About this role
IT & Security Analyst
One Big Circle – Bristol
£28,000- £32,000 (Depending on experience)
Full-Time 37.5 hours over 5 Days
About One Big Circle
Be part of an award-winning workplace: The Sunday Times Best Medium-sized Technology Company 2025
Formed in 2017, One Big Circle is a fast-growing Bristol technology company that provides “Intelligent Video” solutions. We focus entirely on solving real-world industry problems by fusing new technology in the field of Video, IOT, Cloud and AI providing end to end solutions which allow our customers to dramatically improve their operational efficiency and safety. Our culture is one of high-quality technical delivery and we work at a speed that many industries are unaccustomed to; we have done this by building a team dynamic that challenges and empowers our people and creating an environment where everyone contributes and learns. We are growing, profitable and have ambitious plans to continue expansion in and beyond our existing markets.
We are looking for a proactive and motivated individual to join our team to support the business in further growing our flagship award-winning product: AIVR. AIVR (Automated Intelligent Video Review) is a state-of-the-art video technology system used by thousands of people in the rail industry. AIVR has won dozens of awards and is recognised as the market leading solution, but we are building many more opportunities both in existing and new markets which will further accelerate our growth.
We have built a culture where people feel supported, included, and empowered to do their best work.
Our team is growing, and we’d love for you to be part of the journey.
Role Summary
We are looking for an IT & Security Analyst to assist in maintaining our IT infrastructure and provide support managing security compliance.
The role is based in our Bristol office. Occasional travel may be required to our Derby office and Datacentre in South Wales.
Responsibilities
- Diagnose and resolve technical problems related to servers, workstations, laptops and network equipment.
- Assist in the installation, configuration, and updates of software applications and patches.
- Maintain and improve security monitoring, detection and response capability across tools, logs and alerts.
- Maintain accurate records and documentation of IT systems, procedures, and user requests.
- Enforce IT security policies and best practices, support audits, assessments and evidence gathering to demonstrate adherence to policies, controls and standards.
Personal Qualities and Technical Skills
- Knowledge of Windows and Linux operating systems.
- Understanding of Networking Fundamentals.
- Ability to work well in a team and collaborate with other staff and business units.
- Strong troubleshooting and problem-solving skills.
- Strong organisational and multitasking abilities.
- Strong technical writing / documentation skills.
Company Benefits Include
- Auto enrolment Pension Scheme
- 25 Days Holiday plus bank holidays
- Life Assurance
- Private Healthcare Cover
- Work related training courses as required
- Complimentary snacks and refreshments including fresh fruit
• Office-Centric role
- Access to Bike to Work Scheme
- Secure bike storage and shower facilities
- Social events
How to Apply
Join an award-winning team, named ‘The Sunday Times Best Medium-sized Technology Company 2025’. At One Big Circle, you’ll be part of a fast-growing team where your ideas and contributions are truly valued.
Please send your CV and covering letter to jobs@onebigcircle.co.uk.
By applying for this role, you understand that we will process your personal information in accordance with our privacy policy, accessible at https://onebigcircle.co.uk/privacy-policy/
Successful applicants will be required to pass a BPSS (Baseline Personnel Security Standard) check.
Find out more about us at www.onebigcircle.co.uk
About cyber security & digital forensics roles for ex-police
Cyber security, digital forensics and incident-response roles. DMIs, cybercrime investigators and digital forensics officers bring evidential discipline and investigative judgement that DFIR and security teams struggle to hire.
See all cyber security & digital forensics jobs in Bristol →Why this fits a police background
- Evidence & case files
- Working to legislation & regulation
What cyber security & digital forensics roles pay ex-police
Advertised UK ranges, editorial estimates reviewed July 2026
| Digital forensics analyst | £32,000–£45,000 |
| DFIR consultant | £45,000–£65,000 |
| Senior forensics / IR specialist | £60,000–£80,000 |
| Threat-intelligence specialist | £55,000–£80,000 |