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23 Years
experience
Emergency
services
Trusted Private Investigators in Cheyenne, WY
At S J Miller Associates, we bring over four decades of investigative expertise to clients across Wyoming and Northern Colorado. Founded in 2003 by Stephen J. Miller, a seasoned professional with 25 years in law enforcement and advanced certifications, our firm delivers reliable, discreet services tailored to legal, business, and personal needs. Licensed, insured, and bonded, we specialize in criminal investigations, process serving, and risk assessments, with 70% of our business stemming from trusted referrals.

Our team combines extensive trainingincluding FBI National Academy and ASIS certificationswith a commitment to ethical practices and client confidentiality. Whether handling complex legal cases or personal matters, we prioritize accuracy and results, ensuring clients receive actionable insights backed by decades of experience.
Services
Criminal Investigations Process Serving Risk Assessments Background Checks Missing Persons Asset Identification Surveillance Forensic Scene Processing Civil Litigation Support Workplace Investigations
Details
  • Year established: 2003
Highlights and features
  • We offer 40+ years of investigative experience in law enforcement and private sectors.
  • Licensed and certified in Wyoming and Colorado with advanced industry credentials.
  • 70% of our clients come through trusted referrals for reliable results.
  • 24/7 emergency services available for urgent investigative needs.
  • Senior Investigator Stephen J. Miller holds FBI National Academy and ASIS certifications.
Associations and certifications
  • Certified Protection Professional (CPP)
  • Certified Fraud Examiner (CFE)
Services
Criminal Investigations
We conduct thorough criminal investigations for attorneys and private clients, focusing on theft, fraud, embezzlement, and homicide cases. Our team leverages law enforcement expertise and forensic tools to gather evidence, interview witnesses, and support prosecution or defense strategies. With decades of experience, we ensure accurate, legally compliant outcomes for complex cases.
Process Serving
Our process serving ensures timely and accurate delivery of legal documents across Wyoming and Northern Colorado. We specialize in serving subpoenas, summonses, and court papers with strict adherence to jurisdictional requirements. Clients benefit from reliable documentation and court-ready affidavits to support legal proceedings.
Risk Assessments
We identify and mitigate risks for businesses and individuals through comprehensive threat assessments. Services include workplace violence evaluations, cybersecurity risk analysis, and pre-employment background checks. Our approach combines investigative rigor with actionable recommendations to enhance safety and compliance for clients.
Background Checks
Our discreet background investigations cover employment screening, personal history reviews, and due diligence for businesses. We access court records, public databases, and professional references to verify credentials and uncover potential risks. Clients receive detailed reports tailored to their specific needs.
Missing Persons
We assist in locating missing individuals using advanced investigative techniques and public records. Our team works closely with families and legal representatives to gather leads, conduct interviews, and coordinate with law enforcement when necessary. Compassionate and methodical, we prioritize client privacy and resolution.
People
Stephen J. Miller
Senior Investigator
Stephen J. Miller, founder of S J Miller Associates, has over 40 years of investigative experience, including 25 years in law enforcement. A certified Professional Investigator (CPI) and Certified Fraud Examiner (CFE), he holds advanced degrees in public administration and criminal justice. His expertise spans criminal defense, asset recovery, and corporate investigations.
Questions
What services does SJ Miller Associates offer?
We provide criminal investigations, process serving, risk assessments, background checks, and missing persons cases. Our services cater to attorneys, businesses, and individuals in Wyoming and Northern Colorado.
Are your investigators licensed and certified?
Yes, our team includes licensed professionals with certifications such as Certified Protection Professional (CPP) and Certified Fraud Examiner (CFE), ensuring adherence to industry standards.
Do you offer emergency investigative services?
Yes, we provide 24/7 emergency services for urgent matters, including critical incident response and time-sensitive evidence collection.
How experienced is your team?
Our senior investigator, Stephen J. Miller, has over 40 years of experience, including roles with the FBI National Academy and Ohio Attorney General's Office.
What areas do you serve?
We operate throughout Wyoming and Northern Colorado, including Cheyenne and Denver, with capabilities for out-of-state referrals.