Registered Scientist (RSci)

Becoming a Registered Scientist allows you to use the post-nominal letters “RSci” after your name, highlighting your level of knowledge and expertise to your employers, colleagues, and customers.

Registered Scientist (RSci)

Registered Scientists can be found in a huge variety of scientific and higher technical roles. They apply their skills and knowledge whilst working autonomously and have the ability to resolve problems and identify, review and select appropriate techniques, procedures and methods.


There are thousands of scientists in the water industry, working in a wide variety of roles for water companies, regulators and across the supply chain.

“During my RSci submission, I used my CPD and competency report to help me progress into a new role as a Supply Support Manager. The professional recognition I have achieved has left a residing feeling of pride and accomplishment which I know will help me in pursuing chartership and progressing my career.”


Ivan Rozmetanyuk RSci, Supply Support Manager, Anglian Water

Why become a RSci?

Bonnie Wilson, Teaching Laboratory Assistant at the University of Bristol, tells us about her experience of becoming a Registered Scientist (RSci).

Click to view this case study from the Science Council.

Who can become a RSci?

Registered Scientist registration is open to anyone who can demonstrate the competencies required by the Science Council, and who is willing to abide by their Code of Conduct.


Each of these competencies are broken down into specific attributes which all Registered Scientists are expected to have. Before you consider applying for RSci, you should be familiar with the competencies required by the Science Council.

How to become a RSci


Before starting your application, read the RSci Standards authored by the Science Council that explains the competence standards required of a Registered Scientist. 

Once you are ready to begin your application, download the RSci Application Form and the Applicant’s Short Guide and follow the process outlined in the guide. 


All candidates for registration as a Registered Scientist must be members of a professional body such as IWater.  As part of your application, you will be asked to produce a copy of your CPD record. 


Professional Review Fee for Registered Scientist (RSci) £168


Initial Registration Fee (remitted to the Engineering Council and will covers registration until your next membership renewal date) for Registered Scientist (RSci) £22.90


Annual Renewal Fees (remitted annually to the Engineering Council to maintain the Registration) for Registered Scientist (RSci) £22.90

Contact Us

For guidance and advice on Professional Registration please email and our dedicated Professional Registration Manager will be happy to help you.