Attorney Dylan Thayer to Argue Military Promotion Case Before the D.C. Circuit: Mitchell v. Phelan
The Law Offices of David P. Sheldon, PLLC, announced that Attorney Dylan Thayer will present oral argument before the U.S. Court of Appeals for the District of Columbia Circuit on Friday, November 21, 2025, in the case Ernest F. Mitchell v. John Phelan, Secretary of the Navy (Case No. 25-5013).
At issue in this appeal is whether the Navy violated federal law when it delayed a service member’s promotion beyond the statutory 18-month limit set by 10 U.S.C. § 624(d)(5)—and whether that delay automatically entitled Lieutenant Mitchell to promotion “by operation of law.” The case also challenges the Navy’s decision to issue a “detachment for cause”, alleging it was based on arbitrary findings inconsistent with military regulations and fairness standards.
Mitchell, a decorated officer with over a decade of service, was selected and Senate-confirmed for promotion to Lieutenant Commander before the Navy delayed his advancement following a minor disciplinary action. Despite a Board of Inquiry’s recommendation that he remain in service, his promotion was later withdrawn—prompting a challenge before the Board for Correction of Naval Records (BCNR), the U.S. District Court for the District of Columbia, and now the D.C. Circuit Court of Appeals.
Attorney Thayer, who will argue on behalf of LT Mitchell, emphasized the broader implications of the appeal:
“This case isn’t only about one officer’s career,” Thayer said. “It’s about ensuring that the military follows its own laws and deadlines and that service members are not punished twice for the same incident. Congress set an 18-month limit on promotion delays for a reason: to guarantee accountability and prevent arbitrary career destruction.” “It’s also about the plain meaning of the statute.”
The appellant’s brief argues that once the Navy exceeded the statutory delay period, Mitchell was automatically promoted by operation of law, and that the Board for Correction of Naval Records acted arbitrarily and capriciously when it failed to correct this injustice.
The appeal also challenges the Navy’s expansive interpretation of “substandard performance” under MILPERSMAN 1611-020, arguing that no definition of “gross negligence” or “complete disregard of duty” fits the record of an officer consistently rated “Promotable” or “Above Standards” in multiple fitness reports.
Oral argument is scheduled for 9:30 A.M. on November 21, 2025, before a three-judge panel at the E. Barrett Prettyman U.S. Courthouse in Washington, D.C. The outcome could set an important precedent on promotion timelines, executive appointment authority, and due process protections for officers across the armed services.
About the Law Offices of David P. Sheldon, PLLC
The Law Offices of David P. Sheldon, PLLC, based in Washington, D.C., represents military service members, veterans, and federal employees worldwide in courts-martial, boards of inquiry, BCNR and BCMR appeals, and federal court litigation. The firm is nationally recognized for its advocacy in military justice, administrative appeals, and constitutional due process.
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