Members of the U.S. military service maintain the U.S. national defense. Although some service members work in occupations specific to the military, such as fighter pilots or infantrymen, many work in occupations that also exist in the civilian workplace, such as nurses, doctors, and lawyers. Members serve in the Army , Navy , Air Force , Space Force , Marine Corps , or Coast Guard , or in the Reserve components of these branches, and in the Air National Guard and Army National Guard . (The Coast Guard, which is included in this profile, is part of the Department of Homeland Security.)
The military distinguishes between enlisted and officer careers. Enlisted personnel make up about 82 percent of the Armed Forces and carry out military operations. The remaining 18 percent are officers—military leaders who manage operations and enlisted personnel. About 8 percent of officers are warrant officers, who are technical and tactical experts in a specific area. Army aviators, for example, make up one group of warrant officers.
Enlisted personnel typically do the following:
Officers typically do the following:
The following are examples of types of occupations for enlisted personnel:
Administrative personnel maintain information on personnel, equipment, funds, and other military-related activities. They work in support areas, such as finance, accounting, legal affairs, maintenance, supply, and transportation.
Combat specialty personnel train and work in combat units, such as the infantry, artillery, or Special Forces. For example, infantry specialists conduct ground combat operations, armored vehicle specialists operate battle tanks, and seamanship specialists maintain ships. Combat specialty personnel may maneuver against enemy forces and fire artillery, guns, mortars, or missiles to neutralize them. They may also operate various types of combat vehicles, such as amphibious assault vehicles, tanks, or small boats. Members of elite Special Forces teams are trained to perform specialized missions anywhere in the world on a moment's notice.
Construction personnel build or repair buildings, airfields, bridges, and other structures. They also may operate heavy equipment, such as bulldozers or cranes. They work with engineers and other building specialists as part of military construction teams. Some construction personnel specialize in an area such as plumbing, electrical wiring, or water purification.
Electronic and electrical equipment repair personnel maintain and repair electronic equipment used by the military. Repairers specialize in an area such as aircraft electrical systems, computers, optical equipment, communications, or weapons systems. For example, weapons electronic maintenance technicians maintain and repair electronic components and systems that help locate targets and help aim and fire weapons.
Engineering, science, and technical personnel perform a variety of tasks, such as operating technical equipment, solving problems, and collecting and interpreting information. They perform technical tasks in information technology, environmental health and safety, or intelligence:
Healthcare personnel provide medical services to military personnel and their family members. They may work as part of a patient-service team with doctors, nurses, or other healthcare professionals. Some specialize in providing emergency medical treatment in combat or remote areas. Others specialize in laboratory testing of tissue and blood samples; maintaining pharmacy supplies or patients' records; assisting with dental procedures; operating diagnostic tools, such as x-ray and ultrasound machines; or other healthcare tasks.
Human resources development personnel recruit qualified people into the military, place them in suitable occupations, and provide training programs:
Machine operator and repair personnel operate industrial equipment and machinery to make and repair parts for a variety of equipment and structures. They may operate engines, nuclear reactors, or water pumps, usually performing a specific job. Welders and metalworkers, for example, work with various types of metals to repair or form the structural parts of ships, buildings, or equipment. Survival equipment specialists inspect, maintain, and repair survival equipment, such as parachutes and aircraft life-support equipment.
Media and public affairs personnel prepare and present information about military activities to the military and the public. They take photographs, make video programs, present news and music programs, or conduct interviews.
