Chorus helps SMBs and large organisations across Bristol and the UK strengthen and manage cyber security, covering everything from initial assessments through to 24/7 managed cyber security.
Cyber Security Bristol
Cyber security services in Bristol
Overview
Microsoft security experts
Whether you’re reviewing your current security setup, working towards Cyber Essentials certification, or looking for 24/7 managed security, Chorus supports organisations across the region at every stage. We specialise in Microsoft security technologies and work with SMBs, mid-market and enterprise-scale organisations across Bristol, the South West and the UK.
As a Microsoft Security Elite partner, members of the Microsoft Intelligent Security Association (MISA) and with our SOC services having Microsoft-verified MXDR solution status, we are one of the most accredited Microsoft Security partners in the world.
£195k
Average cost of a significant cyber attack on a UK business (KPMG, 2025)
25+
Years delivering cyber security and IT services to Bristol
<5min
Mean time to acknowledge threats in our CSOC
About us
25 years in the South West
We’re based in Portishead, just outside Bristol, and have worked with local businesses for over 25 years. We work with organisations already using Microsoft 365, typically ranging from SMBs through to larger organisations with up to 3,000 users. Our clients are based across Bristol, the South West and the UK, and include both commercial organisations and charities.
If your board is asking questions about security coverage and you’re looking to improve your security with Microsoft tooling, we’re likely a good fit.
What we offer
Our cyber security services
Our cyber security services span strategic guidance, assessment, hands-on technical implementation and 24/7 fully managed security. Whether you need a one-off project or ongoing managed SOC services, we have the Microsoft expertise and services to help keep you secure.
Benefits of our cyber security services
Assess your risk
A Threat Check or cyber security assessment gives you a prioritised view of your risk, without committing to an ongoing service.
Microsoft security expertise
We configure Entra ID, Defender XDR, Sentinel and more to best practice. Most organisations have M365 licences, but aren’t getting full value from them.
Build a Zero Trust security posture
We help organisations use their existing Microsoft 365 licences to implement a modern Zero Trust security posture, consolidating tools, reducing costs and getting more from what they already have.
24/7 SOC coverage
Our SOC monitors your environment around the clock, 365 days a year, with a mean time to acknowledge of three minutes and mean time to close of 17 minutes.
Independently verified credentials
MISA membership, Verified MXDR Solution status, advanced specialisations in Cloud Security and Threat Protection, ISO 27001 and Cyber Essentials Plus.
Bristol-based expertise
We’re based in Portishead, just outside Bristol. Our services are delivered remotely, but being local means face-to-face meetings, on-site visits and in-person service reviews are easy to arrange.
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Assess your risk
A Threat Check or cyber security assessment gives you a prioritised view of your risk, without committing to an ongoing service.
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Microsoft security expertise
We configure Entra ID, Defender XDR, Sentinel and more to best practice. Most organisations have M365 licences, but aren’t getting full value from them.
-
Build a Zero Trust security posture
We help organisations use their existing Microsoft 365 licences to implement a modern Zero Trust security posture, consolidating tools, reducing costs and getting more from what they already have.
-
24/7 SOC coverage
Our SOC monitors your environment around the clock, 365 days a year, with a mean time to acknowledge of three minutes and mean time to close of 17 minutes.
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Independently verified credentials
MISA membership, Verified MXDR Solution status, advanced specialisations in Cloud Security and Threat Protection, ISO 27001 and Cyber Essentials Plus.
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Bristol-based expertise
We’re based in Portishead, just outside Bristol. Our services are delivered remotely, but being local means face-to-face meetings, on-site visits and in-person service reviews are easy to arrange.
Cyber security consultancy in Bristol
Strengthen your security
Our cyber security consulting covers strategic guidance, security roadmapping, cyber security assessments and hands-on technical implementation of Microsoft security technologies. Assessments review your posture across six areas: Identity, Devices, Applications, Infrastructure, Networks and Data. For organisations working towards certification, we support Cyber Essentials and Cyber Essentials Plus.
- Cyber security assessments
- Identity and access management
- Cyber Essentials and CE+ support
- Security hardening and remediation
- Threat protection and phishing simulation
- Virtual CISO and security roadmapping
Microsoft security expertise
Get more from Microsoft 365
Most organisations with Microsoft 365 Business Premium, E3, E5 or E7 have powerful security and compliance tools available, but haven’t configured them properly. Chorus implements and configures the Microsoft security stack to best practice, covering covering Identity, Devices, Applications, Infrastructure, Networks and Data. We also work with Microsoft Purview for data protection and governance.
