Keeps a fleet, a crew roster and a schedule all working at once.

Airlines are enormous optimisation problems that break every time the weather does. Operations analysts model, forecast and recover the network, a quantitative career in aviation that involves no engineering degree.
Maths, economics or data science; aviation knowledge is learned on the job.
Operations research analysts · US Bureau of Labor Statistics, Occupational Outlook Handbook, May 2024 wages and 2024–34 projections.
Your recommendation will sometimes be ignored for reasons that are not analytical, and sometimes those reasons are good. Being right and being persuasive are separate skills and the job needs both.