Employer requirements

I’m not sure if this is the right forum to ask this question. What are employers looking for when  it comes to COBOL. Is proficiency in COBOL the only requisite they want, or are they looking for other things as well? At the age of 70, and with issues like memory retention and learning new things, learning COBOL is one thing. Learning more than just a programming language may be more than I can muster.