Location: HMP Thameside, Thamesmead, London
Salary: From £30,000
Contract: Permanent
Hours: Full-time, Monday to Friday, 8:00 AM – 4:30 PM Join Serco and Play a Vital Role in a Secure and Fast-Paced Environment
Are you looking for a dynamic and rewarding role where no two days are the same? Do you thrive in an environment that requires precision, responsibility, and trust? If so, we want you to join our team at HMP Thameside, London’s only private prison, as an Admin Support Officer.
At HMP Thameside, we manage a Category B resettlement prison, providing secure and effective services for up to 1,232 male prisoners. As part of our finance and administration team, you will ensure that prisoners’ financial assets, valuables, and accounts are accurately managed, safely stored, and efficiently processed. What You’ll Be Doing
As an Admin Support Officer, you will be a key figure in the prison’s financial and administrative operations. Your responsibilities will include:
Handling and securing prisoners’ valuables, ensuring all items are properly documented and accounted for.
Managing prisoner accounts by processing cash, cheques, and secured payments.
Performing financial reconciliations, ensuring that all funds received and transferred are accurate.
Issuing funds to prisoners upon release or transfer, ensuring all records are up to date.
Processing wages for prisoners and resolving payment queries efficiently.
Managing incoming and outgoing mail, as well as handling small deliveries and packages.
Providing administrative support, including answering queries, handling paperwork, and offering a professional telephone service.
Ensuring the security of sensitive information, complying with all prison policies and procedures. What We’re Looking For
We’re looking for individuals who are highly organised, detail-oriented, and confident working in a fast-paced environment. If you have experience handling cash and managing financial transactions – perhaps from working in retail, banking, or administration – this role could be a great fit for you.
Experience handling cash transactions and reconciliations is essential.
A background in customer service, sales, or finance is highly desirable.
IT literacy is an advantage, but full training will be provided.
You must be trustworthy, reliable, and able to handle confidential information with professionalism.
Why Serco
A place you can make an impact – We look after around 5,000 prisoners in our prisons and been in the business for 25 years, employ 2,000 colleagues in our 6 custodial contracts so you can guarantee you’ll be delivering an essential service that touch people’s lives.
A place you can count on - Our diverse UK-wide operations offer unrivalled opportunities to learn and develop. You’ll be able to broaden your experience and apply your skills in new ways.
A place for you - We are a motivated team who will encourage you and help you to succeed. You’ll have the resources you need to do your job in a diverse and supportive environment.
About Serco
At Serco, not only is the nature of the work we do important, everyone has an important role to play, from caring for vulnerable people to managing complex public services. We are a team of 50,000 people responsible for delivering essential public services around the world in areas including defence, transport, justice, immigration, healthcare and citizen services. We are innovators, committed to redesigning and improving public services for the benefit of everyone.
By joining Serco you will have unlimited access to our Global Employee Networks – SercoInspire (Gender), SercoEmbrace (Multicultural), SercoUnlimited (Disability) and In@Serco (LGBT & Networks). Serco Employee Networks, led by colleagues who are passionate about diversity, inclusion and belonging.
Apply
Please click on the apply button to complete your application. Occasionally we receive a large volume of applications for our roles and when that happens we sometimes bring the closing date forward, so please apply promptly to avoid disappointment.
At Serco, we see people first and foremost for their performance and potential. We are committed to building a diverse and inclusive organisation that supports the needs of all. As such we will make reasonable adjustments at interview through to employment for our candidates and strongly encourage applications from a diverse candidate pool. We are open to discussions around flexibility and flexible working. We operate a hybrid work structure in many of our business areas. We are proudly Disability Confident Leader employers and holder of the Gold Inclusive Employer Standard. Disabled applicants who meet the minimum criteria for the job will be given the opportunity to demonstrate their abilities at an interview. For help with your application please contact 0345 010 4000.
At Serco we support fair access to employment for those with unspent criminal convictions through the ‘Ban the Box’ pledge (some may be exempt due to the nature of the role and the security clearance required). Please contact our recruitment team directly on 0345 010 4000 to discuss

Please refer the Job description for details