accuracy
Support cash flow by working closely with Finance and operational teams to resolve outstanding billing issues
Respond to client billing queries professionally and efficiently
Produce reporting and insights that support informed decision-making
Support audit activities and ensure compliance with company and regulatory requirements
Drive process improvements and support the adoption of digital and AI-enabled solutions

Requirements

Previous experience in a billing, finance administration, revenue, accounts receivable, or similar role
Strong understanding of invoicing, billing cycles, reconciliations, and exception management
Exceptional attention to detail and the ability to manage multiple priorities
Strong numerical, analytical, and problem-solving skills
Excellent communication and stakeholder management skills
A proactive mindset with a focus on accuracy, efficiency, and continuous improvement
Advanced Microsoft Excel skills are essential for this role
You should be confident using: Pivot Tables and Pivot Charts
XLOOKUP, VLOOKUP, INDEX MATCH and other lookup functions
SUMIFS, COUNTIFS and logical formulas
Data validation and conditional formatting
Complex reconciliations across multiple datasets
Data cleansing and manipulation
Reporting and trend analysis
Large spreadsheets with high volumes of financial or operational data
GCSEs or equivalent, including Maths and English
Fluent English

Nice to have

Experience within telecoms, construction, utilities, or project-based environments
Experience managing DFEs, exceptions, and billing adjustments
Experience supporting internal and external audits
Experience using ERP, billing, or finance systems
Working knowledge of Power BI and reporting tools
Business Administration Level 4 qualification (or willingness to work towards)

What we offer

Be part of a business helping to build the UK's digital future
Play a key role in protecting revenue and supporting business performance
Work with large datasets and develop your analytical expertise
Join a collaborative team focused on continuous improvement
Gain exposure to major telecoms infrastructure programmes and projects

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Billing Administrator

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