Jennifer Heath is a businesswoman.
She doesn't actually work for the CIA; she is the co-owner of a successful antique shop in New York. A member of an upper-class family, daughter of a famous author of popular cookbooks, Heath has had a love of antiques all her life and has her own personal collection of unique items she is quite proud of and which are quite valuable. She has been in the antique business since she had graduated from Syracuse several years before.
Heath is in her late 20's with light brown hair and green eyes. She is 5'6", in excellent physical shape kept that way through a training regimen that includes karate. She jokes with a friend in one scene that she has always been a tomboy and that growing up in her family meant standing up for herself. She quips about her rough-and-tumble upbringing by admitting, "I was some tough little cookie back then. Dished out many a bloody nose." Her activities in the recorded adventures will prove that out several times.
Her frequent buying trips overseas on behalf of her and her partner, looking for bargains and items that would turn a profit, would provide excellent cover and thus makes her a perfect candidate to be approached by the Agency, though at the start of the two-book series that has not yet happened. Her independent streak and an as-yet untapped love of adventure makes her unlikely to say no for long.
Another fact about Heath that is noteworthy is that she was not in the least looking for a love interest to complicate her life. She would find one nevertheless.