Clear Responsibilities from Day One
Everything documented, so nothing gets missed.
Co-Managed IT · London
Co-Managed IT Support Services for Your In-House IT Team
Overstretched IT team? We're the backup you can rely on. If your in-house team needs extra hands, specialist expertise, or dependable UK-based coverage, Sereno works alongside them, reducing pressure and filling skill gaps, without adding to your payroll.
Discover reliable IT support for London businesses backed by local knowledge and on-site support when you need it.
Who does what
In sync
- IT strategy & roadmap You
- Day-to-day support Sereno
- New starters & leavers Sereno
- Security monitoring Together
- Projects & rollouts Sereno
- Admin access & control You
Agreed clearly from day one, you stay in control.
Is it right for you?
When do co-managed IT support services make sense?
Sereno's structured, flexible co-managed IT services strengthen internal teams and remove the blockers that slow you down. You'll benefit from our co-managed service if you:
Small IT team
Have a small IT team that's overstretched and needs reliable, ongoing support to keep pace with demand.
UK working hours
Rely on global or offshore IT support but struggle with slow response times during UK working hours.
Hands-on support
Manage a UK office or branch and need a local co-managed IT service provider for hands-on support.
Strategic projects
Want your internal IT team focused on strategic projects, not tied up with repetitive support and admin tasks.
IT capacity and capability
Need to increase IT capacity and capability without the time, cost, or complexity of hiring more full-time staff.
Retain control
Want to retain control of your IT operation, including how services are managed.
Sound familiar?
Common co-managed IT support scenarios we help with
Many growing businesses reach a point where internal IT teams need extra support. Here's where Sereno's co-managed IT service steps in:
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You have 1–3 IT staff managing daily operations, but struggle with capacity during holidays, sick leave or busy periods.
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Your skilled IT staff are bogged down with first-line support, device builds, user setup, licences, leaving little time for strategic initiatives.
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Your business has outgrown a solo IT manager, but you're not ready to build a full IT department.
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Your core IT is managed from a global HQ or offshore team, but your UK office needs responsive, on-the-ground support.
What we cover
What do our co-managed IT support services include?
Sereno's co-managed IT services provide the expertise and resources your existing team may need to handle growing workloads and complex projects, part of our broader managed IT services.
How it helps
Extra capacity, exactly when it's needed most
Internal IT staff often manage a wide range of responsibilities, from first-line support to cloud management and IT strategy. For organisations with limited internal IT resources, keeping systems secure, reliable and up to date can become increasingly challenging.
Sereno delivers comprehensive co-managed IT services, providing additional expertise, specialist tools and extra capacity when it's needed most, backed by recognised industry credentials.
Backed by recognised credentials
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Microsoft Gold Partner
Certified Microsoft expertise
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SME Awards Finalist
Recognised for service quality
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Cyber Essentials Plus
Independently assessed security
Free up your team’s time
We can take on routine support tickets, IT infrastructure support and other time-consuming tasks, allowing your internal IT team to focus on higher-value work.
Reliable helpdesk backup
When your internal team is busy or stretched, Sereno can step in to handle user issues and keep support requests moving.
Expert IT project support
Sereno supports planned projects, helping your internal team manage more complex work without taking attention away from their existing responsibilities.
Specialist technical troubleshooting
More complex issues can be escalated to experienced specialists with access to the tools and technical resources needed to investigate and resolve them.
Cover for holidays and absence
One of the immediate business benefits of co-managed support is dependable cover when your internal IT staff are unavailable. You maintain business continuity without moving to a fully outsourced service model.
Give your team the backup it deserves. Talk to us today.
Why Sereno
Why choose Sereno as your co-managed IT provider?
Your internal IT department deserves a support partner they can count on. At Sereno, we provide UK-based co-managed support that builds trust, strengthens your IT function, and helps your team perform at its best.
We understand your internal team knows your systems and your people better than anyone. As a co-managed service provider, our role is to work alongside them, filling skill gaps, reducing the pressure, and offering additional support exactly where it's needed. Hover a card to see what's included.
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Trusted UK-Based Coverage with Global Awareness
Reliable local support that fits your structure.
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Help with Day-to-Day IT Tasks
We take the routine work off your team’s plate.
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Fast, Dependable Support
Extra support for your internal IT capability, without disruption or delays.
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Expert Support for Projects, Large and Small
Extra hands when your team needs them most.
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A Partnership You Can Count On
Built around collaboration and long-term relationships.
