Ability to work in a fast-paced, team environment and meet monthly finance and company reporting deadlines required. Ability to use sound judgment, due care, and act autonomously in performing the duties of billing and collections. Must possess a tenacious attitude around the work of A/R Collections in handling clients with due care and professionalism, and ensuring payments are received according to terms.  Generates project invoice transactions and oversees assigned Accounts Receivable (A/R) Collections, ensuring the integrity and accuracy of A/R transactions. Enter invoices to supplier portals such as Ariba, Tungsten, Taulia. You interacts closely with the company’s Proposals & Contracts and Project Management teams, and has high visibility across the organization, driving company operations for billing and collections.  Independently lead the Collections function to ensure prompt and orderly collection of billed transactions; regularly engage within the Company (Finance, Project Managers, Business Development, etc.) and with external customers to elevate A/R Collections to an optimal level. Tactfully & extensively communicate (phone and email) to critical and sizeable clients seeking payment on funds owed for work completed. Prepare and issue monthly invoices for all billable projects and costs, including hourly, unit, and pass-through; guarantee timely and accurate tracking of customer contracts, change orders, and service invoices; meet departmental billing deadlines.