Hire Rajinder Singh Siyan, a pharma consultant specializing in Drug Development. See services offered, experience summary, and connect via apicule.
Based in: India
Willing to work in: Global
Consultant Type: Independent Consultant
Expertise summary: Rajinder Singh Siyan is a senior API process development consultant with 20+ years of experience in generic API development for small-molecule drug substances. His expertise includes synthetic route design, process planning, scale-up, process optimization, technology transfer, and development of practical, cost-effective manufacturing pathways. He also brings strong experience in impurity control, alternate route evaluation, and building robust processes aligned with quality, safety, and regulatory expectations.
Rajinder supports API process development across the full development cycle, from early project planning and synthetic route selection to process optimization, scale-up, and transfer toward commercial readiness. His experience includes designing practical and cost-effective multi-step synthesis pathways, evaluating alternate routes, improving yields and efficiency, and developing scalable processes for small-molecule APIs. He also works on impurity control strategies, including process-related impurities and PGIs, while applying strong scientific and regulatory understanding to build robust, safe, and manufacturing-friendly processes. His approach combines technical depth with problem-solving, helping teams improve process performance, reduce development risks, and create commercially viable API manufacturing routes.