Protective service personnel enforce military laws and regulations and provide emergency responses to disasters:
Support service personnel provide services that support the morale and well-being of military personnel and their families:
Transportation and material-handling personnel transport military personnel and cargo. Most personnel within this occupational group are classified according to the mode of transportation, such as aircraft, motor vehicle, or ship:
Vehicle and machinery mechanical personnel conduct preventive and corrective maintenance on aircraft, automotive and heavy equipment, and powerhouse station equipment. These workers specialize by the type of equipment that they maintain:
Enlisted | Army | Air Force | Space Force | Coast Guard | Marine Corps | Navy | Total enlisted personnel in each occupational group |
---|---|---|---|---|---|---|---|
Occupational group | |||||||
Administrative | 5,073 | 13,253 | — | — | 11,933 | 20,393 | 50,652 |
Combat Specialty | 111,710 | 911 | — | — | 39,021 | 9,155 | 160,797 |
Construction | 14,353 | 4,991 | — | — | 6,119 | 3,849 | 29,312 |
Electronic and Electrical Equipment Repair | 28,934 | 28,552 | 4 | — | 14,333 | 50,455 | 122,278 |
Engineering, Science, and Technical | 42,788 | 55,595 | 124 | — | 28,067 | 46,653 | 173,227 |
Healthcare | 25,960 | 14,881 | 1 | — | — | 23,932 | 64,774 |
Human Resource Development | 15,174 | 8,426 | 9 | — | 2,328 | 5,308 | 31,245 |
Machine Operator and Production | 4,153 | 6,695 | — | — | 2,399 | 9,402 | 22,649 |
Media and Public Affairs | 5,345 | 6,769 | — | — | 1,597 | 3,804 | 17,515 |
Protective Service | 20,382 | 34,700 | — | — | 4,872 | 13,686 | 73,640 |
Support Service | 8,574 | 5,553 | — | — | 2,058 | 8,861 | 25,046 |
Transportation and Material Handling | 48,865 | 29,098 | — | — | 23,428 | 38,445 | 136,836 |
Vehicle and Machinery Mechanic | 44,481 | 47,360 | 2 | — | 18,042 | 49,821 | 159,706 |
Non-occupation or unspecified coded personnel | 650 | 5,161 | 2,733 | — | 0 | 932 | 9,476 |
Total enlisted personnel for each military branch and Coast Guard | 373,442 | 261,945 | 2,873 | 31,560 | 154,197 | 284,696 | 1,077,153 |
SOURCE: U.S. Department of Defense, Defense Manpower Data Center |
The following are examples of types of officers:
Combat specialty officers plan and direct military operations, oversee combat activities, and serve as combat leaders. They may be in charge of tanks and other armored assault vehicles, artillery systems, special operations, or infantry units. This group also includes naval surface warfare and submarine warfare officers, combat pilots, and aircrews.
Engineering, science, and technical officers' responsibilities depend on their area of expertise. They work in scientific and professional occupations, such as atmospheric scientists, meteorologists, physical scientists, biological scientists, social scientists, attorneys, and other types of scientists or professionals. For example, meteorologists in the military may study the weather to assist in planning flight paths for aircraft.
Executive, administrative, and managerial officers manage administrative functions in the Armed Forces, such as human resources management, training, personnel, information, police, or other support services. Officers who oversee military bands are included in this category.
Healthcare officers provide medical services to military personnel in order to maintain or improve their health and physical readiness. Officers such as physicians, physician assistants, nurses, and dentists examine, diagnose, and treat patients. Other healthcare officers provide therapy, rehabilitative treatment, and additional healthcare for patients:
Human resource development officers manage recruitment, placement, and training programs in the military:
Media and public affairs officers oversee the development, production, and presentation of information or events for the military and the public. They manage the production of videos and television and radio broadcasts that are used for training, news, and entertainment. Some plan, develop, and direct the activities of military bands. Public affairs officers respond to public inquiries about military activities and prepare news releases.
Protective service officers are responsible for the safety and protection of individuals and property on military bases and vessels. Emergency management officers plan and prepare for all types of disasters. They develop warning, evacuation, and response procedures in preparation for disasters. Law enforcement and security officers enforce all applicable laws on military bases and oversee investigations of crimes.
Support services officers manage military activities in key functional areas, such as logistics, transportation, and supply. They may oversee the transportation and distribution of materials by ground vehicles, aircraft, or ships. They also direct food service facilities and other support activities. Purchasing and contracting managers negotiate and monitor contracts for equipment, supplies, and services that the military buys from the private sector.
Transportation officers manage and perform activities related to the safe transport of military personnel and equipment by air, ground, and water. They operate and command an aircraft or a ship:
Officer | Army | Air Force | Space Force | Coast Guard | Marine Corps | Navy | Total officer personnel in each occupational group |
---|---|---|---|---|---|---|---|
Occupational group | |||||||
Combat Specialty | 22,081 | 3,692 | 45 | — | 4,643 | 6,303 | 36,764 |
Engineering, Science, and Technical | 24,750 | 13,773 | 2,653 | — | 5,113 | 11,315 | 57,604 |
Executive, Administrative, and Managerial | 13,601 | 6,942 | 757 | — | 2,684 | 6,732 | 30,716 |
Healthcare | 10,828 | 9,333 | — | — | none | 7,690 | 27,851 |
Human Resource Development | 3,104 | 1,665 | — | — | 812 | 3,436 | 9,029 |
Media and Public Affairs | 341 | 353 | — | — | 335 | 259 | 1,288 |
Protective Service | 3,273 | 1,104 | — | — | 385 | 1,232 | 5,994 |
Support Service | 1,749 | 828 | — | — | 39 | 1,040 | 3,656 |
Transportation | 10,576 | 23,032 | 21 | — | 7,085 | 10,079 | 50,793 |
Non-occupation or unspecified coded personnel | 2,427 | 221 | 8 | — | 966 | 7,608 | 11,230 |
Total officer personnel for each military branch and Coast Guard | 92,730 | 60,943 | 3,496 | 8,648 | 22,062 | 55,694 | 234,925 |
SOURCE: U.S. Department of Defense, Defense Manpower Data Center |
More than 2.1 million people serve in the Armed Forces. More than 1.3 million are on active duty, including the following subtotals:
Army | 470,519 |
Navy | 344,778 |
Air Force | 326,900 |
Marines | 176,259 |
Space Force | 6,369 |
In addition, about 794,137 people serve in the Reserves in these branches and in the Air National Guard and Army National Guard. About 41,502 people serve in the Coast Guard, which is part of the Department of Homeland Security.
