North Brisbane Based, Plant Hire, & Diesel Mechanical Services. PSQ is a locally owned and operated business within the Brisbane North area. When you choose PSQ, you have peace of mind as our plant is 100% compliant and is maintained to the highest of standards, by industry professionals with a passion for the industry and pride in their work. We are committed to delivering outstanding results to our clients - from cost-effective plant hire or diesel mechanical solutions to OHS compliance outcomes.