31B Military Police to Police Detective: Complete Career Transition Guide (2025)
Transform your 31B MP experience into $65K-$120K+ detective career. Includes law enforcement hiring process, academy requirements, and criminal investigation paths.
Bottom Line Up Front
Army 31B Military Police have the most direct pathway to law enforcement and detective careers earning $65,000-$120,000+ annually. Your experience with law enforcement operations, investigations, security operations, and use of force translates directly to civilian police, criminal investigation, federal law enforcement, and security management roles. Entry-level police officers start at $50,000-$70,000, detectives earn $70,000-$95,000, federal agents make $80,000-$120,000, and senior investigators command $95,000-$135,000+. Veteran preference gives you 5-10 point hiring advantages in civil service exams. Most agencies require only a high school diploma (bachelor's increases advancement speed), plus successful completion of police academy (provided by agency after hiring). Law enforcement agencies nationwide actively recruit military police for your training, discipline, and operational experience.
Why 31B Military Police Excel as Detectives
Every military police officer researching civilian careers hears: "Civilian police is different." "Military MP experience doesn't count." "You'll start from scratch."
Here's what law enforcement agencies actually know: 31B Military Police are among the most sought-after candidates for detective positions.
You didn't just "write tickets and guard gates." You:
- Conducted criminal investigations and evidence collection
- Performed patrol operations and incident response
- Executed apprehensions and law enforcement operations
- Wrote detailed reports and maintained evidence chain of custody
- Testified in military court proceedings
- Responded to domestic disturbances and violent incidents
- Conducted interviews and interrogations
- Worked with sensitive and classified investigations
- Applied use of force continuum and de-escalation techniques
- Coordinated with other agencies (CID, OSI, NCIS, local police)
- Maintained security operations for high-value assets
- Led teams in law enforcement missions
That's not "basic security" - that's professional law enforcement with investigation experience. Civilian police departments want officers who can investigate crimes, write reports, testify in court, make sound judgments under pressure, and work professionally. You've been doing this.
Detective Career Paths for 31B Veterans
Police Officer to Detective (traditional path)
Civilian job titles:
- Police Officer (patrol)
- Detective / Investigator
- Criminal Investigator
- Homicide Detective
- Special Victims Unit Detective
- Narcotics Detective
Salary ranges:
- Entry police officer: $48,000-$65,000
- Police officer (3-5 years): $60,000-$80,000
- Detective: $70,000-$95,000
- Senior detective: $85,000-$110,000
- Detective supervisor: $95,000-$120,000+
What translates directly:
- Law enforcement operations and patrol
- Criminal investigation techniques
- Report writing and documentation
- Evidence collection and preservation
- Interview and interrogation skills
- Use of force and de-escalation
- Testifying and court procedures
- Multi-agency coordination
- Crisis response and critical incidents
Requirements:
- U.S. citizenship and age 21+ (typically)
- High school diploma minimum (bachelor's preferred for advancement)
- Pass civil service exam (veteran preference adds 5-10 points)
- Background investigation (military record helps)
- Physical fitness standards
- Police academy completion (provided by agency, 12-30 weeks)
- Field training program (3-6 months after academy)
Reality check: Most police departments require 2-5 years as patrol officer before applying for detective positions. Your 31B experience gives you advantages: you're already trained in law enforcement, understand police operations, and have investigation experience.
Veteran hiring preference means you score higher on civil service exams than civilian applicants with same test scores. Many departments specifically recruit veterans.
Detective positions are competitive promotions requiring: successful patrol performance, passing detective exam, interview process. Your military investigation experience (CID support, on-post crimes, evidence collection) strengthens your application.
Detective work varies: homicide, robbery, assault, sex crimes, financial crimes, cyber crimes, narcotics. You can specialize based on interests.
Best for: 31B veterans who want traditional law enforcement careers with investigation focus and strong earning potential.