- Entra ID and Conditional Access
- Microsoft Defender XDR
- Microsoft Sentinel (SIEM)
- Microsoft security hardening
- Data protection and information governance
Managed security services
Managed SOC services
Our Security Operations Centre (SOC) delivers true 24/7/365 services with a team of security analysts and experts available at any time of day- monitoring, detecting, investigating and responding to threats. We focus on real response with threat containment to stop attacks and remove the threats – not just alerting. We offer two simple services depending on coverage: Managed Detection & Response (MDR) and Managed Extended Detection & Response (MXDR).
- 24/7/365 CSOC monitoring and response
- Team of experts available 24/7
- Built on Microsoft Security to use what you already have
- Mean Time to Acknowledge under 5 minutes
- Mean Time to Close under 20 minutes
- Incident response
- Security reporting and service delivery management
Data protection and governance
Protect your data across Microsoft 365
Microsoft Purview gives organisations the tools to classify, protect and govern their data across Microsoft 365. Chorus helps you implement Purview to address data loss prevention, information protection, insider risk, and data lifecycle management. For a full overview of what’s covered, discover our data protection and governance services.
Related services
Why Chorus?
A Microsoft-focused cyber security partner
Chorus is a Bristol-based MSP and MSSP with over 25 years of presence in the South West, delivering managed IT, cyber security and Microsoft IT consultancy for organisations locally and across the UK. As a Microsoft Security Elite partner, members of the Microsoft Intelligent Security Association (MISA) and with our SOC services having Microsoft-verified MXDR solution status, we are one of the most accredited Microsoft Security partners in the world. We hold ISO 27001, ISO 9001 and Cyber Essentials Plus, and our CSOC and UK-based service desk are available 24/7.
52% of ransomware attacks hit organisations on a weekend or holiday, when staffing is thinner and response times slower.
(Semperis, 2025)Frequently asked questions (FAQs)
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What cyber security services does Chorus offer in Bristol?
Chorus offers a full range of cyber security consultancy and managed security services for Bristol businesses, including cyber security assessments, Microsoft 365 security implementation, Cyber Essentials and Cyber Essentials Plus support, and 24/7 managed detection and response (MDR and MXDR). Services can be engaged individually as standalone projects or as part of an ongoing managed arrangement.
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Where do I start if I'm not sure what cyber security I need?
A cyber security assessment is a good starting point. It gives you a prioritised view of your risk without committing to an ongoing contract. From there, you can address the highest-priority issues with your own team, bring in Chorus for specific remediation work, or move to a managed service if ongoing coverage makes sense.
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What is Microsoft security implementation?
Microsoft 365 Business Premium, E3, E5 and E7 all include powerful security tools that many organisations haven’t fully configured. Getting these set up correctly can close significant security gaps without having to buy additional software.
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What is Cyber Essentials and can Chorus help businesses approach it?
Cyber Essentials is a UK government and NCSC-backed certification scheme covering key security controls. Cyber Essentials Plus requires an independent technical audit on top. We help organisations strengthen their cyber security posture and prepare for Cyber Essentials certification. Our role is to guide you through the requirements, identify gaps, and support you in implementing practical security controls. For more detail, review our Cyber Essentials services.
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How does Chorus deliver managed cyber security?
Our managed security services are delivered through our own Cyber Security Operations Centre (CSOC), which operates 24/7/365. The CSOC uses Microsoft Defender XDR and Microsoft Sentinel to deliver Managed Detection and Response (MDR) and Managed Extended Detection and Response (MXDR) services. Chorus holds Microsoft Verified MXDR Solution status, awarded following Microsoft’s review of our service delivery against their best practice standards.
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How does Chorus improve security for businesses using Microsoft 365?
As a leading Microsoft partner with deep expertise across Microsoft 365, Chorus helps organisations modernise their security using the powerful security features already included in their licences. For organisations requiring more advanced capabilities, we also implement and manage technologies such as Microsoft Sentinel, giving you enterprise-grade threat detection and response alongside your existing Microsoft 365 investment.
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Why choose Chorus as your Bristol-based cyber security partner?
Chorus has been working with Bristol and South West businesses for over 25 years. MISA membership is by invitation only and held by a small number of Microsoft partners globally, and Chorus is one of them. We also hold Microsoft Verified MXDR Solution status, are Cyber Essentials Plus certified, and hold ISO 27001 and ISO 9001 accreditations. Our CSOC operates 24/7/365 with a mean time to acknowledge of three minutes and mean time to close of 17 minutes. While our services are delivered remotely, being based near Bristol means face-to-face account management and service reviews are easy to arrange.
