Ah, to clarify, that $1,800 is a rollover from a previous employer who did not offer matching.
Just heard from HR, who tells me that the employer matching contribution is "3% of your contribution plus additional 3% at the end of the year on your overall salary." I asked about caps/limits to the matching but she didn't mention any.
So here's a breakdown of what would be happening based off of a couple percentages.
Salary: $61,000
10% - $6,100 (my contribution), $183 (3% contribution matching) and $1,830 (overall salary matching)
12% - $7,320 (my contribution), $219.50 (3% contribution matching) and $1,830 (overall salary matching)
15% - $9,150 (my contribution), $274.50 (3% contribution matching) and $1,830 (overall salary matching)