What jobs can you get with a TS SCI?
The openings here include TDNA, DNEA, TAR, software, and AI engineering work. You need the clearance for these positions, but the experience requirement will determine which ones are worth discussing.
For example, if your SIGINT work involved researching targets and following communications over time, look at TDNA. If you spent those years drafting and editing intelligence reports, read the TAR requirements. A resume that explains those duties helps us much more than a specialty code on its own.
Education can also change which levels fit. Some TDNA and TAR levels accept a high school diploma or GED plus the listed years of relevant experience. The DNEA openings require a relevant degree. Those paths are on the individual role pages, including how much experience each level calls for.