About Us

David Sparkes

David Sparkes CEng, BEng (Hons), MIChemE


David’s background is in Chemical Engineering, having been a Chartered member of the IChemE since 2005.

After graduation, he cut his teeth working on plant support and development projects for Croda Chemicals in Yorkshire. From there, he moved to ABB Engineering Services in 2003, joining a team delivering capital projects and consultancy for clients throughout Scotland, mainly in pharmaceuticals and whisky production. His specialisms are Plant Design and optimisation, Process Safety and Process Control, and he is a registered TÜV Functional Safety Professional (certificate number TP16051167).

David became an independent contractor in 2008, working on a range of different Process Engineering and Automation projects in the Agrochemical Industry, before joining forces with Danny in 2014 to form Process Logic.

Danny McKellar

Danny McKellar BEng (Hons), MIET


Danny started his career as a Control/Electrical apprentice at Lever Brothers on the Wirral. At the age of 25, Danny chose to further his Education studying Electrical Engineering at Sheffield University, graduating in 1998.

Since then, Danny has worked exclusively in the field of Automation and Control Systems working for System Integrators and end Clients delivering both Process Control System solutions and packing hall automation. Danny says:

“From a systems point of view I think my expertise is in understanding the whole picture from the Raw Ingredients arriving on site to the finished product leaving on a pallet.”

Fiona Callis

Fiona Callis BSc


Fiona has been with Process Logic since January 2015, but she has been working with Danny and David for 5 of past 8 years. Fiona is the highest calibre of Engineer and can be relied upon to step back, evaluate and implement a design to the highest standard. Asked to describe herself, Fiona says:

“I am a versatile CONTROL SYSTEMS ENGINEER with over 15 years experience in the managing, design, implementation, testing and commissioning of a wide range of DCS, ESD, F&G and process control systems in the Oil & Gas, Chemical, and Food & Beverage sectors. Easy going by nature, and able to get along with work colleagues and managers. I am able to rise to the challenge and make an effective contribution to a project or organisation.

Richard Price

Richard Price MSCE


Richard has been with Process Logic since mid-2014 and is a great Systems, Platforms and Networking resource for us. He first found his “techy” side when he was serving with HM Armed Forces and went on to gain significant Client/Server, IT/IS Systems Infrastructure and Networking (TCP/IP) experience with IBM and others in the early to late 2000’s. Richard says:

“I’m enjoying the opportunity of getting into something which is a little different for me. There’s a great team ethic and atmosphere at Process Logic and my communications and IT platform skills certainly compliment the engineering and industry expertise within the company.”