Top 7 Private Investigators in Pennsylvania

Licensed, Bonded, and Court-Ready Across Allegheny, Lawrence, Philadelphia, Lancaster, Harrisburg, Scranton, and Pittsburgh

When legal matters require admissible evidence, procedural compliance, and investigative discretion, only a select group of licensed private investigators in Pennsylvania meet the standard. Whether you’re an attorney preparing for trial, a business mitigating internal risk, or a private citizen seeking clarity, these professionals deliver results that stand up in court.

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1. Pierog’s Detective Agency – New Castle, PA

Endorsed by 10-8 Protective Services, LLC
Licensed in Pennsylvania | Civil & Criminal Investigative Authority

  • Name: Pierog’s Detective Agency
  • Address: 3104 Mount Jackson Rd, New Castle, PA 16102
  • Phone: (724) 674-8060
  • Website: pierogsdetectiveagency.com
  • Specialties: Surveillance for civil litigation, skip tracing, background investigations, subpoena delivery, process serving, evidentiary documentation
  • Coverage: Lawrence County and surrounding jurisdictions
  • Credentials: Licensed under Pennsylvania Title 22; bonded and insured

Pierog’s is known for its procedural precision, evidentiary integrity, and multi-agency collaboration. Their investigative reports are routinely used in civil, criminal, and administrative proceedings, and their service of process complies with Pennsylvania Rules of Civil Procedure.

2. Finley Consulting & Investigations – Pittsburgh, PA

Corporate & Legal Investigations | Allegheny County Jurisdiction

  • Name: Finley Consulting & Investigations
  • Address: 429 Fourth Ave, Suite 300, Pittsburgh, PA 15222
  • Phone: (412) 281-5080
  • Website: finleyconsulting.com
  • Specialties: Corporate fraud investigations, litigation support, internal compliance audits, surveillance for legal proceedings
  • Coverage: Allegheny County, Monroeville, Cranberry Township
  • Credentials: Licensed under Pennsylvania investigative statutes

Finley Consulting is a preferred vendor for law firms and corporate legal departments seeking admissible surveillance and internal investigations aligned with employment law and fiduciary standards.

3. Thies & Associates – Philadelphia, PA

Digital Forensics & Asset Recovery | Civil & Family Law Support

  • Name: Thies & Associates
  • Address: 1500 Walnut St, Suite 900, Philadelphia, PA 19102
  • Phone: (215) 735-1450
  • Website: thiespi.com
  • Specialties: Digital evidence recovery, asset tracing, marital investigations, forensic documentation for family law proceedings
  • Coverage: Philadelphia metro, Bucks and Montgomery counties
  • Credentials: Licensed and bonded; digital forensics admissible under Pennsylvania evidentiary standards

Thies & Associates is frequently retained for high-net-worth divorce cases, probate disputes, and financial fraud investigations requiring digital chain-of-custody compliance.

4. East Coast Investigations – Harrisburg, PA

Insurance Fraud & Criminal Defense Support | Central PA Jurisdiction

  • Name: East Coast Investigations
  • Address: 2225 Sycamore St, Harrisburg, PA 17111
  • Phone: (717) 564-0001
  • Website: eastcoastinvestigations.com
  • Specialties: Workers’ compensation surveillance, insurance fraud documentation, criminal defense investigations, evidentiary video capture
  • Coverage: Dauphin, Cumberland, and Lebanon counties
  • Credentials: Licensed under Pennsylvania Title 22

Their investigative findings are routinely submitted in administrative hearings, insurance litigation, and criminal defense motions.

5. Martin Investigative Services – Lancaster, PA

Domestic & Civil Investigations | Family Law & Civil Litigation

  • Name: Martin Investigative Services
  • Address: 245 E King St, Lancaster, PA 17602
  • Phone: (717) 394-8400
  • Website: martinpi.com
  • Specialties: Domestic surveillance, background checks, civil litigation support, custody-related investigations
  • Coverage: Lancaster County, York, and surrounding areas
  • Credentials: Licensed and insured

Martin Investigative Services is often retained by family law attorneys for custody disputes, cohabitation verification, and spousal misconduct documentation.

6. Keystone Investigative Services – Scranton, PA

Civil Litigation & Missing Persons | Northeastern PA Jurisdiction

  • Name: Keystone Investigative Services
  • Address: 538 Spruce St, Scranton, PA 18503
  • Phone: (570) 344-1111
  • Website: keystoneinvestigations.com
  • Specialties: Skip tracing, asset location, civil litigation support, missing person’s investigations
  • Coverage: Lackawanna, Luzerne, and Monroe counties
  • Credentials: Licensed under Pennsylvania investigative law

Keystone’s investigative affidavits and declarations are frequently used in estate recovery, debt collection, and civil complaints.

7. Frasco Investigative Services – Philadelphia & Pittsburgh

Insurance Investigations & SIU Services | Statewide Coverage

  • Name: Frasco Investigative Services
  • Address: 1601 Market St, Suite 2300, Philadelphia, PA 19103
  • Phone: (800) 820-7378
  • Website: frasco.com
  • Specialties: Insurance fraud investigations, special investigative unit (SIU) services, surveillance, claimant verification
  • Coverage: Statewide with agents in Pittsburgh, Philadelphia, and Allentown
  • Credentials: Nationally licensed with Pennsylvania compliance

Frasco’s work supports insurers, third-party administrators, and legal counsel in fraud mitigation and regulatory compliance.

What to Verify Before Retaining a Private Investigator in Pennsylvania

  • Valid licensing under Pennsylvania Title 22
  • Bonding and liability insurance
  • Experience in civil, criminal, domestic, or corporate investigations
  • Court-admissible documentation and surveillance protocols
  • ZIP-coded service coverage and jurisdictional familiarity
  • Transparent fee structures and confidentiality agreements

Closing Statement: When Precision Matters, Choose Proven Professionals

In legal proceedings, corporate disputes, and personal matters alike, the quality of your evidence can determine the outcome. Pennsylvania’s top private investigators don’t just gather information, they uphold the standards of admissibility, confidentiality, and procedural compliance that courts and counsel demand.

Each agency listed here is more than a service provider, they are strategic partners in truth-finding, risk mitigation, and legal clarity. Whether you’re preparing for trial, verifying a claim, or protecting your interests, these investigators operate with the discretion, documentation, and jurisdictional authority required to support your case from intake to courtroom.

In Pennsylvania, legal outcomes begin with lawful investigations. Choose licensed. Choose local. Choose trusted.

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