Directors

John Sexton

John Sexton

Chairman

John is a mechanical engineer with a PhD in machine chatter. His professional career in industrial diamonds started in technical support with De Beers Industrial Diamond Division (now Element Six). Although the bulk of his working life has been taken up with industrial filters – culminating as an Executive Director of Porvair plc – he has never lost his fascination with the application of industrial diamonds. He owned a specialised industrial diamond tool company throughout the 1990’s, before becoming one of the founders of NDP in 2009.

Email: john@nullndp.diamonds
Tel: +353 61 360333
Mobile: + 44 7885 620011
Karl Tuffy

Karl Tuffy

Chief Executive Officer

Karl is a mechanical engineer, with a research Masters in thin-film PVD coatings for the cutting tool industry. He worked for Element Six for many years, predominantly in technical market support for the cBN, diamond and micron markets. Finally, after specialising in micron and nano-diamond products, he left Element Six in 2009 to become one of the founders of NDP.

Email: karl@nullndp.diamonds
Tel: +353 61 360333
Mobile: +353 87 9067842
Simon Peacock

Simon Peacock

Sales and Marketing Director

Simon is a Metallurgical Engineer with a PhD in rotary forging. He started work with De Beers Industrial Diamond Division (now Element Six), initially in technical support, followed by a period in sales. He then moved to an Indian diamond toolmaker as Sales Director. After this toolmaker was bought by Hilti AG, he served as CEO for a number of years before moving back to Europe. After acting as a consultant for a brief period he joined NDP in 2017.

Email: simon@nullndp.diamonds
Tel: +353 61 360333
Mobile: +44 7866 385293
Siobhan Boyd

Siobhan Boyd

Chief Financial Officer

Siobhan qualified as a Certified Public Accountant in 1993 and worked in an accounting and audit practice for 10 years. She then moved into the retail industry, combining CFO and Customer Service Manager roles. After almost 15 years within this industry, she decided to bring these areas of expertise to NDP, joining in 2013.

Email: siobhan@nullndp.diamonds
Tel: +353 61 360333
Alex Engels

Alex Engels

Process and Development Director

Alex is a Metallurgical Engineer with a Masters in composites. He started work with Element Six at their Diamond Research Laboratory (SA) and then relocated to their Shannon site in 2000. Alex then took a break from the diamond industry, working in the semi-conductor and pharmaceutical industries before spending a longer period with GE Oil and Gas as a Lead Project Manager. He returned to the diamond industry when he joined NDP in 2014.

Email: alex@nullndp.diamonds
Tel: +353 61 360333
Clement van der Riet

Clement van der Riet

PDC Business Unit Director

Clem is a Mechanical Engineer with a Masters in Materials Engineering. He started work with De Beers Industrial Diamond Division (now Element Six) in High Pressure Engineering, after which he managed the PDC R&D Programme. He was later transferred to Shannon as PDC Business Unit Manager and also lived in Houston for just under three years. After leaving Element Six in 2016, he consulted to industry on business strategy and development and process improvement, before joining NDP in 2019.

Email: clem@nullndp.diamonds
Tel: +353 61 360333