Rav Landau A”h was a devoted Lubavitcher Chassid, and served as Rosh Yeshiva of Tomchei Tmimim HaMerkozis – Kfar Chabad, until the passing of his father, Rav Yaakov Landau A”h in 5746. He did not wear a Shtreimel or bekeshe, he wore a traditional Rabbonishe hat, the kind many other Lubavitcher Rabbonim wore, and a Kapote.
He became Rov of Bnei Brak after his father who had previously held the position passed away. Initially he declined to accept the role, and only did so after the Lubavitcher Rebbe pushed him to. He was opposed by many of the Roshei Yeshiva of Bnei Brak due to him being a Lubavitcher Chassid. Some wanted the position to go to Rav Shmuel Wosner A”h, however the latter insisted that Rav Landau become Rov.