The assessment & testing center at this University is a nationally-registered testing center. We administer tests such as the ACT, SAT, GRE, GMAT, LSAT, MCAT, TOEFL, TOEIC, the FAA exam, and we are the only testing center in the state that administers the licensing exam for teachers. I know I'm missing some, but those are the majority of them.
On the assessment side, we also evaluate the extent to which the general education goals of the university are being met. GenEd assessment is fun - writing samples are collected from students as part of the normal classroom process, and those samples are evaluated using scoring rubrics corresponding to whichever GenEd goal we're assessing in a given year. The data collection and scoring is done through various academic committees, and our office handles the data analysis and writing the annual report. We also write the annual assessment report to the Regents for Higher Education.
One of the advantages to working in this office is that it's not part of any given department or school - we report directly to the Provost. It reduces the politicking, but doesn't completely eliminate it. OTOH, it's what's known as alt-ac (alternative academic); we're staff, not faculty, and that can cause some tension when asking faculty to file annual reports they really have no interest in writing, for example.
From doing some investigating, I know other universities house psychometric testing within the Assessment & Testing offices (for example, there's currently a position for a Psychometrician for a university assessment & testing center listed on one of the higher ed job sites); some universities also add accreditation as part of the responsibilities of the office, and that's its own barrel of fun.....
I'm with Erg on posting exact numbers; that said, I landed the statistical analyst position here with the ink not dry on my Master's degree and started in the mid-five figures. The Assistant Director position runs in the upper-mid fives, and I've seen Director positions listed paying in the low six figures.