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Our difference

We are on a mission to deliver innovative business transforming technology solutions that exceed our customers’ expectations.

Our culture

Our values guide us in everything we do and help shape our culture and customer approach. Find out more about our values and meet some of our team.

Our Microsoft Partnership

As a Microsoft Solutions Partner, we’ve been at the centre of the revolutionary changes that technology has brought to every aspect of life and we continue to stand by their side at the centre of tomorrow’s digital transformations.

Microsoft Solutions Partner

Our partners

We have successfully built relationships with multiple partners that prepare businesses for the future.

Carbon management

We understand our environmental responsibilities as a UK business and IT Managed Service Provider, and we understand how important it is for our customers to partner with responsible providers.


Our team is made up of a diverse group of people from all around the world, and we all have one thing in common: we’re passionate about providing our customers with outstanding solutions.

Thinking of selling your IT business?

Core is a well funded Microsoft Solutions Partner with a 30 year history of being at the heart of control in IT.

We are supported by our bankers and have funds available for strategic business acquisitions. Together with our successful acquisition track record and a commitment to making deals happen, now is the perfect time to talk to us if you are considering selling your IT business.

If you are interested in discussing a potential exit of your IT business, please complete the form on the right. All correspondence will be treated in the strictest of confidence and a mutual non-disclosure agreement will be exchanged prior to any discussions taking place.

Interactive Microsoft workshops

Our workshops are designed to help you realise the value of Microsoft technologies in your business, gain real value from your investment and transform the way you work.

The workshops are a collaborative and immersive experience; our experts will work with you to identify your business objectives and establish the Microsoft technologies to help you achieve them.

Request a workshop

Our range of workshops covers every aspect of the modern workplace including productivity, collaboration, identity, security and compliance and communication, with interactive and engaging sessions that bring the art of the possible to life.

Download our workshop guide

Read more about the interactive workshops we offer, and how they can benefit your business by downloading our guide.

MCI Workshop Introduction

Managed Services

Discover why Core is the first choice for many organisations looking to add flexibility, efficiency, and expertise to their teams.

Cloud Technology

From Microsoft’s leading platforms to bespoke cloud solutions, Core’s range of cloud technology solutions covers everything the modern workplace needs.

Professional Services

Whichever challenges you face on your digital journey, Core's professional services team has a solution to help, from Automation & AI to our innovative Smart Services.

Public Sector

Certified secure solution for the public sector, providing a reliable, flexible, secure and affordable IT solution.

Commercial Sector

Certified commercial sector solutions, covering all your commercial needs from financial and legal services, through to manufacturing.

Download our Frontline Workers white paper

Learn how technology can help to balance productivity with wellbeing for Frontline Workers.

White paper: How technology is revolutionising the health and productivity of frontline workers

Why our customers choose us

Since we were founded in 1990 and started our Microsoft journey, we have supported over 10,000 customers on their communications and collaboration projects, and with the introduction of Microsoft's cloud technology, have grown our capabilities significantly across Microsoft 365 and Azure.

What sets us apart is a talented and passionate team who truly love what they do, demonstrating boundless enthusiasm and dedication in every single project.


"It was apparent from day one that Core had a depth of knowledge in Microsoft 365, which we simply hadn’t found anywhere else."

Greater London Authority

"Core has a lot of experience working with the public sector, which was definitely a benefit."

Angel Trains

"There’s such a good working relationship with Core, it’s like having another permanent person in our organisation."


"We had a really good, down to earth relationship with a few of the guys, and they know what they are doing."

Read our latest blog articles

Harnessing Evergreen IT Services for Strategic Advantage

Maximising Savings on Azure with Core’s Gain-Share Offer
Future-Proofing Your Business: The Perils of Rushing into Copilot for Microsoft 365

AI for All: How Microsoft's Latest Update on Copilot Opens Doors for all Businesses
The Core knowledge hub

Stay up-to-date with the latest insights, trends, and discussions from Core's team of subject matter experts through our blog topics and news articles.


Success Stories


The story

Successfully moving fifteen years of legacy data to the Cloud.


"Core were very professional & very available. A lot of this stuff was done at evenings and weekends, and I can remember many phone and Lync conversations late at night."

