Joseph is also a photographer, and has campaigned to expose Soviet nuclear testing in Kazakhstan.
Unitl 1999, she worked as a "jobbing actress", making appearances in Hercules: the Legendary Journeys, Sale of the Century and Hey Hey It's Saturday. To "get away from that soap-star/TV presenter image and do some proper acting Joseph moved to the United States to study acting with the Atlantic Theater Company in New York. She then moved to Los Angeles where she spent 18 months living off her savings trying to get auditions. In those 18 months her only jobs were a single commericial and a job interviewing LA-based film actors for Australian television. In 2001 her lawyer informed her that she would have to travel to Sydney to be interviewed for her green card. On the day she was due to fly back to Australia, her agent informed her of an audition for Cold Feet, a British television series whose producer was looking for an Australian actress to become a new main cast member. Two weeks later she had moved to Manchester and was doing read-throughs with the rest of the cast. Her character, Jo Ellison, appeared in all episodes of the fourth and fifth series. Two days after filming the final episode in 2002, Joseph left Britain and returned to Australia, where she was an invited guest at the Melbourne Spring Racing Carnival.
In 2004, she appeared on Australian television for the first time since a regular role in Tales of the South Seas in 1999, playing Dr. Grace Connelly for six episodes on All Saints. The day after she completed filming of her scenes, she returned to Los Angeles for the pilot season. She got a small part as a flight attendant in the pilot episode of Lost. Joseph's scenes, on an airplane set, were filmed over two and a half days in Los Angeles. An early script draft of the pilot called for her character to be seen dead on a beach, though subsequent rewrites removed the scene. A producer liked Joseph and her character, and planned to bring both back to the series at a later date. She returned at the beginning of the second season, when it was revealed that her character, given the name Cindy Chandler, had survived the plane crash in the pilot episode along with other passengers from the tail section of the plane. Despite being asked not to change her appearance too much after the pilot, Joseph had her haircut, so in her first few episodes of the second season, she had to "go through the whole debacle of putting a Rambo scarf around [her] head, which just looked ridiculous." Her episodes for season 2 were filmed over five weeks and were broadcast in 2005. Her character abruptly vanished in the middle of an episode. Joseph reprised the role for two episodes in the third season, in which the whereabouts of her character are revealed.
|1992||Paradise Beach||Cassie Barsby||Main cast member|
|Home and Away||Joanne Brennan||Recurring role (1995–1996)|
|1997||Hercules: The Legendary Journeys||Nemesis||2 episodes ("Two Men and a Baby"  and "Full Circle" )|
|1998||Tales of the South Seas||Clare Devon||Recurring role (1998–1999)|
|1999||Water Rats||Mary Worth||1 episode ("Dangerous Encounters")|
|2001||Cold Feet||Jo Ellison||Main cast member (2001–2003)|
|2004||Go Big||Sophie Duvet|
|All Saints||Dr. Grace Connelly||Recurring role (6 episodes)|
|Lost||Cindy Chandler||Recurring role (2004–2007)|
|2009||Angels & Demons||Australian Reporter|