Prepare quantity take-offs and verify quantities from drawings and site measurements.  Review BOQs, specifications, and contract documents.  Prepare and monitor project budgets and cost reports.  Evaluate subcontractor quantities and payment certificates. Prepare client monthly invoices/interim payment certificates accurately and on time. Follow up on invoice approvals and payment collections. Prepare subcontractor payment certificates and verify supporting documents. Monitor outstanding payments and contractual payment terms. Ensure all invoices comply with contract requirements and project progress. Review contract terms, conditions, and project obligations.  Assist in preparing contractual letters and official correspondences.  Handle variation orders, claims, EOTs, and contract amendments when required.