The specific work environments and conditions pertaining to military occupations depend on the occupational specialty, unit, branch of service, and other factors. Most active-duty military personnel live and work on or near military bases and facilities throughout the United States and the world. These bases and facilities usually offer housing and amenities, such as stores and recreation centers.
Service members move regularly for training or job assignments, with most rotations lasting 2 to 4 years. Some are deployed internationally to defend U.S. national interests.
Military members must be both physically and mentally fit, and ready to participate in, or support, combat missions that may be difficult and dangerous and involve long periods away from family. Some personnel, however, are rarely deployed near combat areas.
Table 3 shows employment (excluding Coast Guard) for active-duty officers, warrant officers, and enlisted ranks, by grade and branch of service.
Grade | Army | Navy | Air Force/ Space Force |
Marine Corps | Coast Guard | Active duty personnel
(excluding Coast Guard) |
---|---|---|---|---|---|---|
Commissioned Officers: | ||||||
O-10 | General | Admiral | General | General | Admiral | 39 |
O-9 | Lieutenant General | Vice Admiral | Lieutenant General | Lieutenant General | Vice Admiral | 148 |
O-8 | Major General | Rear Admiral (Upper Half) | Major General | Major General | Rear Admiral (Upper Half) | 286 |
O-7 | Brigadier General | Rear Admiral (Lower Half) | Brigadier General | Brigadier General | Rear Admiral (Lower Half) | 394 |
O-6 | Colonel | Captain | Colonel | Colonel | Captain | 11,204 |
O-5 | Lieutenant Colonel | Commander | Lieutenant Colonel | Lieutenant Colonel | Commander | 27,586 |
O-4 | Major | Lieutenant Commander | Major | Major | Lieutenant Commander | 45,667 |
O-3 | Captain | Lieutenant | Captain | Captain | Lieutenant | 71,308 |
O-2 | 1st Lieutenant | Lieutenant Junior Grade | 1st Lieutenant | 1st Lieutenant | Lieutenant Junior Grade | 34,776 |
O-1 | 2nd Lieutenant | Ensign | 2nd Lieutenant | 2nd Lieutenant | Ensign | 24,381 |
Warrant Officers: | ||||||
W-5 | Chief Warrant Officer 5 | Chief Warrant Officer 5 | — | Chief Warrant Officer 5 | 759 | |
W-4 | Chief Warrant Officer 4 | Chief Warrant Officer 4 | — | Chief Warrant Officer 4 | Chief Warrant Officer 4 | 2,701 |
W-3 | Chief Warrant Officer 3 | Chief Warrant Officer 3 | — | Chief Warrant Officer 3 | Chief Warrant Officer 3 | 4,758 |
W-2 | Chief Warrant Officer 2 | Chief Warrant Officer 2 | — | Chief Warrant Officer 2 | Chief Warrant Officer 2 | 7,548 |
W-1 | Warrant Officer 1 | — | Warrant Officer 1 | 3,369 | ||
Enlisted Personnel: | ||||||
E-9 | Sergeant Major | Master Chief Petty Officer | Chief Master Sergeant | Sergeant Major/Master Gunnery Sergeant | Master Chief Petty Officer | 10,464 |
E-8 | First Sergeant/Master Sergeant | Senior Chief Petty Officer | Senior Master Sergeant | First Sergeant/Master Sergeant | Senior Chief Petty Officer | 27,405 |
E-7 | Sergeant First Class | Chief Petty Officer | Master Sergeant | Gunnery Sergeant | Chief Petty Officer | 93,769 |
E-6 | Staff Sergeant | Petty Officer First Class | Technical Sergeant | Staff Sergeant | Petty Officer First Class | 170,541 |
E-5 | Sergeant | Petty Officer Second Class | Staff Sergeant | Sergeant | Petty Officer Second Class | 223,483 |
E-4 | Corporal/Specialist | Petty Officer Third Class | Senior Airman | Corporal | Petty Officer Third Class | 266,159 |
E-3 | Private First Class | Seaman | Airman First Class | Lance Corporal | Seaman | 189,892 |
E-2 | Private | Seaman Apprentice | Airman | Private First Class | Seaman Apprentice | 61,284 |
E-1 | Private | Seaman Recruit | Airman Basic | Private | Seaman Recruit | 34,155 |
SOURCE: U.S. Department of Defense, Defense Manpower Data Center |
Members of the military are often placed in dangerous situations with the risk of serious injury or death. Members deployed to combat zones or those who work in dangerous areas, such as the flight deck of an aircraft carrier, face a higher risk of injury or death.
