People are at the heart of our business

Established in 2002, PD&MS has built a reputation for delivering quality and safe solutions through our dedicated teams both onshore across our office locations in Aberdeen, Dundee, Great Yarmouth and Baku, as well as our hard working and experienced engineering personnel engaged in offshore campaigns.

Our senior managers take an active role in every project, working alongside each department head and their teams, all with the same core values and common goal: to provide a cost-effective service that delivers operational excellence for clients.


Dave Mackay

Dave Mackay, Executive Chairman

Dave is one of the founding directors of PD&MS and has held all senior management and executive roles since starting the business in 2002. He has worked in the marine and oil and gas industries for more than 40 years with extensive hands-on experience in both greenfield and brownfield projects. This includes engineering and commissioning, design and project engineering, and project management. Dave received formal training and professional qualifications in the Merchant Navy as a marine engineering officer, earning his Marine Engineering Second Class Certificate of Competency (MOTOR) award while working for BP Tankers.

Simon Rio

Simon Rio, Chief Executive Officer

Simon joined PD&MS in 2006 and has progressed from project engineer, operations manager, general manager, and managing director to CEO in his eight years with the company. He has more than 22 years’ experience in the oil and gas and civil construction sectors and has a proven track record in managing varying sizes and complexities of brownfield modification and upgrade projects, including fixed platform drilling facilities, production facilities and mobile drilling units.

Frank Herlihy

Frank Herlihy, Chief Operating Officer

Frank has spent two decades as a chartered accountant with 15 years’ experience in senior positions at Grant Thornton, KPMG and Dow Schofield Watts where he specialised in corporate finance. Frank joined the Wilton Group as chief financial officer in 2011 and transferred to a full time role as CFO for PD&MS following the demerger two years later. He became COO in January 2014. Frank is a Member of the Institute of Chartered Accountants In England and Wales (ICAEW), a Member of the Corporate Finance Faculty, and a Member of the Chartered Institute for Securities & Investment (CISI).

Mark Lunney

Mark Lunney, Projects Director

Mark has a reputation for successfully leading teams and delivering projects on time and within budget. His track record has played an integral part in several major roles throughout his career and prior to being one of the founding directors of PD&MS in 2002, Mark was part of the small team responsible for the design and construction of the BP Clair Drilling Facility where his confident management of multiple international vendors ensured drilling equipment was delivered in line with the requirements of this major project. Mark cites the successful growth and development of PD&MS as his proudest achievement since beginning his career in the oil and gas industry over 20 years ago.

Ken Pearce

Ken Pearce, Construction Director

With a career spanning more than four decades in the oil and gas industry, Ken helped establish PD&MS in 2002 and now runs both the MODU and construction departments within the business. He previously held the position of piping department head at Inter Project Resources where he worked for 15 years. Ken also has extensive project management experience in the Middle East, Europe and Asia.

Norman Murray

Norman Murray, Operatons Director

Norman has more than three decades of experience in the oil and gas industry in the UKCS, Western and Central Europe, as well as Azerbaijan regions. He has over 23 years’ experience in project management, development, implementation, execution and construction management, covering both a wide range of small modification work to large scale Brownfield EPC campaigns. During these capital intensive projects he oversaw the work from bid to conception, and the engineering of offshore projects. Prior to joining PD&MS in 2012, Norman worked with a major international drilling contractor, where he held a number of senior management roles.

Ken Brebner

Ken Brebner, Executive Director, Strategy and Growth

Ken’s 30 year career in the oil and gas industry began in the drilling sector at Dan Smedvig. Before joining PD&MS in March 2015, he was responsible for business development activities across Europe for Amec Foster Wheeler. Ken has held a number of senior roles offshore in the UKCS before moving into a number of onshore based positions. During his time working in the industry Ken has developed an infinite knowledge across a number of key disciplines including business development, commercial, brownfield engineering and asset management. He is an active member on a number of industry bodies including the Energy Industries Council and the Offshore Contractors Association.

Kevin Peake

Kevin Peake, Engineering Director

Kevin joined PD&MS in September 2014, quickly progressing to Engineering Director in October 2015. Holding over 35 years’ experience in the oil and gas industry, Kevin started his career in Piping and Mechanical engineering design moving into management positions and gaining over 20 years’ experience of managing multi-discipline teams of engineers and designers, in the UK and numerous overseas locations. He has a proven track record of delivering technically sound design in compliance with standards and procedures, whilst ensuring best design practices are considered to allow safe and efficient operation and maintenance across multiple EPC projects, covering Greenfield and Brownfield projects. Kevin holds a ‘Master of Engineering’ Degree and BSc (Hons) in Mechanical Engineering, Kevin is also a Chartered Engineer and Member of the Institute of Mechanical Engineers.