Our Team

Find out more about some key members of our experienced team.

Mark Hazell
Managing Director

A Process Engineer by background, Mark has worked in Operations and Projects roles within the Oil and Gas industry for over 30 years.

He is a thorough, capable, pragmatic engineer who thinks laterally, often coming up with ideas and options that others haven’t thought of.

As an honest, straight-talking professional, he values the independence of Opus Oil and Gas, knowing that it means he can truly act in the best interests of his clients.

Key experience and qualifications:

  • Director, Vision Oil and Gas
  • Deputy Project Director, Petro-Canada
  • Regional Facilities Engineer, Petro-Canada
  • Director, DMS
  • Project Manager / Principal Engineer, CDS
  • Production Superintendent, BHP Petroleum
  • Senior Facilities Engineer, BHP Petroleum
  • Commissioning Manager, ICI C&P
  • Operations Manager, British Gas
  • Chartered Engineer (CEng)
  • Member of the Institution of Chemical Engineers (MIChemE)
  • Natural Sciences + Chemical Engineering – MA Hons,  MEng (Cantab.)
  • Petroleum Engineering – PgDip (Heri.)
Polly Roberts
Project Administrator, Opus Oil and Gas

Organised, experienced and adaptable, Polly has been an Administrator in the Oil and Gas Industry for over 10 years. As a valued team member, she is a safe pair of hands supporting projects and managing the office.

Key experience and qualifications:

  • Project Administrator, Vision Oil and Gas
  • HR Administrator, Petro-Canada
  • Project Secretary, Petro-Canada
  • Primary school teacher
  • City and Guilds Bookkeeping and Accounts
  • PGCE Primary Education
  • BA Hons Sociology
Dr Kevin Williams
Consultant Subsea and Pipeline Engineer

With over 35 years of engineering experience in Oil and Gas, Kevin has worked on challenging subsea and pipeline projects all over the world. He has delivered projects for operators, installation contractors and design houses. Logical, considered and with an unerring ability to manage design so problems are avoided later, Kevin is highly sought after in his field.

Key experience and qualifications:

  • Consultant, Opus Oil and Gas
  • Consultant and Engineer, Finlaggan Development
  • Project Manager, Petrofac
  • ITT preparation and engineering management, RWE’s Topaz Infill Well Development
  • Engineering support to EOG’s Conwy Field development
  • Feasibility Assessment and Cost Estimation for prospects for Zennor, MPX and Alpha Petroleum
  • BSc Hons Civil Engineering, Imperial College, London 1981
  • PhD (Dissertation: Determinacy and Mode Interaction in Elastic Systems), Imperial College, London 1984
Chris Hayes
Project Controls Consultant

With over 40 years in the industry, Chris really understands projects; amongst his colleagues, he has a well-deserved reputation for his formidable knowledge and experience. Chris is a versatile, practical, project controls engineer, whose skills include project management, planning, estimating, cost control, and risk analysis / management. He has extensive management experience, has worked in both onshore and offshore environments, and can manage projects throughout the Development Cycle.

Key experience and qualifications:

  • Project Controls Consultant – Opus Oil and Gas
  • Project Controls Consultant – Vision Oil and Gas
  • Project Controls Consultant – Petrocanada
  • Manager of Project Controls – Genesis Oil and Gas worldwide
  • Manager of Project Controls– ABB Lummus Global worldwide

Manager of Project Controls– ABB Lummus Global Netherlands.

John Marlow
Materials and Welding Consultant

Modest, professional and highly knowledgeable, John has over 50 years’ of industry experience. A Chartered Engineer, he has spent the last 35 years focusing on metallurgy, corrosion, welding engineering, construction, non-destructive examination and quality assurance/control for both on and offshore oil and gas developments. He is a subject matter expert with an enviable amount of knowledge and experience.

Key experience and qualifications:

Recent experience:

  • RWE Topaz
  • RWE Windermere
  • EOG Conwy
  • Zennor Finlaggan
  • TAQA Cladhan
  • ConocoPhillips Jasmine


  • FREng
  • MSc Sheffield
  • CEng
  • Int PE
  • Eur Ing
  • FWeldI.