Built on Service. Focused on Safety.
Aeterna Training Academy provides professional, safety-focused firearm instruction designed to build confidence, sound judgment, and skills that last a lifetime.
Training That Never Ends. Skills That Last a Lifetime.
We believe firearm ownership carries real responsibility. Our mission is to give every student — whatever their starting point — the safety habits, technical skill, and sound judgment to carry a firearm responsibly for the rest of their life. Courses are tailored for new owners, developing shooters, families, and students seeking practical personal-protection knowledge.
Alejandro Duenas
Founder & Lead Instructor
Alejandro Duenas is a United States Army veteran who served three years of active duty with the 7th Infantry Division, 1st Battalion, 9th Infantry Regiment (1/9 Infantry), followed by nine additional years of service in the Army National Guard. That service instilled a discipline and respect for firearms that now forms the foundation of every course taught at Aeterna Training Academy.
After transitioning from military service, Alejandro pursued NRA certification to bring that same level of professionalism and safety discipline to civilian instruction. Today, he teaches new owners, families, and experienced shooters alike — meeting every student exactly where they are and building them up from there.
Certifications & Credentials
- NRA Certified Pistol Instructor — Fundamentals of safe, accurate pistol handling and marksmanship instruction.
- NRA Personal Protection In the Home (PPITH) — Certified to instruct home-defense readiness and decision-making.
- NRA Personal Protection Outside the Home (PPOTH) — Certified to instruct concealed carry and away-from-home personal protection.
- NRA Range Safety Officer (RSO) — Certified to manage and enforce range safety procedures.
Military Service
- US Army, Active Duty — 3 years, 7th Infantry Division, 1st Battalion, 9th Infantry Regiment
- Army National Guard — 9 years of service
What Sets Our Training Apart
Military-Grade Discipline
Real-world training standards drawn from over a decade of active duty and National Guard service.
Patient, Student-First Teaching
No judgment, no rushing. Every student progresses at a pace that builds real, lasting confidence.
Practical, Not Theoretical
Every course is built around skills you will actually use — not just what it takes to pass a class.