In a statement Deloitte said VSG directly employs 208 people in Manchester but through its supplier relationships it contracts about 2,000 more, mainly in the rail sector.
It is the largest supplier of labour for Network Rail.
Dan Smith, joint administrator and partner in Deloitte’s Reorganisation Services practice, said: “The group has suffered recently from cash flow pressures.
“The sale of the trade and assets of these companies minimises disruption in the continued delivery of these essential services to the rail industry and secures jobs.”
The deal involves Vital Services Group Limited, Vital Rail Limited, Ematics Limited, Vital Resources Limited, Quality Recruitment Limited, Vital Consulting UK Limited and Vital Power (UK) Limited.
Three other companies in the group – Vital Skills Training Limited, Sicura Systems Limited and Vital Technology Limited – are not affected.
(Edited by Andrew Trotman)