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George Mac Donald



Mac Donalds Investigation
10600 Tamarron Drive
Bakersfield CA 93311
United States

Phone: 805-805-659-2646
Website: http://

PI/PPO License Number: PI14371

Specialties: Accident Reconstruction, Industrial Accidents, White Collar Crime


CALI Member since: 04/26/2014
CALI District: Central Coast

Ernest Machado



Machado Investigations
5616 Washington Blvd
645 Temple Ave Long Beach CA 90814
Livingston CA 95334
United States

Phone: 2094952643
Cell Phone: 2094952643

PI/PPO License Number: PI 12474

Specialties: Adjusting Insurance, Asset Checks, Background Investigations, Civil Investigations, Construction Sites, Corporate Investigations, Covert Video, Criminal Investigations, Defense, Domestic, Industrial Accidents, Insurance, Missing Persons, Personal Injury, Missing Heirs, Products Liability, Public Interest Investigations, Skip Trace, Surveillance, White Collar Crime, Workplace Investigations, Missing Pets/Animals, Workers' Comp


CALI Member since: 03/15/2017
CALI District: Golden Valley

Rene Machado



Viacom, Inc.
1575 North Gower Street
Hollywood CA 90028
United States

Phone: (310) 752-8911
Website: http://

PI/PPO License Number: 23507

Specialties: Background Investigations, Bodyguard, Civil Investigations, Corporate Investigations, Domestic, Drugs, Drunk Driving Defense, Executive Protection, Insurance, Patrol, Personal Injury, Process Service, Retired, Security, Skip Trace, Surveillance, Undercover, Workers' Comp, Workplace Investigations


CALI Member since: 12/29/2001
CALI District: Los Angeles

Anthony Macias



Dru Investigations
1815 Pyxis Street
Bakersfield CA 93306
United States

Phone: (661) 324-8661
Website: http://




CALI Member since: 10/24/1996
CALI District: Golden Valley

Don MacRitchie



Neilson & MacRitchie Investigations
PO Box 410187
San Francisco CA 94141-0187
United States

Phone: 415-585-0303

PI/PPO License Number: PI14459

Specialties: Asset Checks, Background Investigations, Civil Investigations, Skip Trace, Surveillance, Trial Preparation


CALI Member since: 09/04/2008
CALI District: San Francisco

Clark Madsen



Atherton Investigations
P.O. Box 386
1017 El Camino Real
Redwood City CA 98064
United States

Phone: 650-208-2079
Cell Phone: 6502082079

PI/PPO License Number: 27078/CA

Specialties: Background Investigations, Bodyguard, Executive Protection, Corporate Investigations, Criminal Investigations, Insurance, Personal Injury, Security, Trial Preparation, Workplace Investigations, Workers' Comp


CALI Member since: 02/17/2011
CALI District: San Jose

Sean Mahoney



S.O.S. Investigations
P.O. Box 2688
Clovis CA 93613
United States

Phone: (559) 392-0395
Website: http://

PI/PPO License Number: PI22893

Specialties: Covert Video, Insurance, Surveillance


CALI Member since: 02/04/2000
CALI District: Golden Valley

Mark Mahoney



Mahoney & Son's Investigations, LLC
27 Descanso Drive
Orinda CA 94563
United States

Phone: 925-388-0595
Website: http://

PI/PPO License Number: 188165

Specialties: Background Investigations, Civil Investigations, Criminal Investigations, Domestic, Workers' Comp


CALI Member since: 03/01/2018
CALI District: East Bay

Jason Majors



Majors Investigations
3110 Porter Creek Road
Santa Rosa CA 95404
United States

Phone: 707-484-9064

PI/PPO License Number: 27239

Specialties: Bodyguard, Civil Investigations, Corporate Investigations, Insurance, Surveillance


