Born in Hammersmith, Cadette began his career in non-league football with Isthmian League Division One side Wembley, before securing a move to the Football League with Division Three club Orient in August 1984. He made 28 appearances and scored five goals in a disastrous 1984–85 season for the Os, which saw the club relegated to Division Four. He departed Brisbane Road after the season.
Cadette signed for Division Four side Southend United in a £4,000 deal in August 1985. He had an emphatic start to his career at Roots Hall, scoring four goals in a 5–1 rout of former club Orient on his full league debut for the club. He scored 56 goals in 104 appearances over the course of two seasons and celebrated promotion to Division Three with a third-place finish at the end of the 1986–87 season. Cadette was also twice named in the Division Four Team of the Season while with the Shrimpers. He left the club after the season.
Cadette moved up to Division Two to sign for Sheffield United in July 1987, in a move which was settled by tribunal for £90,000. He failed to replicate his previous goalscoring form, netting just seven times in 33 appearances, before departing at the end of the 1987–88 season.
Cadette moved back to London to sign for Division Three side Brentford in July 1988 for an £80,000 fee. Brought in by manager Steve Perryman to form a strike partnership with Gary Blissett, Cadette hit the ground running, top scoring with 17 goals in the 1988–89 season, before having his season cut short by injury in March 1989. He featured in Brentford's run to the quarter-finals of the FA Cup, which ended in a 4–0 defeat to giants Liverpool, with Cadette hitting the post with a chance which could have put the Bees 1–0 up. The arrival of Dean Holdsworth up front for the 1989–90 season and the change to route one tactics pushed Cadette out of contention. He rejected a move to a Dutch Eerste Divisie club in the 1990 off-season and stayed at Griffin Park on a weekly contract. He scored seven goals from 39 appearances in the 1990–91 season, which was ended after he underwent knee surgery in April 1991. Cadette was offered a new contract in the 1991 off-season, but again turned it down to remain on a weekly arrangement. He began the 1991–92 season up front alongside Holdsworth, but fell behind Blissett in the pecking order in October 1991 and departed Griffin Park in January 1992. Cadette made 123 appearances and scored 31 goals in three-and-a-half years with Brentford. Looking back in 2005, Cadette revealed that despite his differences with manager Phil Holder (who had been promoted from Steve Perryman's assistant in 1990), he appreciated the support he received from the fans.
Out of favour at Brentford, Cadette joined Division Two strugglers Bournemouth on loan in March 1990, until the end of the 1989–90 season. He scored one goal in 8 appearances.
Cadette joined Scottish League Premier Division side Falkirk for a £50,000 fee in January 1992, linking up with former Brentford teammates Tony Parks and Eddie May. He had a successful two-and-a-half years with the club, winning the 1993–94 Scottish Challenge Cup (scoring in the final after being famously attacked by manager Jim Jefferies at half time) and the First Division title, which secured an immediate return to the top-flight. He departed the Falkirk Stadium in October 1994, after a spell which Jim Jefferies described as "phenomenal".
Cadette returned to England to sign for Division One side Millwall on loan in October 1994. He signed a permanent £130,000 deal the following month. In what turned out to be a disastrous move, Cadette made just 27 appearances and scored 6 goals in almost three years at The New Den.
After a trial with Clydebank, Cadette signed for League of Ireland side Shelbourne on a short-term contract in August 1997, as cover for the injured Stephen Geoghegan and Pat Morley.
Cadette rejoined Scottish League Second Division side Clydebank in late August 1997, scoring one goal in seven appearances before departing the following month.
Cadette dropped into non-league football to join Southern League Premier Division side Gloucester City during the 1997–98 season, making just three appearances.
After retiring as a player, Cadette became involved with the youth setup at former club Millwall. He later managed Isthmian League Division One side Tooting & Mitcham between November 2002 and May 2006. He was sacked at the end of the 2005–06 season, after defeat to Tonbridge Angels in the playoff semi-finals.