Military personnel on active duty typically work full time. However, hours vary with the person's occupational specialty, rank, and branch of service, as well as with the needs of the military. Personnel must be prepared to work additional hours to fulfill missions.
To join the military, applicants must meet age, education, aptitude, physical, and character requirements. These requirements vary by branch of service and for officers and enlisted members.
Although entry requirements for each service vary, certain qualifications for enlistment are common to all branches:
Applicants who are 17 years old must have the consent of a parent or legal guardian before entering the military.
Age limits for entering active-duty service are as follows:
All applicants must meet certain physical requirements for height, weight, vision, and overall health. Officers must be U.S. citizens. Officers and some enlisted members must be able to obtain a security clearance. Candidates interested in becoming officers through training in the federal service academies must be unmarried and without dependents.
Service members are assigned an occupational specialty based on their aptitude, previous training, and the needs of their branch of service. All members must sign a contract and commit to a minimum term of service.
A recruiter can help a prospective service member determine whether he or she qualifies for enlistment or as an officer. A recruiter can also explain the various enlistment options and describe the military occupational specialties.
Women are now eligible to enter all military specialties.
Become an enlisted member
Prospective recruits who wish to enlist must take a placement exam called the Armed Forces Vocational Aptitude Battery (ASVAB), which is used to determine an applicant's suitability for military occupational specialties.
A recruiter can schedule applicants to take the ASVAB without any obligation to join the military. Many high schools offer the exam as a way for students to explore the possibility of a military career. The selection for a certain job specialty is based on ASVAB test results, the physical requirements for the job, and the needs of the service.
Applicants who decide to join the military must pass the physical examination before signing an enlistment contract. The contract involves a number of enlistment options, such as the length of active-duty or reserve-duty time, the length and kind of job training, and the amount of bonuses that may be earned, if any. Most active-duty programs have first-term enlistments of 4 years, although there are some 2-, 3-, and 6-year programs.
All branches of the Armed Services offer a delayed-entry program allowing candidates to postpone entry to active duty for up to one year after enlisting. High school students can enlist during their senior year and enter service after graduation. Others may delay entry because their desired job training is not immediately available or because they need time to arrange their personal affairs.
Become an officer
To become an officer, candidates typically need to have at least a bachelor's degree, be a U.S. citizen, pass a background check, and meet physical and age requirements. Candidates for officer positions do not need to take the ASVAB. Some achieve officer candidacy by completing a degree and training through the federal service academies (Army , Navy , Air Force , Coast Guard , and Merchant Marine ) or through the Reserve Officers' Training Corps (ROTC) programs offered at many colleges and universities.
All branches of the Armed Forces require their members to be high school graduates or have equivalent credentials. Officers usually need a bachelor's degree. Some officers entering the service may need to have education beyond a bachelor's degree. For example, officers entering as military lawyers need a law degree.
Those who want to become an officer have several options to meet the education requirements, including the aforementioned federal service academies (Army, Navy, Air Force, Coast Guard, and Merchant Marine), the Reserve Officers' Training Corps (ROTC) programs, Officer Candidate School (OCS), and other programs.
Leadership skills. Members of the Armed Forces work together to achieve their missions. Those who want to advance ranks need to be able lead others in the completion of assigned duties or missions.
Mental preparedness. Members of the Armed Forces must be mentally fit and able to handle stressful situations that can occur during military operations.
Physical fitness. Members of the Armed Forces must be physically fit to participate in, or support, combat missions that may be difficult or dangerous.
Readiness. Members of the Armed Forces must be ready and able to report for military assignments on short notice.
