Criminal Justice Careers: Law Enforcement, Courts & Corrections
Criminal justice careers fall into three branches: law enforcement, the courts, and corrections. What you can do with the degree ranges from patrol officer to forensic scientist, paralegal to probation officer. Minimum education varies by state, agency, and role: many entry-level jobs need only a high school diploma, while federal and legal careers typically call for a bachelor’s or higher.
A career in criminal justice could land you in a courtroom, a forensics laboratory, a patrol car, or an office inside a federal agency that employs more than 260,000 people. This guide covers the three main branches of the system, law enforcement, the courts, and corrections, and the most common careers within each one. Exact education, academy, and licensing requirements vary by state, agency, and jurisdiction, so treat the figures here as a starting point for your own research, not a nationwide standard.
How to Begin a Career in Criminal Justice
The Bureau of Justice Statistics developed a flowchart that outlines the many varied paths suspects can take from the moment a crime is committed to the time they exit the system. The visual aid is a massive and tangled web that, at a glance, looks more like a New York City subway map than an instructional chart. It details dozens of points into, out of, and through the system—and each one requires the work of criminal justice professionals. (For a closer look at how those pieces fit together, see The Three Components of Criminal Justice.)
This page organizes careers into three broad branches, though plenty of criminal justice work, forensic science, private security, intelligence, emergency management, victim services, and regulatory investigations among them, cuts across more than one. Your choices of majors, concentrations, and degrees are just as varied as the careers themselves.
Many jobs involved with each of those paths begin with a bachelor’s degree. It’s possible, in some fields in some parts of the country, to begin a career with a high school diploma. In most cases, however, you’ll need an undergraduate degree or at least an associate degree to be a competitive candidate, even where it’s not technically required. This is especially true for federal agent roles at agencies like the FBI, DEA, and DHS, where a bachelor’s degree is typically part of the hiring pathway, though not every job within those agencies requires one. If a bachelor’s is next for you, explore Bachelor’s Degree in Criminal Justice programs to see what the coursework actually covers.
Jobs in the Three Branches of the Criminal Justice System: An Overview
Here’s a look at the three branches most criminal justice careers fall under:
Law Enforcement
Law enforcement officers are the first line of defense. They enforce the laws of their communities and country and intervene when people break those laws.
Sworn officers, including police officers and detectives, patrol communities, conduct investigations, make arrests, and gather evidence to build cases against suspects. This section also covers civilian specialists, like forensic science technicians, who support that work without carrying police powers themselves, and the broader world of DHS personnel. The list of law enforcement and related careers is much longer than what’s covered here; it doesn’t include police dispatchers, customs and border patrol agents, crime scene investigators, FBI and DEA agents, or federal marshals, among others. Law enforcement officers and organizations often work together.
Police Officers
Police officers are usually the first to make hands-on contact with people suspected of breaking the law. They patrol neighborhoods, respond to emergency calls, pursue, apprehend, and process suspects, gather evidence, interview witnesses, enforce traffic laws, investigate accidents, testify in court, and enforce court orders.
As of May 2025, 670,520 police and sheriff’s patrol officers work America’s streets and highways, according to the Bureau of Labor Statistics. Their median annual salary is $76,210. ProjectionsCentral projects about 3% employment growth from 2024 to 2034.
Minimum education, academy requirements, and hiring standards vary widely by state and agency. Most departments require at least a high school diploma; some set the bar at an associate degree, and a few only consider candidates with a bachelor’s. Education can factor into promotion decisions at some agencies, but it isn’t a universal requirement for advancement. Police officers also complete academy training, but the certifying body, academy structure, required coursework, and exams differ by state; there’s no single national certification pathway. Most agencies also require a probationary period after hire.
Detectives
Although they generally have police powers, detectives focus on conducting post-crime investigations more than crime prevention and suspect apprehension. As of May 2025, America’s 114,430 detectives earn a median salary of $93,790, according to the BLS. That’s the highest wage of any role on this page outside the courts. ProjectionsCentral puts 2024-34 growth at roughly flat (-0.7%) nationally. They use preliminary evidence gathered by police officers to investigate crimes. During the course of their investigations, they’ll gather evidence of their own, including physical, testimonial, forensic, digital, statistical, documentary, and demonstrative evidence to further their investigations, identify and track down suspects, and build cases.
