Server hardware in a dark server room lit by orange and blue lights
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Since 2003( Trusted by 65+ local organisations )

Fabulous Computer
Support When IT
Really Matters

Mariner Computer Services is a Grimsby I.T. company, trading since 2003. We repair, source and build PCs and laptops, install networks, supply Avast antivirus, give remote support and build websites for homes and businesses, with more than 60 websites live.

Who We Are

Mariner Computer Services has repaired computers, installed networks and built websites in Grimsby since 2003. Today 62 live websites carry our work, for parish councils, civic societies, clubs, trades and professional firms across Lincolnshire and the Humber.

Trevor Ellis looks after computers, networks and support; J. Ellis designs and builds the websites.

What We Do

Straightforward, personal I.T. help, from choosing a new laptop to keeping your website secure.

Technician repairing a laptop motherboard with a screwdriver

Computers & Laptops

We advise on, source and build PCs and laptops from several manufacturers to get you the best value.

Network Installation

New networks designed and installed, and existing ones updated, by qualified cabling technicians.

Websites You Can Update

Responsive websites with training on our content management system supplied at no extra cost.

Antivirus & Remote Support

Avast CloudCare protection we monitor for you, and remote help on your PC when something goes wrong.

Why Choose Mariner

Fabulous computer support from people who know your setup.

Local & Personal

A Grimsby company since 2003. You deal with the people who do the work.

Remote Support

In a booked session we connect to your Windows PC with Quick Assist and fix it there and then.

Registered Avast Reseller

Avast CloudCare lets us monitor your protection and contact you when an issue is detected.

Websites You Can Update

Use our content management system yourself, with training supplied, or let us manage it for you.

Need a Hand With Your I.T.?

Call us on 07963 065354 or send a message, and we’ll get you sorted.

Websites We’ve Built

Local businesses, clubs, councils and civic societies trust us with their websites.

See the full list of 62 websites, sorted by sector.

Questions We Get Asked

Where are you based?

At 23 Grey Friars, Grimsby DN37 9QT. Mariner Computer Services has been a Grimsby company since 2003. See how to reach us.

Can you fix my computer without coming out?

We can give remote support during a booked session: we connect to your Windows PC with Quick Assist, which is built into Windows 10 and 11, and work on the problem with you. See how a remote session works.

Do you work with home users as well as businesses?

Yes. We look after computers, networks, antivirus and websites for home and business clients. See all our services.

Can I update a website you build myself?

Yes. We supply training on our content management system at no extra cost, or our managed service makes the updates for you. See websites and the sites we’ve built.

Which antivirus do you supply?

Avast. We are a registered Avast reseller and recommend Avast CloudCare, which lets us monitor your protection and contact you when an issue is detected. See Avast antivirus.

Next step: tell us what you need

Call us on 07963 065354 or use the form below. If your PC is playing up, read how a remote support session works first; if you need a website, look through the websites we’ve built.

Contact Us

Call us on 07963 065354, or send a message and we’ll get back to you. For a remote support session, call to book a time.

We only use your details to reply to your message.