Founded in 1981, TMS have been developing software for over 40 years.

Thom Micro Systems

As a family business, we believe that caring for our employees and creating a harmonious and productive working environment is as important as looking after our customers.

Through our partnership approach, our team of experts work to understand your requirements and provide solutions that will give you the knowledge, confidence and software to deliver long-term business growth, efficiency, profitability and increased in-house capabilities. We develop long-term relationships with our customers based on trust, honesty and integrity.

Integration Specialists - our software expertise in Sage, SolidWorks, AutoDesk and our own TMS software, makes us uniquely suited to providing an integrated software solution for your entire business.

Sage Developer Logo
Sicon logo
Autodesk Reseller logo
SOLIDWORKS Reseller logo

Contract Costing Management Team

Gareth Thom

Gareth Thom

Director of Software Development

Software Architect of Contract Costing with over 25 years of professional software development experience. An expert in construction industry business processes and data analysis, combined with a passion for quality software and the future of Contract Costing.

Alastair Thom

Alastair Thom

Finance Director

Chartered accountant with several years experience in practice both in the UK and US; now with more than 10 years experience in leading ERP implementations & using his accountancy knowledge and business acumen to provide consultancy services to our clients.

Neil Johnson

Neil Johnson

Senior Business Consultant

A qualified accountant (CIMA) and Project Manager (Prince 2 & PMBOK PMI) with a wealth of experience in ERP implementations, business transformations, process improvements, business intelligence, finance, project budgeting and risk assessment.

Jonathan Frye

Jonathan Frye

Software Development Manager

Lead Developer in charge of both the software development team and keeping TMS at the cutting edge of emerging and future technologies. Extensive experience of working directly with clients to understand their requirements and produce innovative solutions to business problems.

Our Mission

Our industry experts build long term relationships with our customers to ensure they have the correct business software and services to increase productivity and facilitate growth.

Our Vision

Our vision is to be the foremost provider of quality construction software and services in the UK and Ireland.

Our Values


We can be trusted to act in the best interests of our customers, giving honest and impartial advice, proactively building long term partnerships based on honesty, integrity and mutual respect.


We strongly believe that by combining our skills, knowledge and experience and working together as a team towards a common goal, we can provide a better, more tailored service for our customers.


We provide innovative solutions to our customers’ problems using technology and industry expertise, continually looking for ways to improve.


We can be depended upon to provide exceptional customer service, using our industry experts to resolve issues quickly and efficiently, often going above and beyond in the pursuit of the best possible outcome.


As a family business, we believe that caring for our employees and creating a happy working environment is equally as important as looking after our customers.