About Us

About Us

Ellexus is the I/O profiling company. From a detailed analysis of one application or workflow pipeline to whole-cluster, lightweight monitoring and reporting, we provide solutions that solve all I/O profiling needs.

Our tools provide unique insights into how big data storage clusters are working, enabling IT managers and high-performance computing engineers to multiply productivity and save millions on wasted engineering time. We work across many high-performance and scientific computing sectors, including the semiconductor industry, life sciences, bioinformatics and oil and gas. 

Customers include ARM Holdings, the Sanger Institute, Cancer Research UK, Mentor Graphics and Cadence. 

Ellexus is based at St John’s Innovation Centre in Cambridge, UK, the home of a large number of well-known technology companies. This location gives us access to world-class scientists and engineering talent and the space to grow.

The Ellexus leadership team



Rosemary —— Chief Executive Officer

Dr Rosemary Francis is the founder and CEO of Ellexus. Rosemary obtained her PhD in Computer Architecture from the Cambridge University Computer Lab after studying computer science at Newnham. After working in the chip design industry, Rosemary founded Ellexus to help manage the complex tool chains needed for semiconductor design and the company  has evolved ever since.

Rosemary is on the board of IdeaSpace, is a member of the Raspberry Pi Foundation and is a frequent speaker at IEEE and Cambridge University. She is often asked to speak on panels at business events around the world, most recently being flown to Zagreb, Croatia to be the keynote speaker at a British Council event focused on women and entrepreneurship. Rosemary has also frequently represented the Cambridge start-up community at high-profile meetings, such as providing advice on innovation to then-Prime Minister David Cameron in 2014 and to delegates from the Dutch government in 2015.

Felicity Pitchers

Felicity —— Co-founder and Chief Operating Officer

Felicity has been a Director at Ellexus since 2010 and joined the team full time as COO in April 2015. Felicity is an experienced editor, journalist and communications manager, having worked on a variety of business magazines and in communications departments both nationally and internationally. At Ellexus she brings an outward-looking view to the table and pushes our standards ever higher.


John  —— Finance Director

John qualified as a Chartered Accountant in 1977. He founded Lindeyer Francis Ferguson, Chartered Accountants, and was senior partner for many years. He continues part time as a consultant following recent retirement. John does a good deal of work with the charitable and not-for-profit sector, and was one of the first to be awarded the Diploma in Charity Accounting. He is Chairman of Canford Group plc, another long-established association, so brings 40 years of business experience to Ellexus. His love of music shapes his involvement in the community; he is a Parish Councillor, a choirmaster, Vice-Chairman of The Ralph Vaughan Williams Society and Managing Director of its subsidiary, Albion Records.


Ville  —— Senior Software Engineer

Ville joined Ellexus in 2016 as Senior Software Engineer. He has more than 20 years of experience as a software engineer in both commercial and scientific sectors working for European Bioinformatics Institute, Capita, Illumina, Nokia and others. Recently Ville has created software solutions for large-scale data archival, storage virtualisation, workflow management and other infrastructure services. His background helps Ellexus to understand and solve I/O, metadata and storage system related problems in HPC environments. Ville’s goal is to continue to create innovative products that make a difference for our customers.

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Ellexus Ltd
St John’s Innovation Centre,
Cambridge CB4 0WS, UK
Tel: +44 (0)1223 42 16 46 UK
Email: info@ellexus.com