7120 vs 7820
Aerospace Experimental Psychologist (USN) vs Physician Assistant (USN)
Two rates that pass each other in the P-way daily and have zero comprehension of what the other one does for 12 hours.
What 7120 calls "another day at the office": you have a PhD and you study human performance in aviation and aerospace environments — cockpit design, pilot selection, human factors in high-G maneuvering, spatial disorientation, crew resource management, and the neurological limits of humans operating machines that fly faster than sound. What 7820 calls "another day at the office": the recruiter said 'you'll practice medicine in the most challenging environments on earth,' and they weren't exaggerating — you'll treat patients on aircraft carriers, in field medical facilities, at austere bases, and occasionally on a flight deck while the ship conducts flight operations. The word "office" is doing a lot of heavy lifting in one of these sentences. Two MOS codes that produce two wildly different elevator pitches at the veterans' networking event.
After the Uniform
The part the recruiter skips: what each job actually translates to once you're a civilian — and what it pays.
Salary data from the U.S. Bureau of Labor Statistics Occupational Employment and Wage Statistics program. A guide, not a guarantee.
Recruiter vs. Reality
The pitch versus what people who actually did the job report back.
“You'll work at the intersection of psychology and aviation — studying human factors, designing cockpit interfaces, and improving pilot performance. It's cutting-edge research with real operational impact, and the expertise is valued by NASA, FAA, and defense contractors.”
You are an Aerospace Experimental Psychologist in the Navy, which is one of the most niche designators in the entire Department of Defense and quite possibly the hardest to explain at a family dinner. You have a PhD and you study human performance in aviation and aerospace environments — cockpit design, pilot selection, human factors in high-G maneuvering, spatial disorientation, crew resource management, and the neurological limits of humans operating machines that fly faster than sound. The recruiter said 'you'll apply psychology to cutting-edge aerospace challenges,' which is one of the rare times a recruiter was entirely accurate. You literally research why pilots make errors and design the systems, procedures, and training that prevent them. You are the reason the ejection handle is where it is, the warning light is the color it is, and the heads-up display looks the way it does. Your work saves lives in ways nobody will ever publicly credit, and your conference presentations are attended by twelve people, all of whom have the same PhD.
“Navy PAs practice medicine with incredible autonomy — especially in operational settings where you might be the only provider. You'll gain clinical experience across multiple specialties, deploy with Marines, and serve aboard ships. The breadth of practice is unmatched in civilian PA life.”
You are a Navy Physician Assistant, which means you provide medical care to sailors and Marines in clinics, aboard ships, at remote duty stations, and in operational environments where you may be the highest-trained medical provider within a hundred miles. The recruiter said 'you'll practice medicine in the most challenging environments on earth,' and they weren't exaggerating — you'll treat patients on aircraft carriers, in field medical facilities, at austere bases, and occasionally on a flight deck while the ship conducts flight operations. Your scope of practice is broader than most civilian PAs dream of because when you're the only provider, everything becomes your specialty. You'll suture lacerations, manage chronic conditions, handle psychiatric emergencies, run sick call, and make the call on whether someone needs a medevac. The Navy invested heavily in your training and it shows — Navy PAs are among the most clinically versatile mid-level providers in any armed service.
The Real Life
Same dimensions, side by side. 7120 on the left, 7820 on the right.
Conducting human factors research in aviation and aerospace environments — cockpit design, pilot selection, spatial disorientation, G-tolerance, crew resource management, and human-machine interface design. You design experiments, analyze data, publish papers, brief program managers, and work with test pilots and engineers to improve aircraft systems based on human performance data. The work sits at the intersection of experimental psychology and aerospace engineering.
Providing primary and urgent care as a mid-level medical provider — diagnosing conditions, prescribing medications, performing procedures, managing chronic disease, and handling emergencies. On a ship: you may be the senior (or only) medical provider aboard, responsible for the health of the entire crew. With Marines: you serve as the battalion or regimental medical officer. In clinics: high-volume primary care with a broad scope of practice that exceeds most civilian PA roles.
Requires a PhD in experimental psychology, engineering psychology, or human factors before commissioning. No military psychology training pipeline — you enter as a fully qualified researcher. Officer Development School (ODS) at Newport, RI is 5 weeks of basic military orientation. The community is very small — fewer than 50 billets Navy-wide.
Requires a Master's degree from an accredited PA program and NCCPA certification. Most Navy PAs enter through the Interservice Physician Assistant Program (IPAP) — a 29-month Army-run program that produces military PAs — or through direct accession from civilian PA programs. ODS at Newport, RI is 5 weeks. Additional military medical training includes operational medicine and field medical courses.
Low. Research and academic work is office and laboratory-based. Standard Navy PT requirements.
Moderate. Operational PA billets with Marines or on ships involve the same physical environment as the units you support. Clinical work is standard medical practice.
Aerospace Experimental Psychologist is one of the most specialized and least-known designators in the Navy. You need a PhD before you start, the community has fewer than 50 billets, and most people in the Navy have never heard of you. The recruiter certainly didn't mention this option — you probably found it yourself through academic channels. The work is genuinely fascinating: you study why pilots make errors, how cockpits should be designed, and what the limits of human performance are in extreme aviation environments. Your research directly influences aircraft design, pilot training, and safety procedures. What they won't tell you: the community is so small that career management feels personal (for better and worse), your promotion path is slower than URL officers, and you will spend a significant portion of your career justifying your existence to operational commanders who don't understand what experimental psychology contributes to aviation. The civilian transition is seamless — FAA, NASA, defense industry human factors roles, and academic positions all value this exact background.
Navy Physician Assistant is one of the most clinically rewarding mid-level provider roles in medicine, period. The scope of practice in military settings — especially on ships and with Marine units — far exceeds what most civilian PAs experience. On a ship, you may be the only medical provider for hundreds of sailors, which means everything from routine sick call to surgical emergencies is your responsibility. The recruiter will emphasize the clinical autonomy and operational medicine experiences, and those are real. What they won't tell you: the responsibility of being the sole provider can be isolating, the medical supply chain on a ship is limited, and the administrative burden of military medicine consumes time you'd rather spend on patient care. The civilian transition is excellent — you're a certified PA with the broadest clinical experience available, and civilian emergency departments, urgent care centers, and primary care practices value the independence and decision-making skills military PAs develop.
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