Mobile Billing Specialist

Birmingham (2 days per week in office with flexibility)
Full-time | Permanent

(Internal Job Level Reference : Senior Associate)

About the Role

We’re looking for a highly organised and detail-driven Mobile Billing Specialist to join our growing team. This role sits at the heart of the mobile operation, co-managing day-to-day billing activities across internal and external systems.

Working in a fast-paced environment, you’ll collaborate closely with account managers, provisioning teams, suppliers, and wider billing teams to ensure billing accuracy, efficiency, and continuous improvement. This is a fantastic opportunity to build deep expertise across billing systems, supplier management, and cross-functional operations.

Key Responsibilities

• Manage and respond to queries within the billing mailbox, ensuring timely and professional communication
• Perform weekly bill run checks, identifying and resolving issues such as unallocated usage, missing services, and incorrect data
• Review Profit & Loss accounts to identify billing anomalies, rating errors, and revenue opportunities
• Support the monthly billing cycle, ensuring all supplier files are processed, services allocated, and products correctly mapped
• Manage tariffs and bolt-ons, including creating new tariff sets and retiring legacy ones
• Work closely with internal stakeholders and external suppliers to resolve billing queries and discrepancies
• Support billing migrations linked to mergers and acquisitions activity
• Verify supplier billing accuracy and raise/chase credits where needed
• Ensure adherence to regulatory and compliance requirements
• Suggest and implement process improvements to enhance efficiency and accuracy
• Assist with ad-hoc billing projects as required

Requirements

• Strong ability to prioritise and manage a busy workload with competing deadlines
• Excellent organisation and time management skills
• Confident communicator, both written and verbal
• Highly analytical with exceptional attention to detail
• Ability to work independently and make sound decisions
• Strong Excel skills, including VLOOKUPs and Pivot Tables
• Reliable, punctual, and proactive approach

Desirable Skills

• Previous experience in a billing role
• Experience within the mobile or telecoms industry
• Familiarity with billing platforms or CRM/database systems
• Experience working with internal and external billing systems

Benefits

• Clear progression pathways with opportunities to advance within a growing organisation.