City and County of San Francisco, District Attorney – California

District Attorney’s Investigator

Appointment Type: This is an exempt appointment. Pursuant to the City & County of San Francisco Charter, Section 10.104.13, any person occupying a position under exempt appointment shall not be subject to civil service selection, appointment and removal procedures. Exempt employees shall serve at the discretion of the appointing officer.

Department Background

The mission of the San Francisco District Attorney’s Office is to investigate, charge, and prosecute all criminal violations of law occurring within San Francisco County, on behalf of the people of the State of California, and to provide support services to victims of crime.

Within the Criminal Division, the Crime Strategies Unit (CSU) is a multidisciplinary team of neighborhood prosecutors, analysts and investigators designed to conceive, develop, and implement innovative strategies and programs that improve public safety through the efficient prevention, investigation, and prosecution of crime.

Position Description

As a member of CSU, this District Attorney Investigator will assist prosecutors in preparing and organizing cases for court, including locating and interacting with parties pertinent to cases and organizing evidence for presentation at trial. Additionally, Investigators assist various local, state and federal law enforcement agencies to ensure thorough investigations are conducted. Essential duties include but are not limited to:

  • Participates in a variety of criminal investigations; interview witnesses and other individuals knowledgeable about cases; analyzes records and accounts; collects, compiles and provides for preservation and analyses of information.
  • Perform data extraction and imaging from mobile digital devices and other types of digital devices using industry standard extraction tools and methodologies.
  • Perform analysis of mobile digital device data, including call detail records.
  • Prepare clear and concise reports that demonstrate analytical procedures follow scientific methodology and can be reproduced.
  • Prepare and present clearly written technical reports, memos, and presentations documenting investigative findings.
  • Provide expert testimony in court articulating advanced concepts pertaining to digital multimedia evidence and analysis.
  • Support acquisition and maintenance of digital evidence software and equipment.
  • Provide investigative support to prosecutors.
  • Perform other related duties, as assigned.

Knowledge, Experience and Skills Preferred

  • Certification in a digital forensics discipline through an international association (e.g., LEVA, IAI, IACIS).
  • Knowledge of best practices and guidelines for processing digital evidence, such as mobile device operating file systems, call detail records, and geo-location data.
  • Knowledge of geo-spatial analysis applications such as ArcGIS or Google Earth, and ability to perform complex spatial analysis and produce clear informative maps representing results.
  • Knowledge of digital encryption and decryption techniques.
  • Advanced knowledge of Word, Excel, and PowerPoint.
  • Experience with digital evidence technology and processing tools and software, including Cellebrite, Visio, Photoshop, CellHawk and PenLink.
  • Experience using law enforcement investigative databases and resources.
  • Communicate effectively verbally and in writing.
  • Perform analysis, interpret data and develop conclusions.
  • Interpret and apply Federal, State and local policies, laws and regulations.
  • Establish and maintain effective working relationships in a collaborative environment.

Minimum Qualifications

1) Requires a combination of education at the collegiate level in criminology, penology, police science or a closely related field and responsible criminal investigative experience totaling six years; AND
2) Possession of a valid California Class C driver’s license.

Highly Desirable Qualification:

Certification in a digital forensics discipline through an international association (e.g., LEVA, IAI, IACIS).*The desirable qualification will be considered in addition to the requirement to meet the minimum qualifications.


Security clearance is required as a condition of employment. Candidates for employment with the District Attorney’s Office are required to undergo a background investigation to determine suitability for employment in the classification and department. Failure to maintain security clearance may be the basis for termination from employment with the District Attorney’s Office.

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