About Us

Websites that work

Mannix has been creating websites that work since 2008. That means we make the effort to understand your business and build a website that delivers what you want. We aim to develop websites that have well-written content, are easy to find, easy to use and have a great design.


Great customer service

Feedback from our clients shows that one of the things they really appreciate is our level of customer service. We’ll make sure we really understand what your requirements are. We’ll keep you up-to-date with progress on your website and respond quickly and fully to any of your questions or requests.


A collaborative approach

At Mannix we believe in building websites together with you. You know your business objectives, understand your audiences, and need to live with your new website for years to come.


Plain speaking & honest advice

We won’t bamboozle you with technical language – instead we will explain things in plain English with no jargon. We pride ourselves on giving honest advice and if we think it won’t work for you we’ll tell you so.

Who we are

John Sargent

John Sargent

John Sargent founded the web design company SiteWriters in 2001 and took over Mannix Web Design in 2015. SiteWriters worked almost exclusively with the charity and NGO sectors with an extensive past client list that includes projects completed for Oxfam, Amnesty international, The National Council for Voluntary Organisations (NCVO), The British School at Rome, Conciliation Resources, The Royal Courts of Justice CAB and many others.

Fot the past 3 years John has worked with Dermot Kennedy, founder of Mannix Web Design on a number of joint projects. He is an experienced WordPress developer and has advised many organisations on social media strategies to enable them to better utilise a range of social media outlets including Facebook, Twitter, Flickr and Pinterest.


Dermot Kennedy founded Mannix Web Design in 2008. He led on the design of more than 50 websites before deciding to retire in early 2015. He worked with John Sargent on several projects and has first hand knowledge of John’s skill in web design and website promotion. He is more than happy to transfer the business to him, confident that it will continue to thrive.