The University and College Union (UCU) said the memo showed a "callous and uncaring" attitude.
Tony Axon, of the lecturers' union UCU, said training had improved in recent years.
The Universities and Colleges Union (UCU) said the college's decision was "tragic" for the borough.
He added that the UCU candidate was in place in South Belfast and would remain so.
Some local UCU branches have denounced the deal and called for their leaders to resign.
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The University and College Union (UCU) said it was a "hammer blow to adult learning in the county".
Lesley Shelley is a paid member of the UCU but says her Jehovah's Witness faith prevents her from striking.
More spirit-sinking news came on December 2nd from the University and College Union (UCU), a trade group for lecturers.
David Limb of the UCU at the college said teaching would be affected.
The boycott which UCU members had been observing since March was beginning to have an impact on thousands of students.
BBC: NEWS | UK | Education | University pay ballot takes weeks
The University and College Union (UCU) said teaching staff would find out the details of the redundancies in the next week.
The University and College Union (UCU) said this was a particular concern.
The university staff union, the UCU, warned that the growth in student numbers needed to be matched by increased investment in higher education.
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Members of the University and College Union (UCU) and the National Union of Teachers (NUT) walked out of the college sites at 13:00 BST.
It accuses UCU of ignoring three years of negotiations - while the union blames the EPF for refusing talks through the conciliation service Acas.
Meanwhile, the UCU said the Higher Education Funding Council for Wales was expected to criticise senior management at the university in a forthcoming report.
And the University and College Union (UCU), representing lecturers, said the government should give less attention to employers' demands and more to citizens' skills needs.
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Sally Hunt, head of the UCU union, said there could soon come a point when her members would push for action at a national level.
The UCU said staff were angry about the latest cuts proposals.
"UCU activists and members who dared stand up to the culture of fear at the college have been completely vindicated by this report, " a statement from the union said.
The UCU said it feared hundreds of jobs could be cut, in addition to 57 lost earlier this year, and that campuses in Ashford and Dover could also be sold.
"We are willing to consider negotiating future changes in pension provision that provide affordable, secure and stable pension provision, " said Sally Hunt, general secretary of the University and College Union (UCU).
The UCU lecturers' union warned that graduate pay was not keeping pace with the forthcoming increase in tuition fees - and that the rewards of going to university would be diminished.
"We will examine the recommendations carefully and if there is a willingness by the governing body at the North West to genuinely address the issues raised they will not find UCU wanting, " he said.
But the University and College Union (UCU) said the launch of the new college - and state funding cuts for arts, humanities and social sciences - would result in the subjects becoming the preserve of a "select few".
The five unions involved were Members of University College Union (UCU), the National Union of Teachers (NUT), the Association of Teachers and Lecturers (ATL), the National Association of Head Teachers (NAHT) and the Public and Commercial Services Union (PCS).
Members of the University and College Union (UCU) and the National Union of Teachers (NUT) are planning to walk out of K College on the same day and protest at the Tonbridge campus, outside the governors meeting where the job cuts will also be discussed.
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