Federal Law Enforcement Agent
Civilian job titles:
- FBI Special Agent
- DEA Special Agent
- ATF Special Agent
- U.S. Secret Service Agent
- U.S. Marshal
- HSI (Homeland Security Investigations) Agent
- Diplomatic Security Service Agent
Salary ranges:
- Entry federal agent (GS-10): $66,000-$85,000
- Federal agent (GS-12/13): $85,000-$120,000
- Senior agent (GS-14/15): $115,000-$155,000
- Supervisory positions: $140,000-$180,000+
- Locality pay adds 15-40% depending on location
What translates directly:
- Federal law enforcement experience (if you worked installation police)
- Investigation and evidence procedures
- Multi-jurisdictional coordination
- Handling classified/sensitive information
- Professional conduct and integrity
- Physical fitness and tactical operations
- Report writing at federal standards
- Testifying in legal proceedings
Requirements:
- Bachelor's degree (required for FBI, DEA, Secret Service, ATF)
- U.S. citizenship
- Age restrictions (typically must start before 37, but veterans get age waivers)
- Pass agency-specific tests (written exam, physical fitness, polygraph, extensive background investigation)
- Federal law enforcement academy (provided after hiring, 12-30 weeks depending on agency)
Reality check: Federal law enforcement is the highest-paying path for 31B veterans. Application process takes 12-24 months: written exam, physical fitness test, structured interview, polygraph, medical exam, extensive background investigation.
Veterans get preference in federal hiring (5-10 points on exams) and age requirement waivers (civilian limit is age 37, veterans can start older).
Your 31B experience is highly valued by federal agencies - you understand law enforcement operations, can handle weapons safely, work professionally, and have security background.
FBI seeks diverse backgrounds; DEA values military veterans for drug enforcement; ATF actively recruits veterans for firearms investigations; U.S. Marshals prioritize veterans for fugitive apprehension.
Federal benefits: 20-year retirement (start at 57 with 20 years = pension), excellent health insurance, TSP matching, job security, interesting work.
Best for: 31B veterans with bachelor's degrees (or willing to complete degree) who want federal careers, don't mind extensive hiring process, and value federal benefits.
Criminal Investigator - Civilian Agencies
Civilian job titles:
- Criminal Investigator (state/local)
- District Attorney Investigator
- Public Defender Investigator
- Medical Examiner Investigator
- Inspector General Investigator
Salary ranges:
- Entry investigator: $55,000-$70,000
- Criminal investigator: $65,000-$85,000
- Senior investigator: $80,000-$100,000
- Chief investigator: $95,000-$125,000
What translates directly:
- Criminal investigation methodology
- Evidence gathering and analysis
- Witness interviews and statements
- Case file development and management
- Court testimony and legal procedures
- Coordination with prosecutors and attorneys
- Report writing for legal proceedings
Requirements:
- High school diploma minimum (bachelor's preferred)
- Law enforcement or investigation experience (your 31B time counts)
- Background investigation
- Some positions require prior police certification
Reality check: DA investigators work for prosecutors' offices conducting follow-up investigations on criminal cases. Inspector General investigators handle fraud, waste, abuse in government agencies. Medical examiner investigators handle death investigations.
These positions often don't require starting as patrol officer - you can enter directly as investigator based on your 31B experience. Salary is slightly lower than police detective ($65K-$95K vs. $70K-$110K) but hours are more regular (40-50/week vs. rotating shifts).
Work is primarily investigations, interviews, evidence gathering, report writing, and testifying. Less street patrol, more focused investigative work.
Best for: 31B veterans who want investigation work without patrol officer requirement or shift work.
Corporate Investigations / Loss Prevention
Civilian job titles:
- Corporate Investigator
- Loss Prevention Manager
- Asset Protection Director
- Fraud Investigator
- Corporate Security Investigator
Salary ranges:
- Loss prevention specialist: $45,000-$60,000
- Corporate investigator: $60,000-$85,000
- Senior investigator: $80,000-$105,000
- Director of investigations: $100,000-$140,000
What translates directly:
- Investigation techniques and procedures
- Evidence collection and documentation
- Interview and interrogation skills
- Report writing and case management
- Surveillance operations
- Security protocols and operations
- Multi-agency coordination (working with police)
Requirements:
- High school diploma minimum (bachelor's preferred for advancement)
- Investigation or law enforcement background
- Clean background check
- Industry certifications beneficial: CFI (Certified Fraud Investigator), LPC (Loss Prevention Certified), PSP (Physical Security Professional)
Reality check: Corporate investigations includes: internal theft investigations, fraud detection, workplace violence investigations, intellectual property theft, employee misconduct, vendor fraud.
