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
22 current organizations shown on this profile
Board positions
22 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

Alpha has not published a narrative summary because the current public source set is not sufficient.

Current roles

Appointments & responsibilities

Board appointments

Governance

Board appointments, committee responsibilities and disclosed relationships.

Connections

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

International Business Machines Corporation

Open International Business Machines Corporation profile →

Director at International Business Machines Corporation

2023-01-01 → End not stated

current · source reported

Observed: 2026-09-12

International Busi…International Business Machines CorporationNorthrop GrummanNorthrop GrummanMarianne C. Brown

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 FilingSCHW DEF 14A director slateSupports AI and ML experience, Board role, Committee assignments, Cybersecurity experience, Technology background.Open sourceSource 2 · Sec FilingNorthrop Grumman Corporation director board sourceSupports Board membership, Committee assignments, Director since, Board independence.Open sourceSource 3 · Sec FilingIBM director board sourceSupports Board membership, Director since, Board independence.Open sourceSource 4 · Sec FilingNOC DEF 14A director slateSupports Board role, Committee assignments.Open source

Basis

Identifiers, sources, dates and record limitations.

Identifiers

Alpha ID
alpha:person:marianne-c-brown
Record version
public-0

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 · CorroboratedIndependent directorSupported by 2 public records2 sources
Verification
Corroborated
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board membership · CorroboratedServes on the board of IBMSupported by 3 public records2 sources
Verification
Corroborated
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board membership · CorroboratedServes on the board of Northrop Grumman CorporationSupported by 3 public records2 sources
Verification
Corroborated
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board role · CorroboratedBoard role: DirectorSupported by 3 public records3 sources
Verification
Corroborated
Confidence
92%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Apr 29, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 15, 2026

Committee assignments · Source reportedNo committee assignment disclosed in the cited filing1 source
Verification
Source reported
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Committee assignments · Source reportedCommittee assignments: Audit and Risk, Nominating/Governance1 source
Verification
Source reported
Confidence
88%
Last reviewed
May 15, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 15, 2026

Committee assignments · Source reportedCommittee assignments: Directors and Corporate Governance1 source
Verification
Source reported
Confidence
88%
Last reviewed
Apr 29, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Apr 29, 2026

Committee assignments · Source reportedCommittee assignments: Risk1 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 sources7 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 · Committee assignments · Director since · Board independence

  3. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: Board membership · Director since · Board independence

  4. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Apr 29, 2026

    Supports: Board role · Committee assignments

  5. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 15, 2026

    Supports: Board role · Committee assignments

  6. https://www.sec.gov/Archives/edgar/data/51143/000005114326000025/ibm-20260306.htm

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

    Supports: Director at International Business Machines Corporation (NYSE: IBM)

  7. https://www.sec.gov/Archives/edgar/data/1133421/000113342126000007/noc-20260401.htm

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

    Supports: Director at Northrop Grumman (NYSE: NOC)