In 1972 Lachman graduated with BSc degree in civil engineering from Technion.

Lachman studied Architecture in Technion from 1973 till 1976, working as an architect in IDF Navy Construction department at the same time.

In 1978 - 1980 he studied sculpture with Chaim Gross in New York as well as attending Parsons School of Design, from which he graduated in 1980 with MFA.

[1] Lachman taught at the Avni Institute of Art and Design in Tel Aviv from 1985 till 1989.

He teaches painting and sculpture at the workclasses of Tel Aviv Museum of Art since 1987.