Dawnn McCullough serves as Vice President of Mission Support at Knexus, where she provides executive leadership for operational execution, contract performance, and strategic growth across the company’s DoD portfolio. She oversees workforce strategy, compliance, financial performance, and customer engagement in both classified and unclassified environments, ensuring disciplined delivery and sustained mission alignment.
With more than 20 years of experience supporting DoD missions, including prior service in the U.S. Army, Dawnn specializes in translating complex operational and logistics requirements into executable programs and scalable delivery models. Her expertise spans portfolio management, contract execution, proposal strategy, workforce operations, and risk governance. She is known for strengthening operational discipline, mitigating risk, and aligning delivery with evolving government priorities.
Prior to Knexus, Dawnn served as Director of Operations and Proposal Management at S4 LLC, leading multi-site DoD contract execution and directing full-lifecycle proposal efforts that contributed to the award of numerous competitive contracts. Her experience includes extensive support to U.S. Army and U.S. Air Force organizations, with emphasis on logistics data integration, enterprise systems, sustainment operations, and mission support services.
Dawnn holds an Associate of Applied Science in Information Technology with a concentration in Project Management and is a certified Project Management Professional (PMP).