CALI Member since: 06/06/2018
CALI District: North Bay

David Makiyama



4171 Ball Rd. #408
Cypress CA 90630
United States

Phone: 7148862075
Website: http://

PI/PPO License Number: 28725



CALI Member since: 01/03/2018
CALI District: Orange

David Mancini



David Mancini
1070 North Batavia Street, 305
Orange CA 92867

Phone: 7143009891
Website: http://

PI/PPO License Number: 22413

Specialties: Adoption, Asset Checks, Auto, Background Investigations, Child Custody, Civil Investigations, Corporate Investigations, Covert Video, Criminal Investigations, Defense, Domestic, Drunk Driving Defense, Industrial Accidents, Insurance, Missing Persons, Mystery Shopping, Personal Injury, Photography, Missing Heirs, Process Service, Products Liability, Skip Trace, Surveillance, Trial Preparation, Undercover, Workplace Investigations, Workers' Comp, Probate/Missing Heirs


CALI District: Orange

Robert Mann



Worldwide Intelligence Network
10100 Galaxy Way
Los Angeles CA 90067
United States

Phone: 310-385-8200

PI/PPO License Number: PI14745

Specialties: Background Investigations, Bank and Accounting Fraud, Bodyguard, Executive Protection, Civil Investigations, Computer Crimes, Corporate Investigations, Covert Video, Criminal Investigations, Defense, Document Examination, Domestic, Identity Theft, Insurance, Medical/Legal Malpractice, Missing Persons, Mystery Shopping, Organized Crime, Personal Injury, Missing Heirs, Products Liability, Public Interest Investigations, Real Estate, Security, Skip Trace, Surveillance, Technical Surveillance Countermeasures, Undercover, White Collar Crime, Workplace Investigations, Missing Pets/Animals, Workers' Comp, Probate/Missing Heirs


CALI Member since: 08/08/2001
CALI District: Los Angeles

William Manspeaker



Action PI, Adjusters & Appraiser
P.O. Box 5776
Napa CA 94581-5776
United States

Phone: (707) 645-8423

PI/PPO License Number: PI9931



CALI District: North Bay

Rick Manzanares



Shield Enterprises LLC
P.O. Box 292462
Sacramento CA 95829
United States

Phone: 916-213-0251
Cell Phone: 916-425-1526

PI/PPO License Number: PI188341

Specialties: Asset Checks, Background Investigations, Boating, Civil Investigations, Computer Crimes, Criminal Investigations, Defense, Executive Protection, Firearms, Human Trafficking, Identity Theft, Insurance, Internet Security, Missing Persons, Motorcycle, Patrol, Process Service, Public Interest Investigations, Real Estate, Skip Trace, Surveillance, Undercover, White Collar Crime, Workers' Comp, Workplace Investigations

Education and Experience: 16 years law enforcement/criminal investigations. 6 years as full-time sworn investigator County of San Mateo. 7 years police South San Francisco PD. 4 Years Elk Grove PD. 8 month PI with HUB Enterprises. BS Criminal Justice Degree - Graduated Summa Cum Laude. Master's Degree Management Info Systems.

CALI District: Sacramento

James Marchese






CALI Member since: 03/07/2016

Andy Marcoux



Andy Marcoux Investigations
Post Office Box 2356
Dublin CA 94568

Website: http://

PI/PPO License Number: WA/4265



CALI Member since: 01/13/2018
CALI District: None

Dave Markss



Pinnacle Investigations
P.O. Box 8
Colusa CA 95932
United States

Phone: 530-424-8804
Cell Phone: (530) 635-3239
Website: http://

PI/PPO License Number: 28498

Specialties: Criminal Investigations, Defense, Trial Preparation


CALI Member since: 03/31/2014
CALI District: Sacramento

Jessica Marquez



WatchTower Investigative Agency
P. O. Box 117
Turlock CA 95381

Cell Phone: 619-807-2592


Specialties: Covert Video, Criminal Investigations, Domestic, Insurance, Process Service, Social Media, Surveillance, Workers' Comp


CALI Member since: 02/05/2018
CALI District: San Joaquin South

Michael Martin



Michael J. Martin Investigations
P.O. Box 81
Plymouth CA 95669
United States

Phone: (209) 273-9318
Cell Phone: (209) 419-1044

PI/PPO License Number: PI15112

Specialties: Accident Reconstruction, Civil Investigations, Criminal Investigations, Defense


CALI District: Sacramento

Rene Martin



Rene Martin Investigations
6919 W Browning Ave.
Fresno CA 93723
United States

Phone: 559-277-1076
Website: http://

PI/PPO License Number: 25513

Specialties: Background Investigations


CALI Member since: 06/07/2014
CALI District: San Joaquin South

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