This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Biostatistician (Clinical Trial Experience Required) based in United States. This is a senior-level biostatistics opportunity supporting clinical research programs from study design through reporting and submission activities. You will serve as a lead statistical partner across internal teams, clients, and clinical project stakeholders. The role combines hands-on statistical programming with study planning, analysis, documentation, and quality oversight. You will contribute to SAPs, IAPs, CDISC-compliant datasets, TLFs, randomization, and clinical study reports. The position also offers opportunities to mentor junior statisticians and contribute to departmental standards and processes. You will work within a GCP/ICH environment where statistical rigor, regulatory compliance, and high-quality delivery are essential. This role is well suited to an experienced biostatistician who enjoys clinical trial work, client collaboration, and end-to-end study ownership.