Phrogflyer 70
Your age vs hours is probably reasonable for Cathay SO selection. I was recruited out of a ground job, so I wouldn't be too concerned about that aspect. Maybe consider doing some part time flying during your ground job to show them you're still keen. (It'll be the last flying you do for a while if you get the job!!!)
Bottom line....if the industry ramps up again like it did in the past few years before the GFC, you shouldn't have a problem getting an interview with your background.
Good luck, ('Semper Fi' and all that good marine stuff),
lmh