James Ridsdale

Managing Director


James is the founder and Managing Director of dataJAR and has worked in the Apple space since 1997 (when Macs were beige). Throughout his career James has worked in enterprise through to consulting.

He’s managed teams of engineers before turning his hand to his own business 2013. Both commercially and technically astute, James has sound understanding of Apple technology and how to implement it at any scale.


Mark Tsuchihashi

Sales Director

Mark has been in sales for over 20 years and is now Sales Director at dataJAR. He is responsible for key relationships, account managed customers and also new business. He’s passionate about Apple and the customer journey.


Ben Toms

Technical Director

Ben joined dataJAR in 2015 as a Systems Engineer and was promoted to Technical Director in 2017.

He’s been tinkering with Macs for 15 years, from OS 9 in music studios through to administering enterprise Mac and mobile environments.

Throughout his career he’s leveraged the brain trust that is the Apple Admin community, also founded London Apple Admins and have given back via his blog (, the blog with the tag line: “Doing the donkey work, to make you look like a smart ass!”

He’s been awarded a Deanship at the JAMF Nation User Conference (JNUC) for his contributions to the JAMF Nation community.

He is an admin for on Slack and have released a few open source projects such as AutoCasperNBI and AutoImagrNBI, as well as becoming the maintainer of ADPassMon.


Richard Mallion

Systems Engineer

Richard Mallion has worked in the IT industry for many years and eats, sleeps and breathes Apple. He began his tech journey as a junior developer and later moved into a support role specialising in integrating Macs into PC networks. During this time he had the privilege of working for a number of high profile Apple centres in London.

Before joining dataJAR earlier this year, Richard had been Soho based for the past two decades, working for Amsys, the go-to organisation for Apple training in the UK.

Richard is an authorised Apple trainer, having gained the Apple Master Training certificate and also delivers the CCT course for Jamf.


Madeleine Cordrey-Jones

Operations Manager

As dataJAR’s operations manager, Maddy brings quality assurance, analysis, strategy and management skills, all of which compliment the extensive technical abilities already in existence within the team.

Prior to joining the company, Maddy single-handedly set up and established two businesses in the catering industry. She acquired further skills during her time working in aerospace engineering and information management.

Outside of work, Maddy is currently studying a part time degree in economics with the Open University. She is also a keen traveller and has been involved in helping develop small businesses in Africa.


Chris Tomsett

Business Development Manager

Chris began his Apple journey by introducing iPad solutions to both education and commercial customers. He delivered the first Apple Free School in 2010 and has been heavily involved in the roll-out of numerous, large scale one-to-ones throughout his career.

He also has three years’ experience selling public and private cloud-hosted solutions and services to commercial, media and government customers.

Chris brings to dataJAR a sound knowledge of business and sales strategy, complimenting our team perfectly.

Aside from his exceptional sales skills, Chris has produced music for almost two decades and his passion for DJing has taken him around the world.


Darren Wallace

Systems Engineer

Darren has been tinkering with Macs on a professional level for more than 12 years. He started as a fresh-faced hardware repair trainee and has fond memories of iBook G4 Logic Board repairs! Over the years, he progressed on to executive relations and eventually consultancy.

In the latter part of his career, he worked with directors at Amsys (now Moof IT) to expand and develop their professional services department, delivering and managing technical projects.

He saw through the entire project from initial discussions, to technical planning and delivery, as well as long term support.

Along with Ben Toms (Technical Director) and other pillars of the Apple community, Darren helps to run London Apple Admins, and is keen to share his technical knowledge through a range of blogs.

During downtime, he is your typical geek and can be found with his head in books, both of the comic and traditional variety, video games and television shows.

When he does venture out, you’ll find him happy in his local, ale in hand.