Harry Fletcher of probation officers' union Napo said the "astonishing" overhaul was being "rushed through without proper thought to the consequences".
Ecuador exports a heavy sour crude called Napo and a medium-heavy, medium-sour crude called Oriente that is produced in the northeast of the country.
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The National Association of Probation Officers (Napo) has also voiced its concerns, saying up to 750 jobs could be put at risk in Wales.
Harry Fletcher, assistant general secretary of probation service union Napo, said the report confirmed that Noms had been "a major problem from the start".
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Napo head Harry Fletcher is also concerned the reorganisation could see an huge increase in red-tape as a new level of regional bureaucracy is created.
"I've certainly been worried for 15-18 months that individuals are being transferred into open jails who pose a risk to the public" said Napo's Harry Fletcher.
Ferrara, a charming 46-year-old with a Sicilian accent who is known as Napo ("NAP-oh") to friends, is a medical detective with an unerring knack for knowing what to pursue.
Had NAPO done some basic gumshoe work, it might have pressured Obama, in exchange for its coveted endorsement, to disclaim his support from Ratner and other defenders of terrorism.
But probation officers' union Napo called for the two firms to be "disallowed" from delivering services until the audit was complete, and criticised the government's "rush to privatise the probation service".
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"The probation service pioneered equal opportunities and it is still well ahead of other agencies, but Napo is deeply concerned about the number of black staff failing their probationary year, " spokesman Harry Fletcher said.
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