Profile

Identity, professional record and current appointments.

Overview

Professional record at a glance

A concise summary of information supported by the cited public sources. Missing information is treated as unknown, not as a negative finding.

Current roles
11 current organization shown on this profile
Board positions
11 supported by public sources, 0 supplied by the profile owner
Committee roles
4Roles supported by the sources cited on this profile
Qualifications
Not establishedNo qualification is currently confirmed by the cited sources

Professional narrative

About

Retired Senior Vice President and Chief Financial Officer of E.I. du Pont de Nemours and Company in 2006 after joining DuPont in 1974. Has extensive executive experience in capital markets, corporate finance, accounting, international operations and strategic planning with a multinational corporation operating in complex industries.

Sources are shown with the information they support.

Current roles

Appointments & responsibilities

Board appointments

Governance

Board appointments, committee responsibilities and disclosed relationships.

Committee appointments across companies

Structured records are unavailable. This does not establish that no records exist.

Board and advisory record

Board service

Sources are shown with each role, education record, or credential.

Director

Quest Diagnostics

Current · start date not disclosed

Confirmed by public sourceView source

Connections

Explore the roles, education and affiliations published in this record.

Quest Diagnostics

Open Quest Diagnostics profile →

Director at Quest Diagnostics

Start not stated → End not stated

current · source reported

Observed: 2026-09-24

Quest DiagnosticsQuest DiagnosticsGary M. Pfeiffer

Dashed lines mark past roles. Select a connection to see its dates and sources.

Relationship map

Connected through the public record

Direct relationships from verified facts and published résumé records. Private connections are excluded.

Direct public links only

Only published affiliations are shown here. Private relationships require authorized access.

Experience

Career history, education, credentials and public contributions.

Published record

Featured coverage

Selected publications and public sources used to establish this profile. Inclusion records provenance; it is not an endorsement.

Source 1 · Sec FilingDGX DEF 14A director slateSupports AI and ML experience, Board role, Committee assignments, Cybersecurity experience, Technology background.Open sourceSource 2 · Sec FilingQuest Diagnostics Incorporated director board sourceSupports Board membership, Board independence.Open source

Basis

Identifiers, sources, dates and record limitations.

Identifiers

Alpha ID
alpha:person:gary-m-pfeiffer
Record version
public-0

Published evidence records

4 evidence records, matching Agent View. Records may refer to different locations or observations in the same document. This count is not a count of independent corroborating sources.

  1. DGX DEF 14A director slate

    sec filing · Source published: Apr 6, 2026 · Retrieved: May 16, 2026

    Supports 5 claims
    • AI and ML experience: AI and ML experience: not identified in the cited filing · Claim reviewed: May 16, 2026
    • Board role: Board role: Director · Claim reviewed: May 16, 2026
    • Committee assignments: Committee assignments: Audit and Finance Committee, Compensation and Leadership Development Committee, Executive Committee, Governance Committee · Claim reviewed: May 16, 2026
    • Cybersecurity experience: Cybersecurity experience reported in filings · Claim reviewed: May 16, 2026
    • Technology background: Technology background reported in filings · Claim reviewed: May 16, 2026

  2. Quest Diagnostics Incorporated director board source

    sec filing · Source published: Apr 4, 2025 · Retrieved: May 3, 2026

    Supports 2 claims
    • Board independence: Independent director · Claim reviewed: May 3, 2026
    • Board membership: Serves on the board of Quest Diagnostics Incorporated · Claim reviewed: May 3, 2026

  3. Open source

    sec filing · Source published: Apr 4, 2025 · Retrieved: May 3, 2026

    Supports 1 claim
    • Professional Role: Director at Quest Diagnostics · Claim reviewed: May 16, 2026

  4. Open source

    public source · Source published: Date unavailable · Retrieved: Date unavailable

    Supports 1 claim
    • Board membership: Serves on the board of Quest Diagnostics Incorporated · Claim reviewed: May 3, 2026

Sources

Sources and published information

Each item links to the public source used to support it. When sources disagree, the item is clearly marked for review.

AI and ML experience · Source reportedAI and ML experience: not identified in the cited filing1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Board independence · Source reportedIndependent director1 source
Verification
Source reported
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board membership · CorroboratedServes on the board of Quest Diagnostics IncorporatedSupported by 2 public records2 sources
Verification
Corroborated
Confidence
95%
Last reviewed
May 3, 2026
Board role · Source reportedBoard role: Director1 source
Verification
Source reported
Confidence
92%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Committee assignments · Source reportedCommittee assignments: Audit and Finance Committee, Compensation and Leadership Development Committee, Executive Committee, Governance Committee1 source
Verification
Source reported
Confidence
88%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Cybersecurity experience · Source reportedCybersecurity experience reported in filings1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Technology background · Source reportedTechnology background reported in filings1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

View all sources4 records
  1. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

    Supports: AI and ML experience · Board role · Committee assignments · Cybersecurity experience · Technology background

  2. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: Board membership · Board independence

  3. https://www.sec.gov/Archives/edgar/data/0001022079/000093041325001171/c111937_def14a-ixbrl.htm

    Sec Filing · Tier not stated · Reviewed May 3, 2026

    Supports: Director at Quest Diagnostics (NYSE: DGX)

  4. https://www.sec.gov/Archives/edgar/data/0001022079/000093041325001171/c111937_def14a-ixbrl.htm

    Public Source · Tier not stated · Reviewed Not stated

    Supports: Board membership