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Once granted, the certification is valid for three years. In order to maintain the certification, certified individuals must demonstrate compliance with certification renewal requirements during their three-year certification cycles. To qualify for renewal of your certification by PDUs rather than by re-examination, you must show evidence of ongoing, related professional development and work experience and achieve the minimum PDUs required for your specific certification.

| Member/Partner Fee | Non-Member/Partner Fee | Required PDUs | Submit Application | Renewal Fee | |
|---|---|---|---|---|---|
| PSC Level 1 | $60 | $80 | 20 | PSC-1 Renewal Application | PSC-1 Renewal Fee |
| PSC Level 2 | $75 | $100 | 20 | PSC-2 Renewal Application | PSC-2 Renewal Fee |
| PSAP | $220 | $185 | 30 | PSAP Renewal Application | PSAP Renewal Fee |
PDU – The term PDU is an abbreviation for Professional Development Unit. PDUs are awarded for experience, training, presentations, published papers and other approved activities as determined by the Hydraulic Institute.
Evidence – Documentation that clearly shows that you participated in a claimed activity. It must include the date(s) of the qualifying activity, topic, organization providing the activity, and qualifying hours. Acceptable documentation includes, but not limited to: certificate of attendance, letter from the organization stating your participation, log-in sheet signed by the attendee and provider, an agenda or program signed by the provider verifying participation.
Training
Certified individuals can claim one (1) PDU for each hour of training for attending formal classes from recognized training organizations. Certified individuals must achieve at least eight (8) PDUs in this category during the three-year renewal period. Other verifiable supervised training with a defined syllabus, training materials, and competent instructor may be considered, however, evidence of such must be provided with this application for consideration. If you claim PDUs for a non-recognized class, you must present evidence of the class, including, a syllabus, samples of class materials, number of hours of instruction time, the timeframe over which it was provided (e.g., 4 hours of instruction), the dates and location of the training, and proof of attendance and completion for consideration.
Teaching Classes
Certified individuals can claim one (1) PDU for each hour of teaching for teaching verifiable formal training classes on related topics with a defined syllabus and appropriate training material. PDUs are not awarded for informal training sessions, informal classes, or ongoing mentoring. If you claim teaching PDHs and it is not for a recognized training organization and a published course, you must present evidence of the class, including, a syllabus, samples of class materials, number of hours of instruction time, the timeframe over which it was provided (e.g., 4 hours of instruction), the dates and location of the training, and the number of class attendees for consideration.
Repeating a Class
PDUs for attending or teaching the same class/training are only granted once per year (i.e., at least 1-year between occurrences). PDUs for attending or teaching the same class subsequently are earned at 50% of stated rates. For example, an 8-hour class earns 8 PDUs. If it is repeated a year later, it earns 4 PDHs.
Certified individuals can claim one (1) PDU for each hour of self-directed learning, such as on-demand webinars and self-paced e-Learning courses, on appropriately related topics. Certified individuals may earn a maximum of ten (10) PDUs in this category during the three-year renewal period.
Certified individuals can claim up to five (5) PDUs per year for work as a PSO professional.
PDUs are awarded at the following rates:
•0 PDUs for less than 10% of time spent on appropriately related work
•1 PDUs for greater than 10% of time spent on appropriately related work
•2 PDUs for greater than 25% of time spent on appropriately related work
•3 PDUs for greater than 40% of time spent on appropriately related work
•4 PDUs for greater than 60% of time spent on appropriately related work
•5 PDUs for greater than 80% of time spent on appropriately related work
Certified individuals can claim one (1) PDU for each hour of volunteer service. Examples of volunteer service include, but not limited to: volunteering on Hydraulic Institute committees related to PSO and PSAP committees. Certified individuals may earn a maximum of ten (10) PDUs in this category during the three-year renewal period.
Certified individuals can claim PDUs for activities spent on authoring original articles and papers in recognized technical publications, and technical presentations at recognized conferences on PSO-related topics. Certified individuals may earn a maximum of ten (10) PDUs in this category during the three-year renewal period.
PDUs are awarded at the following rates:
•2 PDUs per technical presentation
•3 PDUs per published article/paper
•5 PDUs for a paper both published in a recognized technical publication and presented at a recognized technical conference
A copy of a presentation or paper by itself does not constitute valid evidence. You must include proof of where it was presented or published, the date, and a way to verify that information, e.g., conference program, proceedings listing, or publication table of contents.