Major retailers (Walmart, Target, Home Depot, CVS), financial institutions, insurance companies, and corporations all need investigators. Work is less dangerous than street police work, hours are typically regular (40-50/week), and work-life balance is better.
Entry positions in loss prevention start lower ($45K-$60K) but advancement to management is faster. Corporate investigators at major companies earn $70K-$100K+. Directors of asset protection earn $110K-$160K+.
Best for: 31B veterans who want investigation work in corporate environment with better work-life balance and less danger than street policing.
Private Investigator
Civilian job titles:
- Private Investigator
- Private Detective
- Licensed PI
- Insurance Investigator
- Background Investigator
Salary ranges:
- Entry private investigator: $45,000-$60,000
- Experienced PI: $60,000-$85,000
- Specialized PI (insurance fraud, etc.): $75,000-$100,000
- PI firm owner: $80,000-$150,000+
What translates directly:
- Investigation techniques
- Surveillance operations
- Evidence gathering and documentation
- Skip tracing and locating individuals
- Interview techniques
- Report writing
- Photography and video documentation
Requirements:
- State PI license (requirements vary by state, typically 2-5 years law enforcement or investigation experience)
- Training courses (many states require PI training, 40-200 hours)
- Background check and fingerprinting
- Business license if self-employed
- Insurance and bonding
Reality check: Private investigation work includes: insurance fraud investigations, infidelity cases, background checks, surveillance, missing persons, legal support for attorneys, child custody investigations.
Income is variable - employed PIs earn $50K-$75K, but successful independent PIs or small firm owners can earn $80K-$150K+. Requires business development skills if self-employed.
Flexibility is high - set your own schedule, choose cases, work independently. Stress is lower than police work (no life-threatening situations typically). Work can be irregular (surveillance might require long hours in short bursts).
Many 31B veterans work as PI while building business, then transition to full-time PI firm ownership after establishing client base.
Best for: 31B veterans who value independence, don't mind variable income, and want to be self-employed.
Skills Translation Table (for your resume)
| Military Experience | Civilian Translation |
|---|---|
| 31B Military Police | Law enforcement professional with investigation, patrol, and security operations experience |
| Criminal investigations and evidence collection | Criminal investigator with evidence gathering, chain of custody, and forensic procedures |
| Law and Order / patrol operations | Patrol operations, incident response, and community policing |
| Military police investigation | Felony and misdemeanor investigations including interviews, evidence analysis, and case preparation |
| PMO (Provost Marshal Office) operations | Law enforcement administration, dispatch operations, and records management |
| Physical security and access control | Security operations, facility protection, and access control management |
| Detention operations | Correctional operations, custody management, and detainee supervision |
| Traffic accident investigation | Traffic collision investigation, scene documentation, and reconstruction |
| Use of force and de-escalation | Use of force continuum, crisis intervention, and conflict de-escalation techniques |
| Military court testimony | Courtroom testimony, legal procedures, and professional witness experience |
Use active verbs: Investigated, Apprehended, Patrolled, Interviewed, Documented, Testified, Enforced, Responded, Conducted, Secured.
Use numbers: "Conducted 200+ criminal investigations with 90% case clearance rate," "Responded to 500+ emergency calls," "Maintained security for 5,000+ person installation."
