The engineering and construction firm is occupying three levels in the tower.
Clough has expanded its office footprint in Perth’s QV1 building, relocating to three floors in the St Georges Terrace building.
The engineering and construction firm moved into the building earlier this year, initially occupying the ninth and tenth level.
The move was temporary, as it waited for a refurbishment of the fourth, fifth and sixth levels, where it moved to on Monday this week.
The company has been based in QV1 since April this year, when it moved from the Alluvion building on 58 Mounts Bay Road.
“Across the board we have built on our culture and made a strong commitment to creating a diverse and inclusive workplace which has certified our status as an employer of choice for the second period in a row,” he said.
“Creating this new, unique space reinforces this and is an exciting part of our journey.”