Mudloggers are normally based offshore to collect and monitor information from drilling operations and rock samples using a variety of equipment and laboratory techniques. The information gathered is passed on to the drilling team for operational purposes. Usually based on a drilling rig or platform for two or three weeks at a time, followed by two of three weeks rest period onshore. Work is undertaken on a shift basis day and night, usually working 12 hours at a time.

About this role

Typical duties

  • Collects, processes, logs and analyses rock samples collected from drilling operations
  • Monitors computer recordings of drilling activities
  • Uses a computer to interpret and analyse information and shares this with the drilling team on a regular basis
  • Carries out on site maintenance as required
  • Prepares written reports as required by the drilling team or operator
  • Reports any breaches of safety procedures to supervision / management
  • Actively participates in and promotes company health and safety campaigns, policies and procedures, and ensures personal safety and that of colleagues at all times
  • Provides support as part of the drilling emergency response team

In the industry

Works closely with drilling engineering and completions teams, to drill for oil and gas in new or existing fields. Mudloggers can be employed onshore or offshore, and are typically hired by specialist drilling and well services companies that provide contracted services to the operating companies. Mudloggers support the Data Engineers / Crew Chief by collecting rock samples and carrying out analysis of the samples. The role is integral to the exploration and production process.


  • Office
  • Outdoors
  • Offshore


  • University
  • College
  • Apprenticeships

What do I need?

Key Skills

  • Team working
  • Verbal communication
  • Written communication
  • Problem solving
  • Analysing
  • Planning
  • Organising
  • IT
  • Numerical
  • Practical
  • Creativity
  • Working to deadlines
  • Flexibility


Entry requirements:

  • HND or equivalent in relevant subject with relevant work experience
  • Degree in relevant subject (e.g. Geology) or equivalent
  • Basic offshore induction and emergency training (BOSIET)
  • Offshore Medical Certificate
  • OPITO Minimum Industry Safety Standards (MIST)

Employers might also look for:

  • Basic offshore induction and emergency training (BOSIET)
  • Offshore Medical Certificate