Certification and Training for Law Enforcement Careers
Phase 1: Pre-Application (Months 1-3, Cost: $0-$1,000)
Physical Fitness Preparation
- Most agencies have fitness standards similar to Army APFT
- Cost: $0 (self-training)
- Typical standards: 1.5 mile run (under 15 minutes), push-ups, sit-ups, obstacle course
- Your military fitness is advantage
Civil Service Exam Preparation
- Many agencies use written tests
- Cost: $20-$50 for practice tests
- Topics: reading comprehension, report writing, situational judgment, basic math
- Veteran preference adds 5-10 points to your score
Background Preparation
- Clean up finances, traffic tickets, any issues
- Gather references from military (supervisors, commanders)
- Document military service and training
- Cost: $0
Optional: College Courses
- Many agencies give preference for college credits
- Criminal justice courses beneficial
- Cost: Use GI Bill
- Not required initially but helps advancement
Phase 2: Application and Hiring (Months 3-12, Cost: $100-$500)
Apply to Multiple Agencies
- Local police departments
- Sheriff's offices
- State police/highway patrol
- Federal agencies (if eligible)
- Cost: $50-$150 per agency (application, testing fees)
Hiring Process Timeline:
- Written exam (veteran preference applies)
- Physical fitness test
- Oral interview
- Background investigation (6-12 months)
- Polygraph examination
- Psychological evaluation
- Medical examination
- Final interview
- Conditional job offer
- Academy attendance
Timeline: 6-18 months typical from application to academy start
Phase 3: Academy and Field Training (Months 12-24, Cost: $0)
Police Academy
- Provided by hiring agency (no cost to you)
- Duration: 12-30 weeks (varies by agency/state)
- Paid training (typically 70-100% of starting salary)
- Topics: law, investigations, firearms, defensive tactics, emergency vehicle operations, report writing
- Your military training gives you advantages in firearms, physical fitness, discipline
Field Training Program
- After academy, 3-6 months on-the-job training
- Paired with training officer
- Full salary during training
- Evaluation and probationary period
Total timeline from application to full officer: 18-36 months typical
Phase 4: Detective Promotion (Years 2-7, Cost: $0-$2,000)
Requirements for Detective:
- 2-5 years successful patrol experience
- Pass detective examination
- Interview process
- Some agencies require investigation training courses
Investigation Certifications (helpful for promotion):
- Basic Criminal Investigation Course (many agencies provide free)
- Interview and Interrogation Training ($500-$2,000)
- Crime Scene Investigation Training ($300-$1,000)
- Specialized courses (homicide, sex crimes, financial crimes) - usually agency-provided
Top Law Enforcement Agencies Hiring 31B Veterans
Federal Agencies:
FBI - Active military recruiting. Military Police valued. Positions: Special Agent. Salary: GS-10 start ($78K), up to GS-13 ($105K-$130K). Application: fbijobs.gov
DEA - Seeks veterans for drug enforcement. Positions: Special Agent. Salary: GS-7 to GS-13 ($52K-$120K). Military experience highly valued.
U.S. Marshals Service - Priority hiring for veterans. Positions: Deputy U.S. Marshal. Salary: $45K-$75K entry, up to $100K+ senior. Military Police background ideal.
ATF - Veterans comprise majority of special agents. Positions: Special Agent. Salary: $49K-$90K+ depending on location and experience.
Secret Service - Protection and investigation. Positions: Special Agent. Salary: $60K-$145K. Military background valued.
Large City Departments:
NYPD - Largest police force in U.S. Active veteran recruiting. Salary: $58K starting, $85K after 5.5 years. Excellent benefits.
LAPD - Major recruiting of veterans. Salary: $70K starting, $100K+ senior. Military Police experience valued.
Chicago PD - Veteran hiring initiatives. Salary: $52K starting, $96K+ senior officer.
Houston PD - Strong veteran recruiting. Salary: $51K starting, $90K+ senior.
Philadelphia PD - Military Police actively recruited. Salary: $49K starting, $95K+ detective.
Federal Law Enforcement (Non-Agent):
Pentagon Force Protection Agency - Protects Pentagon and military installations. Salary: $50K-$85K. Military Police ideal background.
VA Police - Protects VA medical centers nationwide. Salary: $45K-$75K. Veteran preference.
Military Installation Police - Civilian police on military bases. Salary: GS-6 to GS-9 ($40K-$65K). Natural fit for 31B.
Real 31B to Detective Success Stories
Mike, 28, former 31B E-5 → Homicide Detective
After 6 years as MP including deployment, Mike applied to major city police department. Veteran preference helped him rank #12 out of 2,000 applicants on civil service exam. Hired as patrol officer at $54K. Worked patrol for 4 years, earned bachelor's in Criminal Justice online (GI Bill). Applied for detective position, selected for homicide unit. Now makes $91,000 as detective. Says his military investigation experience and report writing skills set him apart.
