So Pollard worked for Israel as a citizen of the United States?
Yes he did. He didn’t have Israeli citizenship at that time because that would blow his cover. He wouldn’t have been a very good Mossad agent if he let the cat out of the bag .... :-) ...
AND ... you do know that ALL JEWS IN THE USA qualify for Israeli citizenship - no matter where they were born or no matter what their prior citizenship is.
After it got out and after Israel made the public statement that Jonathan Pollard was definitely working for the State of Israel and under their control - they then conferred Israeli citizenship upon him.