As group leader, Mr. Barata’s responsibilities included: project/program team compliance with contract terms; monitor subcontractors' progress, performance and compliance with contractual commitments; participate as necessary in contract dispute resolution and litigation concerning project/program performance, administration and other liability issues; review and approve sub-consultant and vendor invoices, and resolve payment disputes; monitor schedules, billing and reports; ensure appropriate charging of man-hours, costs and expenses to projects/programs; assist as necessary in obtaining payment from clients; resolve client disputes and adjusts billing records as required.