Alan DillawayHead of IT Technical Services & Facilities


  • European operation of the Riverstone Group
  • Manage over $2.6billion in gross liabilities through offices in Brighton & London
  • Migrated 100 users from on-premise Lotus Notes to Microsoft Office 365

The Requirement

In 2012, Riverstone International decided to move from an existing, on-premise Lotus Notes solution to Microsoft Office 365, in order to both work with more flexible, industry standard technology and align with the US parent company. Riverstone International wanted a more modern, streamlined environment that integrated fully with existing Office tools, and one that would reduce its reliance on its four internal servers and network infrastructure.

“We had to make the decision to move to the cloud or stay on-premise, and then try and find a partner to help us do that” says Head of IT Technical Services and Facilities Alan Dillaway. However, the company wasn’t just looking for a partner who could help set up the Office 365 tenancy, but one that could help them convert their legacy data. “We had fifteen years of historical data that backs up our business” explains Dillaway, “and it’s absolutely essential because we use it day in, day out. It bolsters our ability to work in business, and we need to be able to back up what we’re doing – often by discovery and disclosure through email.”

Perfect partner

After research, Dillaway & his team shortlisted three Microsoft Gold Partner companies, & following negotiations went for Core. As well as a convenient London base & a flexible attitude – the initial meeting was organised at fifteen minute’s notice – Core brought other benefits to the table. “They had their Gold Partner status; they were very knowledgeable; they had already done some Lotus Notes migration work, so they ticked all the boxes from our terms of reference” says Dillaway.

Together with Core, Riverstone International planned an ambitious migration & data conversion plan, along with user-acceptance & testing. Following initial discussions in May & June, the new solution had to be in place by mid- August. “We had to get onto the cloud to facilitate some corporate acquisition work” explains Alan Dillaway.

“We were taking on some new business and we didn’t want to take it into Lotus Notes. We had to get our infrastructure up & running & prepared to receive new data.”

Despite the technical challenges inherent to coming from a Lotus Notes environment to Office 365, the process ran very smoothly. Riverstone was looking to gain knowledge from working closely with Core in the Microsoft environment, but was also able to share knowledge back, as both internal & external teams found issues & ways to overcome them.

“Core had their Gold Partner status; they were very knowledgeable; they had already done some Lotus Notes migration work, so they ticked all the boxes from our terms of reference.”

Alan DillawayHead of IT Technical Services & Facilities

Smooth transition

Throughout the process, Core bent over backwards to make the transition as smooth as possible. “They needed to be flexible, they needed to be adaptable, they needed to work within our changing requirements” says Dillaway. “Milestones changed, placeholders changed & we had to work with the support team there to effectively move the goalposts.” Dillaway has nothing but praise for Core’s consultants. “They were very professional & very available” he adds. “A lot of this stuff was done at evenings & weekends & I can remember many phone & Lync conversations late at night.”

The results are worth the hard work. Riverstone now has a powerful & manageable Office 365 solution that delivers all the lower administration & cost efficiency benefit rates the valuable historical data that the company has built up. The company is promoting the benefits of Lync, videoconferencing & desktop application sharing internally, & is looking to explore rolling that into SharePoint during the new year.

Meeting security & compliance needs

The company also looks to make the most of the close integration of Exchange, Lync, SharePoint & Office 2010. “You go into Lync, & the calendar reflects itself in Lync” says Dillaway. What’s more, Core helped Riverstone get Office 365 working with a fleet of 50 Blackberry devices. “There are a lot of synergies happening now” he adds, “things that were a challenge under Lotus Notes”.

With Core’s help, Riverstone is now equipped to support & maintain the new solution, relying on more powerful & intuitive GUI-based tools & knowledge gleaned from training sessions & the setup process.

Despite a dramatic change in their email systems, users are happy too. “It’s been very well received” says Dillaway. “If you sat any of them down & put them back in front of Lotus Notes, I’m sure they’d react & kick back!” Office 365 isn’t just for Microsoft houses, but for any organisation wanting to move from outdated solutions into a more cost-effective, less admin-heavy cloud-based future.

Transforming business through technology

Discover our solutions and services

Do you need help developing your modern workplace?

Fill in the form to discuss your requirements with one of our specialists and get a free assessment of your environment:

What you'll get from the assessment:
  • An understanding of how your business can develop a Modern Workplace
  • Clear advice on any challenges your business may face and how to overcome them
  • A clear pathway for your business to take, with guidance on adoption and deployment

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As a UK Managed Service Provider, learn how we've helped our customers with reliable, trustworthy, and responsive IT managed services.