Since our foundation in 1980, the key to our success has been the academic and technical excellence of our staff and a strategy of sustainable growth.

2017  Tessella is listed in The Sunday Times Top 100 Small Companies to Work For, at number 76

2016  For the fifth year in a row, Tessella has been rated as an “outstanding” place to work in the Sunday Times Best Companies awards

2015  Tessella is acquired by Altran, a global leader in innovation and high-tech engineering consulting, to become its World Class Center of Excellence for Analytics

2014  Tessella launches dedicated digital preservation company, Preservica

2013  Houston TX office opens

2012  Tessella goes through management buy-out

2011  Tessella & The National Archives (UK) receive Queen’s Award for Innovation for digital preservation technology

2009  Staff numbers exceed 200

2005  Tessella acquires Analyticon and with it, a new office in Stevenage

2004  Washington DC office opens

2003  First US office opens in Boston MA; Tessella Inc. is created

2001  First overseas office opens in Den Haag, NL

2000  Burton upon Trent office opens

2000  Staff numbers exceed 100

1998  Warrington office opens

1995  Tessella becomes Investors In People accredited for excellent dedication to staff training and development

1992  Tessella gains BS (EN) ISO 9001 certification for high quality software engineering practices and processes

1991  Staff numbers exceed 50

1987  First office opens in Abingdon

1980  Tessella formed by Kevin Gell