Raymond Christie has been appointed as an associate. He joins from Watkins Gray International and will be based in HLM's London office.
Matthew Thomas has been appointed as an architect. He joins from Holder Mathias and will be based in Cardiff.
Stephen Lennon has joined HLM as a design architect in Belfast. He was previously an associate at Atlantic Architects.
Claire McKerrow joins HLM's Scotland team as a Part II architectural assistant.