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Access to Tools You Can't Get Directly
As a channel-only partner, we unlock more for your team.
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Proven Service Performance
Clear response times and dependable service levels.
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Security You Can Trust
Strong security standards, certifications and processes.
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Flexible Support That Scales With You
Scalable support that adapts as your workload and needs change.
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Recognised IT Support Provider
Independent recognition from Cloudtango and the industry.
Case studies
Client Success Stories
How we've strengthened teams and IT operations for businesses like yours.
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Case study · Hutton Consulting
The IT Relationship Hutton Consulting Was Looking For
Modernised cloud and identity setup to support hybrid working, with security and strategy from a partner they could finally trust.
Read the case study -
Case study · Statons Estate Agents
How Statons Transformed Operations with Microsoft 365
Took ownership of devices, onboarding and security so the operations team could focus on customers, not IT.
Read the case study -
Case study · Urban Logistics REIT
Reliable IT Support for a Listed Property Investment Company
Built an IT roadmap aligned to growth, with predictable monthly investment, dependable support and clearer reporting.
Read the case study
How it works
How co-managed support works
Designed to support your internal staff without disrupting existing processes. Hover a step to see what's involved.
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Review
Understanding your IT environment
We begin by reviewing your current infrastructure and processes.
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Align
Defining roles & responsibilities
Together with your team, we define which areas Sereno will support and which remain the responsibility of your internal IT department.
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Integrate
Integrating tools & systems
Our monitoring and support tools are integrated with your existing systems.
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Support
Supporting daily IT operations
Sereno works alongside your internal team to help manage workloads, resolve technical issues, and assist with infrastructure and projects.
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Optimise
Continuous monitoring & improvement
Ongoing monitoring, reporting and recommendations keep your IT secure and efficient, and support flexes as your business grows.
Partnered with the best · Certified by Microsoft, Google & Cyber Essentials
Our Happy Clients
Google Reviews
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Dominik
a year ago
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Jo Joynes
a year ago
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AJ Shazad
a year ago
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Tim Field
a year ago
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Scott Simmons
a year ago
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Adam Wright
a year ago
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MB
a year ago
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Daljit Sumal
a year ago
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Kevin Williams
a year ago
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Richard Martin
a year ago
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Annabelle Pugh
2 years ago
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Dana Ozola
2 years ago
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John Holmes
2 years ago
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Alexander Moss
2 years ago
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James Goodwin
2 years ago
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Madeleine Barley
2 years ago
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Chris Needham
3 years ago
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shima
9 months ago
CloudTango Reviews
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“Sereno have been a reliable and valued partner, with a fantastic team of highly responsive and capable technicians, backed by proactive and forward-thinking leadership.”
John Holmes
IT Manager, Oikos Storage Ltd
CloudTango Review
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“After a couple of challenging years with our previous IT support company, moving to Sereno IT in 2024 has been one of the best business decisions we've made.”
Joanna Socko
Franklyn James
CloudTango Review
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“IT is no longer a burden or even a part of my work week. I know the team are looked after quickly if they have an issue, and I get all the advice and guidance…”
Jamie Waldegrave
COO/CFO, Urban Logistics
CloudTango Review
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“The advice we've had from Sereno means we can make informed decisions about what our company actually needs and we know we can implement changes easily.”
Alice Lees
Hutton Consulting
CloudTango Review
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“Sereno IT provided a solution that perfectly aligned with our needs. Not only did they help us save on costs, but they also ensured our systems are secure and…”
Nigel Shearsby
Statons Estate Agents
CloudTango Review
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“We've been working with Sereno IT for a year now and continue to be impressed by their forward-thinking approach.”
Katie Sexton
Archio Ltd
CloudTango Review
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“Sereno are an innovative IT company who make solving your IT issues quick and simple with their vast knowledge.”
Jo Nauman
AKT Productions Limited
CloudTango Review
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“We have been working with Sereno for around a year and half now, and the support they've provided has been truly invaluable to our business.”
Fay Allen
Greencore Homes Ltd
CloudTango Review
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“We've been working with SERENO IT and are very happy with their service. Communication is always smooth and efficient, and their team is extremely helpful and…”
Aziz Selcuk Tuncer
Ant Yapi UK Ltd
CloudTango Review
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“Reliable, Responsive, and Proactive — A True IT Partner. We switched to Sereno after experiencing repeated delays and poor communication from our previous IT…”
Nisha Patel
Strata Property Group Ltd
CloudTango Review
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“We have worked with Sereno for a couple of years and have been really pleased with them, they are much better than our previous IT support.”
