Skip to main content

Special Interest Groups

Functional Safety


The Functional Safety Special Interest Group (FS-SIG) is responsible for promoting awareness and understanding of functional safety topics. Our focus is the functional safety related UK and European Regulations, in particular IEC 61508 and the associated sector specific standards.  These areas continue to develop and represent significant challenges for guidance and understanding.

The FS-SIG is the body that represents the Institute in reviewing any functional safety related submissions that it receives.

The SIG is authorised to constitute working groups to help fulfil its purpose.


Members & Leadership Team

Membership is drawn from a wide spectrum including end users, regulators, vendors, contractors and consultants, so that we may represent a broad range of interests in safety related matters.  Many SIG members also belong to other professional bodies and this promotes an exchange of views and information throughout the discipline.

The SIG organises conferences, workshops and seminars and publishes material to support the FS discipline.

FS-SIG aims to have three working groups:

  1. Events & Communications WG

Responsible for co-ordination of events such as conferences and SIG network briefings

  1. Standards & Guidance WG

Responsible for contributing to development and dissemination of standards and related guidance

  1. Professional Registration WG

Responsible for overseeing the administration of the Registered Functional Safety Engineer qualification.

Additional standing or temporary working groups may be formed as sanctioned by the executive committee.

Chair: Harvey Dearden


SIG Roles & Activities

  • To provide impartial advice on behalf of the Institute on functional safety related matters.
  • To comment on any functional safety related submissions received by the Institute,
  • To liaise as appropriate with other InstMC SIGs.
  • To raise the profile of the InstMC by liaising with other bodies as appropriate
  • To organise conferences, workshops and seminars on functional safety topics, and to prepare papers for publication. These may be self-initiated, by agreement with other SIG or Local Sections, or by co-sponsorship with other bodies where appropriate.
FS-SIG Executive Committee

Harvey T. Dearden

  • Independent consulting engineer active in the process sector. Associate Engineering Director with HTS Engineering Group Ltd. Developer of SISSuite software toolset. Author of ‘Functional Safety In Practice’ and ‘Professional Engineering Practice’.

David R. Ransome

  • Retired consulting engineer Ex. Chairman and Director with P & I Design Ltd. Specialising in Functional Safety, previous member of many safety committees and work-groups. TuV Rheinland Functional Safety Expert and Registered Functional Safety Engineer.

Coin Easton

  • Independant Safety Consultant in the process and machinery sector. TuV Rheinland Senior Functional Safety Expert and CASS Registered Functional Safety Assessor at Prosalus Limited.

Steve Kriescher

  • An experienced instrument engineer specialising in functional safety in the process industry sector. Engineering Director at ICS Ltd.

David Green

  • Chartered Engineer with extensive on-site engineering experience in upper tier COMAH facilities, for more than 20 years. A qualified Funtional Safety & Machinery Safety Engineer with cross industry, full safety lifecycle experience in on-site and consultancy roles. Represents the InstMC on the Machinery Safety BSi committee MCE/3.


Get Involved

Membership of the SIG is automatically open to any individual member or Companion Company of the InstMC on application, and to other individuals and representatives of corporate bodies by agreement of the chair of the SIG or the chair of any of its working groups.  Individuals or companies wishing to join are invited to contact the chair, making clear whether or not they are InstMC members.  The only other requirement is a willingness to collaborate where a potential exists for mutual benefit.

For more information on InstMC membership, see

Knowledge sharing is key. The FS SIG webpage is the conduit for making contacts and a LinkedIn Group is available for member-only content.



Registered Functional Safety Engineer

If you are an experienced engineer working in the functional safety discipline, the InstMC Registered Functional Safety Engineer qualification could be the right choice for you. 

For more details click here!

To view the register of InstMC Registered Functional Safety Engineers click here!