работать сразу в нескольких направлениях

[Chucha]

Please help me to put it into English.
Thanks to everybody for help :)
дизайн студия работала сразу в нескольких направлениях

[Abracadabra]

М.Б ....performed concurrent works for several areas

[Mo]

смотря что у Вас подразумевается под "направлениями":

The Design Studio was engaged with several clients at a time / was covering several areas at the same time / was involved in several projects simultaneously

[gogolesque]

i would use Mo's last version, but would say "simultaneous projects" instead of projects simultaneously - just sounds nicer that way :)