As a Principal Landscape Architect, your main responsibilities include leading project vision and design development, overseeing project teams, and ensuring design solutions meet client objectives, regulatory requirements, and sustainability goals. You'll often manage client relationships, coordinate with architects, engineers, and contractors, and oversee budgets and timelines from concept to completion. Additionally, you may be involved in mentoring junior staff, developing proposals, and representing the firm at public or stakeholder meetings. This leadership role requires balancing high-level creative input with practical project management and team collaboration skills.