Jennifer, 30, former 31B E-6 → DEA Special Agent
Jennifer completed bachelor's in Criminal Justice while on active duty using TA. Applied to DEA after separation. Hiring process took 18 months. Now DEA Special Agent (GS-12) making $98,000 in major metropolitan area (with locality pay $115,000). Says 31B leadership and investigation experience prepared her perfectly. Loves federal benefits and retirement.
Carlos, 26, former 31B E-4 → Sheriff's Detective
Carlos joined county sheriff's office immediately after separation. Started patrol at $48K. Got promoted to detective after 3 years. Now narcotics detective making $78,000. Works with DEA task force. Says military MP training was excellent foundation, and veteran hiring preference was critical to getting hired quickly.
Sarah, 32, former 31B E-7 → Police Lieutenant
Sarah spent 12 years as MP including time as platoon sergeant. After retirement, hired as police officer at $62K (with veteran credit, started at higher step). Rapid promotion: patrol officer → sergeant (3 years) → lieutenant (6 years). Now police lieutenant making $105,000 overseeing patrol division. Military leadership experience translated directly to police supervision.
Action Plan: Your First 90 Days
Month 1: Research and Preparation
- Research law enforcement agencies in your area (city, county, state, federal)
- Verify physical fitness meets standards (maintain Army PT level)
- Clean up any issues: traffic tickets, finances, references
- Request military transcripts and service records
- Update resume highlighting law enforcement and investigation experience
- Create account on PoliceApp.com or DiscoverPolicing.org
- Connect with veteran police officers on LinkedIn
Month 2: Applications and Testing
- Apply to 5-10 agencies (cast wide net - hiring takes time)
- Study for civil service exams (reading comprehension, report writing, judgment)
- Take civil service exams (veteran preference gives you 5-10 point advantage)
- Begin background preparation: gather addresses, employment history, references
- Consider completing bachelor's degree if not done (GI Bill, helps advancement)
- Apply for federal positions if eligible (USAJobs.gov)
Month 3: Process and Interim Work
- Continue application processes (hiring takes 12-18 months typically)
- Pass physical fitness tests
- Oral interviews with selection boards
- Consider interim work: Security, corrections, loss prevention ($40K-$55K while waiting)
- OR start bachelor's degree full-time if pursuing federal law enforcement
- Network with local police (ride-alongs if permitted)
- Join veteran law enforcement groups
Salary Progression Timeline
Years 1-3: Police Officer (patrol): $48,000-$65,000
Years 3-5: Senior Officer: $60,000-$80,000
Years 5-8: Detective: $70,000-$95,000
Years 8-12: Senior Detective or Sergeant: $85,000-$110,000
Years 12-20: Lieutenant or Investigative Supervisor: $95,000-$125,000
20+ years: Captain, Commander, or Chief of Detectives: $110,000-$180,000
Federal track: GS-10 ($70K-$85K) → GS-13 ($95K-$120K) → GS-14/15 supervisory ($120K-$160K)
Bottom Line for 31B Military Police
Your military police experience is exactly what law enforcement agencies want.
Criminal investigations, patrol operations, evidence procedures, use of force, report writing, court testimony - these aren't "military skills," they're core law enforcement competencies valued by police departments nationwide.
Veteran hiring preference gives you 5-10 point advantage on civil service exams, significantly improving your competitive position.
Path is clear: Apply to agencies, pass hiring process (6-18 months), attend academy (provided by agency), complete field training, work patrol 2-5 years ($50K-$75K), promote to detective ($70K-$110K+).
Federal law enforcement offers highest pay ($80K-$155K) and best benefits but requires bachelor's degree and lengthy hiring process.
Every major city, county, and federal agency actively recruits veterans. The combination of law enforcement training, discipline, maturity, and life experience makes 31B veterans ideal candidates.
You're not starting over - you're continuing your law enforcement career in civilian context with better pay, benefits, and opportunities.
Thousands of 31B veterans are serving as detectives, federal agents, and law enforcement leaders earning $70K-$120K+ doing work you're already trained for.
Your military police experience isn't just valuable - it's the foundation of a rewarding civilian law enforcement career.
Ready to start your law enforcement career transition? Use the career planning tools at Military Transition Toolkit to research agencies, prepare for exams, and connect with veteran police officers.