Nathaniel Lambert commissioned as a Second Lieutenant in the US Marine Corps in 2015 through the Naval ROTC program at Washington State University. He then attended the Basic Officer Course and the subsequent course for his occupational specialty as a Ground Intelligence Officer: Infantry Officer Course, Scout Sniper Unit Leader’s Course and Ground Intelligence Officer’s Course.
Lieutenant Lambert then received orders to 1st Marine Division aboard Camp Pendleton. During his first year in the fleet in 2017, he served in the intelligence sections for both the Division and 5th Marine Regiment. He then received orders to 3rd Battalion, 5th Marines in early 2018 where he deployed as the scout sniper platoon commander as part of the 11th Marine Expeditionary Unit (MEU) from May - November of 2019. His platoon participated in multiple theater security cooperation events, training with partner nations in both the Middle East and the east Asia.
Upon returning from deployment, Captain Lambert transferred to 1st Battalion, 1st Marines where he served as the battalion’s intelligence officer. As the intel officer, he supported the Southwest Border Mission in the summer of 2020, where the battalion assisted Customs and Border Patrol, and another deployment with the 11th MEU from August 2021 – March of 2022.
Captain Lambert was then selected to be the Marine Officer Instructor at Marquette University Naval ROTC. He spent three years in that position, training future Marine and Navy officers. While at Marquette, he was promoted to his current rank, and he earned a master’s degree in political science. He then transferred to the Selected Marine Corps Reserve and assumed command of Charlie Company, 4th LAR in August, 2025 where he currently serves.