You would need to get your qualifications recognised and I think this is the organisation you'd need to contact for that:

"You are a teacher, special education teacher, speech therapist, psychomotor therapist and would like to work in Switzerland at an upper-secondary school within the general education sector.
Contact:
Swiss Conference of Cantonal Directors of Education (EDK)
General Secretariat, House of the Cantons
Speichergasse 6, Postfach 660, CH-3000 Bern 7
Tel. +41 (0)31 309 51 31
Web site: www.edk.ch"

http://www.sbfi.admin.ch/diploma/017...x.html?lang=en

I'm assuming the behaviour specialist part will come under special education, but if not check the PDF in the link to find another organisation which would be a better match. If nothing seems to fit, use the contact point link to get in touch with SERI direct to ask them.