Justin Elvey
Director, Big Potato Limited
CloudTango Review
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5-star rated on Google and CloudTango
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75+
Companies and 2,300+ people supported
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98%
Client retention since inception, with zero quality-related churn
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100%
Staff retention last year, so you work with the same accountable team
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Growing
We helped our clients grow 14% on average last year
Frequently asked questions
Common queries on the co-managed model, whether it's right for you, and what to expect when partnering with Sereno.
Co-managed support refers to partnering with an external provider that works as an extension of your team without adding to your payroll. The key difference is that co-managed IT is about collaboration, while fully managed IT support is about replacement.
Unlike partnering with a fully managed service provider (MSP), where everything is outsourced, our co-managed approach keeps you in control while we provide external expertise to handle the areas you need help with. Whether it's day-to-day support, escalations or project delivery, we integrate seamlessly with your existing IT setup to strengthen your core operations. This gives your team the confidence to take holidays, manage unexpected absences, and maintain service levels without disruption.
You may need co-managed support if your internal staff is under pressure or struggling to keep up. Common signs include overstretched internal resources, an IT manager tied up with daily support tasks, or skill gaps that limit your ability to manage projects and IT systems effectively. You might be facing frequent delays in IT initiatives, rising cyber security risks, or downtime that's starting to impact productivity.
Not sure where to start? Let's talk. Book a quick IT consultation and find out if co-managed support is the right fit to strengthen your in-house expertise. No sales pitch, just clear, honest advice.
Yes, Sereno's co-managed IT support is specifically designed to reduce the workload on your in-house IT. Our team works alongside your in-house specialists to handle routine tasks such as user support, device setup, regular reviews, system monitoring and maintenance. This allows your IT staff to focus on strategic projects, planning and, ultimately, achieving your business goals. If your existing IT team is stretched thin or spending too much time on support, co-managed support can provide the extra capacity you need without increasing headcount.
In a co-managed IT setup, you can outsource a wide range of tasks to complement your existing resources. Common areas include user support, device builds and configuration, onboarding and offboarding, patch management, remote monitoring, licence and permissions management, cloud platform support, and daily troubleshooting. At Sereno, we also assist with project delivery, procurement and cyber security tasks. You choose which responsibilities to keep in-house and which to delegate, giving you full flexibility and control.
If you're unsure where to start, feel free to request an audit from us. We'll help you evaluate where your internal specialists are spending the most time and work with you to define clear responsibilities that make the best use of your resources.
Yes. With co-managed support, you gain access to specialist technical expertise without the cost of adding more full-time staff. It can be a cost-effective way to increase capacity while keeping support aligned with your business objectives.
Most co-managed setups can be completed within a few weeks, depending on the size and complexity of your IT environment and cloud infrastructure. We use a structured onboarding process to agree responsibilities, document your existing IT systems and put the required tools and processes in place before support goes live.
Yes. Sereno follows established data security and data protection processes to help protect sensitive data. Moreover, support can include proactive monitoring, threat detection and security awareness training where required.
Responsibilities are agreed and documented from the outset, so teams know who owns each task. Clear agreed processes help avoid gaps, duplication and confusion between your internal staff and our team.
Look for a provider with proven experience in relevant areas, clear communication and a flexible approach to working alongside your team. A reliable co-managed partner should respond quickly when extra support is needed and bring in specialist expertise for more complex issues or projects.
Yes. Sereno can provide emergency IT support for business-critical issues, with support available from 7am to 7pm on weekdays. Issues are prioritised by business impact, with the right engineer involved as quickly as possible. The exact level of emergency support will depend on your agreed support package and service requirements.
Keep reading
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Strengthen your in-house IT team with a partner you can count on.
Let's talk
Ready to back up your IT team?
Tell us where your team is stretched and we'll show you exactly how co-managed IT support could help, with no sales pitch, just clear, honest advice. Drop us a line or book a 1-1 call.
What we'll cover on the call
- Where your in-house team is stretched or has skill gaps
- Which tasks to keep in-house vs. hand to Sereno
- UK-hours coverage, escalation and admin-access boundaries
- How we'd integrate with your existing tools and processes
- A clear split of responsibilities from day one
We'll get back to you within 60 minutes during business hours.
You’re all set!
The next step is to choose a time that works for you. Once booked, our team will be ready to discuss your enquiry.
Book a time
If you do not book, we’ll contact you within 60 minutes during business hours.
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