Training for enlisted personnel. Newly enlisted members of the Armed Forces undergo initial-entry training, better known as basic training or boot camp. Basic training includes courses in military skills and protocols and lasts 7 to 13 weeks, including a week of orientation and introduction to military life. Basic training also includes weapons training, team building, and rigorous physical exercise designed to improve strength and endurance.
Following basic training, enlisted members attend technical schools for additional training that prepares them for a particular military occupational specialty. This formal training period generally lasts from 10 to 20 weeks. Training for certain occupations—nuclear power plant operator, for example—may take as long as a year. In addition to getting technical instruction, military members receive on-the-job training at their first duty assignment.
Training for warrant officers. All services except the U.S. Air Force have warrant officer programs. Selection to attend Warrant Officer Candidate School is highly competitive and is restricted to those who meet rank and length-of-service requirements. The only exception is the selection process for Army aviator warrant officers, a process that has no requirement of previous military service. Training may last several weeks.
Training for officers. Officer training in the Armed Forces is provided through the federal service academies (Army, Navy, Air Force, Coast Guard, and Merchant Marine), the Reserve Officers' Training Corps (ROTC) program, Officer Candidate School (OCS) or Officer Training School (OTS), the National Guard (State Officer Candidate School programs), and the Uniformed Services University of the Health Sciences .
Depending on the occupational specialty, members of the military may need to have and maintain civilian licenses or certifications. For example, officers serving as lawyers, also known as judge advocates, may need to have and maintain their state bar licenses to enter and remain in the U.S. military.
Each branch of the military has different criteria for determining the promotion of personnel. Criteria for promotion may include time in service and in grade, job performance, a fitness report, and passing scores on written exams. Enlisted personnel can be promoted to higher ranks, which may include serving in a supervisory position and being in charge of junior enlisted members.
Each military service may have other advancement opportunities for its enlisted personnel. For example, enlisted personnel may become warrant officers if they complete a bachelor's degree, have several years of experience in higher enlisted positions, and meet age and physical requirements. The Army offers a direct enlistment option to become a warrant officer aviator.
Officers can also be promoted to higher ranks, which may include the command of a military unit of both enlisted members and officers, or being in charge of an entire military base.
Basic pay is based on rank and time in service. Pay bands are the same for all branches. Members of the Armed Forces may receive additional pay based on their job assignment or qualifications. For example, they receive additional pay for foreign, hazardous, submarine, or flight duty, or for being medical or dental officers. Retirement pay is generally available after 20 years of service.
Military pay tables and information are available from the U.S. Department of Defense, Defense Finance and Accounting Service .
In addition to receiving basic pay, members of the military are either housed free of charge on base or they receive a housing allowance.
Members who serve for a certain number of years may receive other benefits. These benefits may include educational benefits through the Montgomery GI Bill, which pays for a portion of educational costs at accredited institutions; medical care at military or the U.S. Department of Veterans Affairs hospitals; and guaranteed home loans.
Military personnel on active duty typically work full time. However, hours vary with the person's occupational specialty, rank, and branch of service, as well as with the needs of the military. Personnel must be prepared to work additional hours to fulfill missions.
BLS employment projections cover the civilian workforce only.
The goal of the Armed Forces is to maintain a force sufficient to deter, fight, and overcome various threats or conflicts in multiple regions at the same time. Emerging conflicts and global events, however, could lead to changes in the size of the military branches. Consequently, the nation is expected to maintain adequate personnel in the Reserve, Army National Guard, and Air National Guard.
Opportunities should be very good for qualified individuals in all branches of the Armed Forces over the next ten years. All services have needs to fill entry-level and professional positions as current members of the Armed Forces move up through the ranks, leave the service, or retire.
The military has been an all-volunteer force since the end of the draft in 1973. When the economy is thriving and civilian employment opportunities are generally more favorable, it is more difficult for the military to meet its recruitment quotas. It is also more difficult to meet these goals during times of war, when recruitment goals typically rise. During economic downturns, candidates for military service may face competition.
Each of the military services publishes handbooks, fact sheets, and pamphlets describing its entrance requirements, its training opportunities, and other aspects of military careers. These publications are available at all recruiting stations; at most state employment service offices; and in high schools, colleges, and public libraries.
For more information on the individual services, visit
In addition, the Defense Manpower Data Center, an agency of the Department of Defense , maintains a website that provides information and resources for parents, educators, and young adults who are curious about joining military service. To see the information, visit
For more information about military testing, visit
A portion of the information on this page is used by permission of the U.S. Department of Labor.