Guarantee companies are operated by individuals and by the state. Generally, small guarantee companies are run by individuals, but the requirements for running guarantee companies are relatively high. I remember that the minimum registered capital is 50 million yuan or 1 100 million yuan, which should still be quite strong.
Clerks should be drafting documents, making guarantee contracts, writing other materials or doing some chores. The salary is average, and it won't be much better. To go to a guarantee company, you still have to do business, deal with banks more and get in touch with the guarantee business more, so as to make more money.