The firm, with studios in Belfast, also retained its 'Two Star' accreditation status for its 'outstanding' commitment to the issue.
It is one of four architecture practices to make the 2019 list.
Karen Mosley, HLM Managing Director, said: "This is a fantastic achievement for the whole practice and benchmarks us against all types of companies UK-wide, not just those in our sector.
-- Advertisement --
"In today's society it's common for individuals to have many competing demands in their lives and work-life balance is important. Our aim is to always do what we possibly can to promote wellbeing, engagement, personal growth and inclusivity. We work with a ‘one-team’ culture across our studios, have an Academy to help individuals progress and develop new skills, offer agile working befitting a modern workforce, and give support at every level."
HLM offers expertise across five disciplines including Architecture, Interior Design, Landscape Architecture, Environmental and Masterplanning.
(CM/JG)