Detectives work for police departments and sheriff’s offices as well as for federal agencies like the FBI, the Department of Homeland Security, and the U.S. Postal Service. At many agencies, detectives start out as uniformed patrol officers and test into the role through a promotional exam, but the required patrol experience, selection process, and whether detective is a promotion or a lateral assignment all vary by department.
Forensic Science Technicians and Forensic Scientists
A bachelor’s degree is the typical entry-level education for forensic science technicians, according to the BLS, though specific employer requirements vary. America employs 19,120 of them, earning a median annual salary of $72,060 as of May 2025. If you pursue forensic science, you’ll split your work between crime scenes and the lab. Tasks include analyzing crime scenes, looking for evidence, and determining what evidence to collect and preserve. You might record the crime scene through photography or other documentation, or work to recreate the scene of a crime or an accident.
In the lab, you’ll analyze evidence collected in the field, including anything from biological evidence like hair and blood to physical evidence like tire tracks, tool marks, or shell casings. You might also consult with other experts in fields like toxicology or DNA and be called to provide expert testimony in court. ProjectionsCentral puts 2024-34 job growth at about 13%, well ahead of most roles on this page.
Homeland Security Careers
The Department of Homeland Security (DHS) is a massive, sprawling federal agency formed in the wake of the terrorist attacks on Sept. 11, 2001. It’s made up of hundreds of distinct occupations across multiple components, and education and qualification requirements vary accordingly; some roles weigh a combination of education and experience rather than requiring a specific degree. DHS states that more than 260,000 people work across the department in careers ranging from cybersecurity to border enforcement to aviation.
Those employees have a huge variety of duties, all focused on the same general mission: safeguarding the United States. DHS personnel work in cybersecurity, border enforcement, and aviation. They inspect chemical facilities, respond to disasters, and pursue leads about domestic and foreign terrorist plots, just to name a few of the department’s responsibilities.
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The Courts
Criminal justice professionals work to prove or disprove charges against apprehended suspects or decide their level of culpability.
The courts are where people apprehended by law enforcement receive due process regarding the charges against them. The Sixth Amendment guarantees the right to counsel in criminal prosecutions, attaching at specific stages of the process; it isn’t a blanket right for anyone merely suspected of a crime. Like law enforcement, the courts are organized at municipal, state, federal, and special-jurisdiction levels, and the process varies from one court to the next. Generally, pretrial services are followed by an arraignment, then a trial and, if guilt is determined, sentencing and appeal. Criminal courts employ paralegals, judges, and attorneys, profiled below. The courts also rely on many other professionals to function, including bailiffs, stenographers, and clerks.
Paralegals
Paralegals support lawyers and law firms throughout all phases of legal cases. If you choose to become one, you’ll conduct research, investigate and gather facts, produce legal documents, interview witnesses, draft correspondence, summarize reports, arrange evidence, and assist at trial.
As of May 2025, paralegals earned a median annual salary of $62,890, according to BLS data. An associate degree is a common entry-level credential, though there’s no single national licensing or degree requirement for paralegals; specific rules depend on the employer and, in a handful of states, formal certification programs. ProjectionsCentral’s 2024-34 outlook puts job growth at essentially flat (0.2%).
Attorneys
Also commonly called lawyers, attorneys work on both sides of criminal proceedings and play a crucial role in America’s criminal justice system. Attorneys work as prosecutors representing the government’s attempt to prove the guilt of the people charged, as well as in defense of the accused as private attorneys or public defenders.
As of May 2025, attorneys earn a median salary of $159,670 per year, according to BLS data. ProjectionsCentral’s 2024-34 outlook projects about 4% growth. The typical path runs through a bachelor’s degree and then a Juris Doctor from law school, but admission to practice is governed jurisdiction by jurisdiction; most states require passing a bar exam (the Uniform Bar Exam or a state-specific version) plus a character-and-fitness review, and exact requirements differ by state.
Judges
Judges serve as umpires during trials and all other court procedures. In non-jury trials, they determine guilt or innocence. They oversee fair proceedings by ensuring both the prosecution and defense follow proper procedures. They research legal precedent, evaluate arguments presented by both parties, oversee jury selection, determine which pieces of evidence are admissible, write opinions, issue instructions, and render decisions.
As of May 2025, America’s 24,030 judges, magistrate judges, and magistrates earned a median salary of $153,990, according to BLS data. ProjectionsCentral’s 2024-34 outlook puts job growth at about 3%. Judicial qualifications vary considerably by jurisdiction, court level, and selection method, election or appointment among them. Most judgeships expect a law degree and years of courtroom experience, though some lower-court or specialized judgeships don’t statutorily require a JD.
