You can contact the Manpower Talent Management Branch (MPT) at SMB_talentmanagement@usmc.mil
Eligibility for lateral move and application procedures are provided in MARADMIN 636/23 at Enlisted Lateral Move information is available at Manpower Management Stay Marine page. Retention (MMEA-1)
Eligibility for TERA and application procedures are provided in MARADMIN 630/22 at https://www.marines.mil/News/Messages/Messages-Display/Article/3238131/marine-corps-temporary-early-retirement-authority-program/
All application paperwork can be found at the following URL. MMSR-2 is the POC for application questions. Separation and Retirement (MMSR)
Applications may be submitted no sooner than nine months and no later than six months prior to the date you wish the begin CIP. Reference MARADMIN 418/12. Separation and Retirement (MMSR)