As one of the UK’s leading law firms, we’re here for the people and businesses who rely on us at life’s important moments - made possible by our colleagues who bring the expertise, judgement and care that makes the difference.
Our colleagues bring Irwin Mitchell to life every day, so it matters that you feel valued from the very first day and aretrusted with the responsibility, in the right culture, to do the best work of your careers. Everyone’s path here is different, but we share a desire to help our business make a real impact.
Where possible we will support our colleagues to work in a way that works for them, for us and most importantly our clients. Please speak to a member of our Recruitment and Onboarding team for more information.
Your Role and What You'll Be Doing
6 Month Fixed Term Contract
As a System Billing Assistant, you’ll be working in the central support Billing Team. You’ll review system invoices for the Group and its subsidiaries, ensuring that all system generated invoices for the Group are processed in line with documented procedures and to agreed SLA’s.
- Reviewing bill requests for accuracy & liaising with file handlers with queries/concerns
- Reviewing & processing weekly & monthly billing reports along with any other ad hoc invoices
- Assisting with all other areas of billing where necessary
- Dealing with credit notes & any queries regarding these within service level agreement
- Providing help & advice on billing procedures in a timely manner
- Understanding the roles of colleagues in all areas of Financial Operations, recognising the end to end processing of transactions.
- Dealing with, or referring queries in a timely manner
- Ensuring that transactions are compliant with SRA Accounts Rules, VAT regulation, financial controls and firms policy.
About You
- An understanding of billing / invoicing processes
- Being able to work as part of a team, as well as working independently
- Experience of working in an externally regulated environment
- Being customer focused with excellent communication skills
- Accuracy and attention to detail in your work
Our Approach to Reward and Wellbeing
- 25 days' holiday as standard, rising to 28 days depending on role level, plus bank holidays and the option to purchase additional leave.
- Opportunities to share in our success through annual pay and bonus review processes for eligible colleagues.
- Health and wellbeing support, including Westfield Health and Digital GP access.
- Competitive pension arrangements to help you plan for the future.
- Two paid volunteering days every year to support causes that matter to you.
- Access to a range of colleague discounts and lifestyle benefits to support you both inside and outside of work.
We also offer a wide range of well-being initiatives to encourage positive mental health both in and out of the workplace and to make sure you’re fully supported.
In 2026, Irwin Mitchell was recognised in the Sunday Times Best Places to Work guide and was the only law firm included in the 'Very Big' organisation category
Our responsible business programmes are fundamental to who we are and our purpose. We’re committed to being a diverse and inclusive workplace where our colleagues can flourish, and we have established a number of inclusion network groups across our business to support this aim.
Our commitment to Social Responsibility, community investment activity and tackling climate change is a fundamental part of who we are. It’s made up of four strands: Our People, Our Community, Our Environment and Our Pro Bono.
Applying to Irwin Mitchell
We want every candidate to have a positive, fair and transparent recruitment experience. If you require any support or reasonable adjustments throughout the recruitment process, please speak to a member of our Recruitment & Onboarding team or contact Recruitment@IrwinMitchell.com
Artificial Intelligence (AI) is becoming an increasingly common part of modern working life. If you choose to use AI tools as part of your application or interview preparation, please review our AI in Recruitment Candidate Guidance AI Candidate Guidance
As part of joining the Irwin Mitchell Group, all successful applicants are required to complete our employment screening process. We carry out pre employment screening to establish your eligibility to work in the UK, and understand any criminal records or adverse financial history.
Our onboarding processes are designed to help us maintain the high standards of trust, integrity and professionalism expected by our colleagues, to protect the interests of the Group, clients, partners and other stakeholders.
Checks are conducted by trusted 3rd parties and the employment screening process will fully comply with Data Protection and other applicable laws.
Irwin Mitchell LLP is an equal opportunity employer.
Billing Assistant in Sheffield employer: Irwin Mitchell LLP
At Irwin Mitchell, we pride ourselves on being more than just a law firm; we are a supportive and inclusive team dedicated to making a meaningful impact in the lives of our clients. Based in Sheffield, our work culture fosters collaboration and personal growth, offering generous benefits such as flexible working options, extensive holiday allowances, and well-being initiatives that prioritise mental health. Join us to be part of a leading medical negligence team where your contributions will help shape landmark cases and deliver justice for those in need.
