Lachman holds a Graduate Certificate in Education and Bachelor of Science degree with major in Mathematics. He taught mathematics in secondary schools at the senior level for 15 years and for the last 19 years has been a Microsoft application trainer with a number of IT training companies in Wellington. He has been teaching all the Microsoft application courses in the Adult Education programme at Onslow College, and now Wellington High, for over 10 years.
Currently, he is the manager and senior trainer at softTRAIN Ltd, an IT training company.
His other interests are travelling, photography and chess.