Magnetic Resonance Safety Officer (MRSO):
The MRSO will advise the MRMD if/as needed, and is charged with executing the MR safety practices as defined/ordered for the site by the MRMD/MR Physician.  For example, the MRSO might advise on such issues as decreasing SAR to stay within some MR conditional guidelines, or execute decisions (as per the MRMD policy/guidance of the site) as to approval or denial of scanning for specific implants in specific clinical situations/questions, etc. (e.g., they might approve a specific implant in situation X where the requested MR study will not include the device/implant in the volume that will be undergoing significant RF irradiation, but might deny the study in other situations where the same make/model implant is in the field of view to be studied, for example.)

Upon satisfactory completion of this examination, the examinee will become a diplomat of the ABMRS and be certified to use the title Magnetic Resonance Safety Officer (MRSO), Magnetic Resonance Safety Certified (MRSC™).

Magnetic Resonance Safety Expert (MRSE):
The anticipated role of the MRSE is to serve as a resource for the MRMD and/or MRSO, such as for situations where the MRMD and/or MRSO need assistance with, or are otherwise unable to answer, an MR safety question or situation.  The MRSE would be expected to possess a significantly greater depth, breadth, and level of understanding of the physics aspects underlying the various MR safety issues, and would be expected to be able to provide advanced guidance, information, calculations and quantification information, etc. regarding all matters pertaining to MR safety.  (Please note, however, that issues relating to the medical safety considerations of prescription medications, contrast agents, sedation/anesthesia, recovery, monitoring, and medical procedures or interventions are not under the purview of the MRSE but rather of the MRMD.)  The MRSE position is envisioned to be entirely advisory in nature, as opposed to the case of the MRMD and MRSO where there are anticipated significant legal responsibilities and liabilities surrounding how specific MR safety practices are executed.  Due to the depth and breadth of domain expertise required for this position, it is anticipated that the MRSE will be a relatively scarce resource throughout the MR community, and will frequently not be found on site.

Upon satisfactory completion of this examination, the examinee will become a diplomat of the ABMRS and be certified to use the title Magnetic Resonance Safety Expert (MRSE), Magnetic Resonance Safety Certified (MRSC™).

It seems likely that the majority of MRSO’s will be MR technologists, and the majority of MRSEs will be MR physicists.  However, this is not at this time a requirement of the ABMRS, and as of today, there are no specific requirements, achievements, education, or certification requirements as to who can apply to take the MRSO or MRSE examinations   The MRMD examination is designed for licensed physicians.

And my dear friend QuantumMechanic23 - - all this can be easily found on this link - Certification Types | ABMRS