1st Marine Aircraft Wing
MACS-4 Logo

MACS-4 Leadership

Lieutenant Colonel Robert E. Williamson
Lieutenant Colonel Robert E. Williamson

LtCol Williamson was born and raised in Seminole, Florida. He graduated with his Bachelor’s degree from Morehead State University and earned his commission through the Platoon Leaders Course in 2002.

Read Biography

Maj James B. Holderbaum
Maj James B. Holderbaum

Major Holderbaum enlisted in the United States Marine Corps Reserve in July of 2004 and completed basic training at Marine Corps Recruit Depot, Parris Island in October of the same year...

Read Biography

Sergeant Major James K. Gray
Sergeant Major James K. Gray

SgtMaj Gray was born on 1 May 1979. He enlisted in the Marine Corps from Denver Colorado and attended Recruit Training at Marine Corps Recruit Depot San Diego, California in April of 1999.

Read Biography




1st Lt Philip Ramos
DSN: 315-636-6622

MACS-4 Deputy URC
SSgt Juan Antonio Magana
DSN: 315-636-5029/2692


MACS-4 Company L Iwakuni URC (Primary)

GySgt Vernon Richardson
DSN: 315-253-4535


MACS-4 Company L Iwakuni URC (Secondary)

GySgt Rodger Martin
DSN: 315-253-4535


MACS-4 Company M Kaneohe Bay URC

SSgt Nathan Shamrell
DSN: 808-457-4481








Report Suspicious Activity




Marine Air Control Squadron 4
Marine Air Control Group 18
UNIT 37215
FPO AP 96372-7215
Commercial: 011-81-611-736-3294
DSN: 315-636-3294

Wing Duty Officer
Cell Phone: 080-2737-9024
Office Phone: 645-2564


1st Marine Aircraft Wing