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Corrections
Those who are found guilty of crimes and require incarceration or supervision are then turned over to America’s large and crowded corrections system.
Once criminal suspects plead guilty or are convicted in the courts, they’re turned over to the custody of the third branch of the criminal justice system: corrections. The Prison Policy Initiative’s Mass Incarceration: The Whole Pie (March 2026) pieces together the most recent available data across prisons, jails, probation, and parole: nearly 2 million people incarcerated, and about 5.6 million people total under correctional control once probation and parole are included. For a closer look at what drives that number and the debate around it, see Why the System Needs Reform. The correctional system also relies on professionals like parole officers, prison wardens, jail administrators, and case managers.
Probation Officers
Also known as community supervision officers, probation officers ensure that people sentenced to probation are complying with the terms of their supervision. That could involve making sure they’re working or looking for work, avoiding the company of criminal associates, not possessing weapons, and not participating in criminal activity. Probation officers assist the people they supervise with rehabilitation, test for drugs, interview their friends, relatives, and associates, and submit reports and make recommendations about their status in the criminal justice system.
As of May 2025, probation officers earn a median salary of $66,270, according to the BLS. There are currently 89,390 positions nationally, and ProjectionsCentral’s 2024-34 outlook puts growth at about 3%. A bachelor’s degree is the typical entry-level credential for this career, though requirements vary by federal, state, and local system.
Correctional Officers
The BLS lists a high school diploma as the typical entry-level education for correctional officers, though state, local, and federal correctional systems each set their own qualifications. It’s a particularly stressful and potentially dangerous job: the position requires you to oversee the prisoners in your custody, whether they were sentenced to jail or prison after being found guilty or are presumed innocent while awaiting trial. Correctional officers enforce rules and keep order in correctional facilities, and supervise, transport, and restrict the movement of prisoners.
As of May 2025, correctional officers earned a median salary of $58,940 a year, according to BLS data. There are currently about 380,500 correctional officers working in America’s jails and prisons, and ProjectionsCentral’s 2024-34 outlook projects employment to keep shrinking, down almost 8%.
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Discover More about Criminal Justice Pathways
Curious what the field looks like beyond individual job titles? Top Criminal Justice Organizations rounds up the professional associations shaping standards across all three branches.
Want another perspective? Read our Q&A with a criminal justice professional already working in the field.
Frequently Asked Questions
What can you do with a criminal justice degree?
A criminal justice degree opens doors across all three branches: policing and federal law enforcement, courtroom roles like paralegal or court reporter, and corrections work like probation or parole. Some of these jobs, like correctional officer, don’t strictly require the degree. Others, like becoming an attorney or an FBI special agent, treat it as a baseline. For more ideas, see 10 Jobs With a Criminal Justice Degree.
Do you need a college degree to work in criminal justice?
Not always. Many police and correctional officer positions set the floor at a high school diploma plus academy or in-service training, but exact minimum qualifications, certification standards, and background requirements are set state by state and agency by agency. Federal roles and the legal profession generally expect a bachelor’s at minimum.
What’s the highest-paying career in criminal justice?
Based on May 2025 BLS wage data, judges and attorneys top this list at $153,990 and $159,670 median annual pay. Both require a law degree, which is a longer and more expensive path than policing, paralegal work, or corrections.
Which branch of criminal justice should I choose?
It depends on what kind of work you want day to day. Law enforcement means fieldwork and public contact. The courts mean research, writing, and procedure. Corrections means supervision and case management, often inside a facility. Read the role descriptions above and picture yourself doing the actual tasks, not just the title.
Key Takeaways
- Three branches, one system – Law enforcement, the courts, and corrections each need different skills and offer different day-to-day work, though some careers cross branch lines.
- Education requirements vary by state and agency – Police and correctional officer jobs can start with a high school diploma in many places; attorneys and most federal roles expect a bachelor’s at minimum.
- Pay varies sharply by role – Correctional officers median $58,940; judges and attorneys median over $150,000, per May 2025 BLS data.
- Growth is uneven – ProjectionsCentral puts forensic science technicians at about 13% growth through 2034, while correctional officer jobs are projected to shrink nearly 8% over the same period.
Not sure which path fits? Start with the bachelor’s degree most of these careers point back to, then come back to this page when you’re ready to pick a specialty.
Full Q&A with Criminal Justice Major Sarah Pierre
