An AWS Solutions Architect is a professional responsible for designing and implementing cloud-based solutions using Amazon Web Services (AWS). They assess business needs, determine the most appropriate AWS services, and create scalable, secure, and cost-efficient architectures. Their role involves working with teams to optimize cloud systems, ensuring high availability, and maintaining performance. They must have expertise in cloud computing, networking, security, and best practices for building on AWS. Typically, AWS Solutions Architects hold certifications and are integral in guiding organizations through their cloud adoption journey.