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Donald Tatem

@donaldtatem

Government contract billing specialist at TriOmni Resources, LLC, handling federal invoicing, contract closeouts, and AI accounting evaluations.

United States
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At TriOmni Resources, LLC, I work on special projects involving government contracts, billing backlogs, closeouts, and data migrations. I also support AI engagements by designing accounting scenarios and evaluating how AI agents complete real-world workflows.

At Arcfield, I supported an enterprise CLM migration by validating and analyzing contract data, preparing reports, and helping maintain data integrity and compliance.

At Technica, LLC, I managed contract setup in Deltek Costpoint and submitted invoices through WAWF and customer billing systems. I maintained billing schedules, resolved receivables and billing discrepancies, and assisted with financial close activities.

Across roles with LinQuest Corporation, Johnson Controls Federal Systems, CyberCore Technology, and other organizations, I handled government contract billing, electronic invoicing, receivables, and closeouts. My work has included contracts spanning FFP, T&M, CPFF, CPAF, and CPIF, as well as FAR/DFARS compliance and Deltek Costpoint.

Experience

Work history, roles, and key accomplishments

LC

Contract Closeout Specialist

LinQuest Corporation

Jan 2021 - Feb 2023 (2 years 1 month)

Coordinated contract closeout activities for government contracts, prepared and submitted final invoices, and resolved documentation issues with contracting officers and subcontractors.

JS

Senior Billing Specialist

Johnson Controls Federal Systems

Nov 2019 - Dec 2020 (1 year 1 month)

Administered contract setup and modifications in Deltek Costpoint, processed electronic invoices via WAWF, and resolved billing discrepancies. Supported month-end and year-end close processes.

MC

Billing Specialist

Millennium Engineering and Integration Company

Mar 2016 - Sep 2017 (1 year 6 months)

Prepared and submitted invoices for various federal contract types, set up projects in Deltek Costpoint, and resolved invoicing discrepancies. Assisted in reducing aged receivables and improving billing efficiency.

Education

Degrees, certifications, and relevant coursework

Norfolk State University logoNU

Norfolk State University

Bachelor of Science, Management

Bachelor of Science in Management from Norfolk State University.

Northern Virginia Community College logoNC

Northern Virginia Community College

Certificate, Construction Management Supervision

Certificate in Construction Management Supervision.

Northern Virginia Community College logoNC

Northern Virginia Community College

Certificate, Federal Acquisition Contracts Management

Certificate in Federal Acquisition Contracts Management.

Howard University School of Divinity logoHD

Howard University School of Divinity

Master of Divinity, Divinity

Master of Divinity from Howard University School of Divinity.

Tech stack

Software and tools used professionally

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