Construction scheduling / gannt chart creating

We are delivering a 150m² interior fit-out of a rooftop commercial extension in South London, a mixed-use space comprising a spa, events area, and treatment. Practical completion is targeted for 31 October 2026. We are looking for an experienced project planner or construction programme consultant to set up a working Gantt chart and advise on programme sequencing. The works are structured in two phases: an enabling works package (currently underway, covering fire systems, drainage, demolition, …