Defence and security technical services firm Cohort has won new contracts worth more than £60m in the UK defence sector.Its specialist systems division MASS has won a contract worth more than £50m to continue work that has been undertaken with the Ministry of Defence (MoD)since 2000, including IT infrastructure management and management of a secure MoD.Defence consultancy SCS has won a £2.2m contract to provide specialist support to the Permanent Joint Headquarters as it commands UK forces on overseas operations.Its surveillance systems and software house SEA has won a contract involving the Astute submarine programme worth more than £10m.