Cassandra "Cassie" Jackman MBE (born 22 December 1972 and competing in some years as Cassie Campion) is an English former squash player who won the World Open in 1999.

She retired due to a recurring back injury in December 2004.

[1] Jackman was appointed Member of the Order of the British Empire (MBE) in the 2004 Birthday Honours for services to squash.

[3] She represented England at four World Team Championships in 1992 in Vancouver, 1994 in Saint Peter Port, Guernsey, 1996 in Malaysia and 2004 in Amsterdam.

At the 1998 Commonwealth Games she won a gold medal in the doubles with Sue Wright, and a bronze in the singles.