He was appointed Director of the zoological department of the Vienna Museum in 1962, and retired in 1968.[2]
A list of Beier's 398 scientific papers was published, with an obituary, in Annalen des Naturhistorischen Museums in Wien.[3] 252 were on pseudoscorpions.[2] He described and named over 1200 pseudoscorpion species of which 1180 were still valid in 2007.[4]
He was editor of the Orthopterorum Catalogus and an updated edition of the volume on insects in the Handbuch der Zoologie.[2]