The incumbent appears as counsel in contract negotiations and administrative hearings and proceedings; reviews and prepares contracts, grants, leases, and other legal documents; develops legal theories, tactics, and procedures; prepares for and assists in the trial of matters litigated and appealed in federal courts; provides technical and policy guidance in the solution of complex legal issues; performs exhaustive research; provides legal advice, opinions, decisions and new and novel legal procedures, instruments, and documents required to facilitate and provide the most effective operation, administration, and enforcement of various Departmental programs and activities. The incumbent furnishes specialized legal expertise in a vast and varied array of legal fields including (1) administrative law and procedures; (2) legislative law and procedures; (3) constitutional law and procedures; (4) laws affecting Indians; (5) international law and procedures; (6) court rules and procedures; (7) contract and procurement laws; (8) real and personal property laws; (9) and specific and related laws, rules and regulations pertaining to the various Departmental bureaus, offices, programs, functions and activities.