The "Certified Specialist of Wine" is the first of two tiers of wine certification offered by the Society of Wine Educators. It covers the entire world of wine, from growing, varietals, vinification, basic chemistry, faults and most all of the world's wine regions. There is no tasting/palate component. The initial investment (Study guide, Workbook, Test fee and membership ) is about $700. You have one year to take the test. The test is 100 multiple choice questions with 75% as passing. The pass rate for first tame takers is about 50%. It ain't an easy test.
It is equivalent to something between level 1 and level 2 of the CMS (Court of Master Sommeliers) certifications and a little above level 2 for the WSET (Wine & Spiritets Educational Trust) certifications.
There is a "Certified Wine Educator" above it, but that is a three year track with a bunch of blind palate requirements as well as blind fault recognitions and some essays. I'm probably not going to attempt it. The initial attempt pass rate is 12%.
The CSW/CWE are typically more industry oriented, than service oriented.