1740 London Custom House Officer

[howm0010]

Good afternoon,

I'm looking for some help/advice on where to look to find my 7th great grandfather's employment records. Upon his marriage in 1740 in St Mary White Chapel, Middlesex England  he is listed as a "Custom House Officer". I'm having a hard time locating any specific records regarding what a "Custom House Officer" is (or did in 1740s) or if there are any records such as pay, transfers, etc.
 Can someone please point me in the right direction?
His info:
Charles Howell born 1695 in Stafford, England. Shows up in 1740 in Middlesex England as "Custom House Officer" and then by 1755 as a "gentlemen"  still in St Mary White Chapel

Thank you
Meghan  howm00100@hotmail.com

[Elwyn Soutter]

Try National Archives:

http://www.nationalarchives.gov.uk/help-with-your-research/research-guides/customs-officers/