Develops/validates subcontract specifications, work statements, Subcontract Management Plans and Terms and Conditions for the procurement of specialized materials, equipment, supplies and services of a highly specialized nature which may require alterations and lead activities of subcontract administration teams on assigned programs required for the sourcing of complex (i.e., engineering development) programs for material, software, and services. Must have individual contributor capabilities to prepare/review proposals, develop evaluation criteria, negotiate subcontract provisions, select or recommend subcontractors, write subcontract packages for review, prepare awards and administer resulting subcontracts and negotiate additions, deletions, or modifications to subcontracts and resolve invoice issues.