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 was England's leading player throughout much of the 1990s and the first few years of the 21st century. 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.^[2]

Born in North Walsham, Norfolk, she won five British under-23 titles, and five senior British national titles.^[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. ^{[citation needed]}

She lost the 1996 World Open final to Sarah Fitz-Gerald 9–4, 9–2, 4–9, 9–6 who would go on to win another four World Opens. At the 1998 Commonwealth Games she won a gold medal in the doubles with Sue Wright, and a bronze in the singles.

In 1999 she won the World Open title.^[4]

• List of WISPA number 1 ranked players
• Official Women's Squash World Ranking

• Cassie Jackman at Squash Info