He burgled a £3.5million mansion in Abridge
The former helicopter pilot had been on safe-cracking and locksmith courses and used social media sites like Facebook to compile a list of the 192 wealthiest people in the county.
On this list was Sullivan, the joint chairman of Premiership football club West Ham, whose Theydon Bois home was targeted last year.
Buisson, 49, also burgled a house owned by Lord Sugar in Chigwell on two consecutive nights while he was being investigated by police.
He stole watches and jewellery worth £184,000 after using a ladder to get in on June 5, last year.
He returned the next night and tried to drill open a safe but failed.
Basildon Crown Court heard that Buisson targeted isolated mansions at night and was sometimes aided by his nephew Benjamin Buisson, 29, who waited in a getaway car.
The raids were meticulously planned with the burglar appearing to know which room the owner’s safe was in – including those hidden under floorboards and carpets.
His movements around the properties were tracked by CCTV.
Buisson broke in with a burglary kit that included drills, lock picks, an infra-red night vision camera, two-way radios and balaclavas.
After going on the run in Spain, where his crime spree continued, he was caught by the National Crime Agency on the Costa del Sol.
After pleading guilty to 10 burglaries and two attempted burglaries, Buisson was sentenced on Friday.
West Ham chairman David Sullivan, with partner Emma Benton Hughes, was targeted by serial thief
He has not been not charged with the attempted burglary of Mr Sullivan’s home.
But last summer, West Ham Football Club released a statement offering a £25,000 reward for information leading to his arrest.
In 2013, Buisson was described as an “Essex entrepreneur” in a Namibian magazine feature about a wild game hunt he took part in.
He once ran an airgun shop in Loughton and had several other businesses, including an ice cream shop and teeth whitening business.
During the sentencing Judge Ian Graham said it was difficult to understand what led Buisson to the “orgy of burglaries”.
Some victims were at home when the raids took place, although Buisson never threatened violence.
The thief the two break-ins at the property owned by Lord Sugar
He also admitted a 2015 burglary at Smith’s Brasserie in Ongar, which is popular with the stars of TV reality show The Only Way Is Essex.
Kevin Toomey, prosecuting, said he disabled the alarm, found a key behind the bar for the room with the safe then spent 40 minutes opening it using specialist equipment.
He added: “Mr Buisson’s then girlfriend Miss Jones worked at the restaurant at the time and the owner suspected Mr Buisson.”
In December 2016, he began targeting residential properties.
Mr Toomey said: “Mr Buisson conducted internet searches via Facebook of the 192 richest people in Essex. Seven people on the searches were later burgled by him.”
The first home he chose was that of the Squibb family, who run a multimillion pound demolition firm.
He took £105,000 worth of jewellery from the house.
Three days later he targeted one of his Facebook friends’ next-door neighbours in Stapleford Abbotts and was seen carrying a safe which held £250,000 of items.
On February 2 last year, he burgled a £3.5million mansion in Abridge, taking £80,000 of jewellery and £3,500 in cash.
When police searched his home two months later, they found signal-jamming and anti-surveillance equipment plus a stolen drone.
Buisson went on the run after this, committing the two break-ins at the property owned by Lord Sugar.
It is believed he continued to target homes in Spain as phone records showed he was in contact with local locksmiths.
He also told relatives he did not need money sent to Spain as he had “so much gear here to sell”.
He returned to the UK under a European arrest warrant in May.
As well as being jailed for eight years, Buisson was placed under a serious crime prevention order to restrict his access to equipment that could be used to commit burglaries for five years following release.
At an earlier hearing, Benjamin Buisson, from Ongar, was jailed for two years after admitting eight counts of burglary, four of which were committed with his uncle.
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