May 14

Become a CFSP or CFSE

I often get asked how to become a CFSP or CFSE; a certified professional for functional safety.  Well, here's a blog that explains the background, what your options are, and how much preparation time you'll need to put in to become a CFSE or CFSP.

Become a CFSP or CFSE - The history

Two functional safety certification companies set up the Certified Functional Safety Expert (CFSE) program in the early 2000s.

The stated purpose was "to ensure that personnel performing SIS life-cycle activities are competent as required by the IEC 61508, 61511, and 62061 standards."

Since the two founding companies had an undisclosed disagreement after just a few years, the program now gets administered by only one of them.

Well, let's not be coy about whom I'm talking; the original founding certification companies were TÜV SÜD and Exida. 

This much, at least, is public knowledge on the CFSE website. The fall-out was never generally acknowledged, but suffice it to say, each company now promotes its preferred program.

What are the differences between CFSP and CFSE?

The CFSE board now offers two functional safety certifications:

  • CFSE - the original "Expert" level - intended for people with ten (10) years or more experience.
  • CFSP - a "Professional" level - open to people with only two (2) years of related experience.

In both cases, the number of years of required experience can get reduced by existing relevant qualifications.

Can becoming a CFSP or CFSE make you competent?

I took the CFSE (process applications) exam back in 2004. My knowledge of functional safety projects was from implementing programmable logic solver systems in safety applications.

Since 2004, I have worked on many functional safety projects and a much broader scope. I would say that I am still not fully competent in aspects of the safety life-cycle. This "conscious incompetence" is a good thing. It should mean that I understand my limitations, like we all should.

Having established that competency is a far broader subject than any short training program can solve, is the CFSP or CFSE worth it? Well, yes, I think it still is.

Why CFSP and CFSE are still worth it

The CFSE / CFSP program is an industry-led program, and as such, it does try to focus on more practical applications than your average University or College course.

You can study to attain a CFSP or CFSE in process safety applications, machinery safety, safety hardware, or safety software development at the time of writing.

The specialisms are essential because the different standards and their applications are not identical.

Automotive safety (ISO 26262) is also a growing specialism, although my practical experience is limited.

How do you prepare for an exam?

Preparation for any test or exam is a very personal thing. Some prefer to study over a long period, and some prefer the "cramming" method. Either way, some preparation is required for CFSP and CFSE exams. 

Even if you have many years of experience, I do not recommend that you attend an exam "cold" or without substantial preparation.

There is no requirement to take any formal training to attend these exams. In other words, you can self-prepare by reading the functional safety standards, recommended books and working through exercises.


The standards you will need to get your hands on will depend mainly on your planned functional safety specialism.

Process Applications

Machinery safety

Safety hardware development

Safety software development

IEC 61511 - All parts

IEC 62061

IEC 61508-1

IEC 61508-1

IEC 61508-1

ISO 13849-1

IEC 61508-2

IEC 61508-3

IEC 61508-2

ISO 12100

IEC 61508-4

IEC 61508-4

How well will you need to know these standards before taking the test? The answer to that question largely depends on whether you are studying for the CFSP test or CFSE.

For both tests, you will need to know the structure and contents of the relevant standards for your chosen specialism so you can find information quickly.

However, you will not need to memorise everything. Both CFSP and CFSE tests are "open book". Have the standards with you for reference, but you do not have time to open them and start learning the contents during the exam!

Other study resources

Online training courses are a more modern way of preparing than purchasing hard-copy books. You should be able to study on the move, from a laptop, tablet or even a modern smartphone, without the need for carrying books around with you.

With the right online course, it should be possible to get assessments quizzes and tests similar to questions you would get in the CFSP test or CFSE exam.

The online SIS and functional safety course from eFunctionalSafety is a great way of preparing before attending a CFSP exam (process applications specialism). It takes 12 to 18 hours to complete in full and includes an independent IChemE accredited certificate with an 18 CPD hours award.


In conclusion, CFSE and CFSP are useful indicators of competence with functional safety, albeit not the full story. Engineering and related qualifications are still relevant. Practical experience remains crucial.

About the author

Jon Keswick, CFSE

Jon Keswick is a Certified Functional Safety Expert (CFSE) and founder of eFunctionalSafety. Feel free to make contact via Linked-In or comment on any of the eFunctionalSafety blog pages.

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  • I am a safety professional with limited knowledge in application of process safety in the oil and gas industry. I am interested in becoming a CFSP by undergoing a structured course. How can this course help me in improving my Process Safety capability as well as deal with oil and gas offshore platform safety system? Kindly put me true as I take enrolment decision.

    • Jon Keswick, CFSE says:

      Thanks for your interest. We have sent you a login to trial one of our online courses.

  • I am a full-time industrial control systems and SCADA specialist in utilities, with some understanding but no formal training except a foundation course in IEC 61508. That course (not one of yours) was rather crammed, had no real practical exercises whatsoever, and had no exam at the end. Head knowledge is no use. I need a practical course, if I am to gain skills relevant to my employer. Can you please recommend an approach for someone with relatively little electrical knowledge other than control panel design and implementation?


    I am working as a Process engineer with 15 yrs of experience in Engineering Design & Consultancy for working on Oil & Gas projects like Concept Study, FEED & Detailed Design.

    I have attended several HAZOPs.
    I am interested in Process Technical Safety so can I eligible to give this Exam or to do any other Certification before it.
    Please advise.
    Thanks in advance.

    Thanks & Regards,

  • Greetings, I am presently employed as a Health, Safety, and Environment Advisor within the Oil and Gas Industry, specifically in the areas of construction and maintenance, accumulating over a decade of experience in this role. My educational background includes a Bachelor’s degree in electrical engineering, and I am presently in the process of attaining a Higher Diploma in Occupational Health and Safety. However, I have observed that the Occupational Health and Safety field appears to exhibit limited growth in comparison to other sectors. It seems somewhat static. On the other hand, the Functional Safety sector appears to be much more intriguing and diverse, spanning across various industries. I am curious to know whether someone with my background can transition into the Functional Safety field and whether I possess the qualifications necessary to pursue a Certified Functional Safety Professional (CFSP) designation.

    • Jon Keswick, CFSE says:

      Hi, I’m sorry I missed this message some time ago. It sounds to me like you have the ideal background for transitioning to functional safety and studying for the CFSP with electrical engineering background. You could also take an online course at Best wishes!

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