Okay...
Here's yer info...
US Customs Service require a minumum of 1,500 total time, PIC multi and 500 multi, 150 IMC and Night.
You are covered under the Federal Law Enforcement Retirement System so you are required to retire by age 57. You cannot be over the age of 37 when applying, they only have 320 to 350 pilots at present and turn over is low to non existant.
Contact the Office of Personel Managment (OPM), ask for a Qualifications Standard Handbook for General Schedule Positions. Get a standard Federal application form, through OPM.
Next contact the USCS directly and ask them to send you a vacancy announcement, (see if they still have the mailing list for these and if so asked to be placed on it). The announcement will include all the info you need to fill out the job app you got from OPM.
Some agencies will accept resumes with completed apps but others don't and if you send one it will booger up things really good, so check first!
You will have to apply directly to the agency itself and if you are selected to be pooled, your app is good for only 90 days after which you will have to submit ALL the stuff over again.
Its a real pain in the arse, but it could pay off in the end.
Keep in mind, I am quoting from personal experience from way back in 1995, stuff probally has changed alot so don't quote me on anything!
