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
2Roles supported by the sources cited on this profile
Qualifications
Not establishedNo qualification is currently confirmed by the cited sources

Professional narrative

About

Mr. Vondran is the President and CEO of American Tower Corporation, having joined the Company in 2000 as part of its corporate legal team. He held various roles including Senior Vice President, U.S. Leasing Operations, General Counsel U.S. Tower Division, President U.S. Tower Division, and most recently Executive Vice President and Chief Operating Officer. Prior to American Tower, he was an associate at Lewellen & Frazier LLP and served as a telecommunications consultant.

Sources are shown with the information they support.

Current roles

Appointments & responsibilities

Board appointments

Director

Ameren (NYSE: AEE)

Jan 1, 2025 – Present

Independence: Not stated

Source effective: 2025-01-01 · Observed: 2026-05-03T01:47:43.848553+00:00

confirmedView source

Governance

Board appointments, committee responsibilities and disclosed relationships.

Board and advisory record

Board service

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

Director

Ameren

2025-01-01 · current

Confirmed by public sourceView source

Director

American Tower

2024-01-01 · current

Confirmed by public sourceView source

Connections

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

Ameren

Open Ameren profile →

Director at Ameren

2025-01-01 → End not stated

current · source reported

Observed: 2026-09-21

AmerenAmerenAmerican TowerAmerican TowerSteven O. Vondran

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 FilingAMT DEF 14A director slateSupports AI and ML experience, Board role, Committee assignments, Executive company, Executive title, Cybersecurity experience, Technology background.Open sourceSource 2 · Sec FilingAEE DEF 14A director slateSupports Board role, Committee assignments.Open sourceSource 3 · Sec FilingAMT 10-K executive officersSupports AI and ML experience, Cybersecurity experience, Executive company, Executive title, Other Company Role, Technology background.Open sourceSource 4 · Sec FilingAmerican Tower Corporation director board sourceSupports Board membership, Director since, Board independence.Open sourceSource 5 · Sec FilingAmeren Corporation director board sourceSupports Board membership, Director since, Board independence.Open source

Basis

Identifiers, sources, dates and record limitations.

Identifiers

Alpha ID
alpha:person:steven-o-vondran
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 · CorroboratedAI and ML experience: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 14, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

AI expertise · Source reportedAI expertise reported in filings1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

AI governance relevance · Source reportedAI governance relevance reported from role and filings1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board independence · Under reviewNot independent (executive director)1 source
Verification
Under review
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board independence · Under reviewIndependent director1 source
Verification
Under review
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board membership · CorroboratedServes on the board of Ameren CorporationSupported by 4 public records3 sources
Verification
Corroborated
Confidence
95%
Last reviewed
May 3, 2026
Board membership · CorroboratedServes on the board of American Tower CorporationSupported by 4 public records3 sources
Verification
Corroborated
Confidence
95%
Last reviewed
May 3, 2026
Board role · CorroboratedBoard role: DirectorSupported by 2 public records2 sources
Verification
Corroborated
Confidence
92%
Last reviewed
May 14, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 13, 2026

Committee assignments · Source reportedNo committee assignment disclosed in the cited filing1 source
Verification
Source reported
Confidence
88%
Last reviewed
May 14, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

Committee assignments · Source reportedCommittee assignments: Finance, Nuclear, Operations and Environmental Sustainability1 source
Verification
Source reported
Confidence
88%
Last reviewed
May 13, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 13, 2026

Cybersecurity experience · CorroboratedCybersecurity experience: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 14, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

Executive company · CorroboratedExecutive at American Tower CorporationSupported by 3 public records3 sources
Verification
Corroborated
Confidence
94%
Last reviewed
May 14, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Executive function · Source reportedEnterprise Leadership (CEO)1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Executive title · Source reportedExecutive title: President and CEO1 source
Verification
Source reported
Confidence
85%
Last reviewed
May 14, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

Executive title · CorroboratedExecutive title: President and Chief Executive OfficerSupported by 2 public records2 sources
Verification
Corroborated
Confidence
94%
Last reviewed
May 14, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Other Company Role · Source reportedSteven O. Vondran is also linked to Ameren Corporation as Board of Directors Member.1 source
Verification
Source reported
Confidence
70%
Last reviewed
May 14, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

Technology background · CorroboratedTechnology background: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 14, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

View all sources10 records
  1. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

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

  2. https://www.sec.gov/Archives/edgar/data/1053507/000105350726000088/amt-20260406.htm

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

    Supports: Director at American Tower (NYSE: AMT)

  3. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 13, 2026

    Supports: Board role · Committee assignments

  4. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 14, 2026

    Supports: AI and ML experience · Cybersecurity experience · Executive company · Executive title · Other Company Role · Technology background

  5. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: Board membership · Director since · Board independence

  6. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: Board membership · Director since · Board independence

  7. https://www.sec.gov/Archives/edgar/data/1002910/000110465925027821/tm252331-3_def14a.htm

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

    Supports: Director at Ameren (NYSE: AEE)

  8. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: AI expertise · AI governance relevance · Executive company · Executive function · Executive title

  9. https://www.sec.gov/Archives/edgar/data/1002910/000110465925027821/tm252331-3_def14a.htm

    Public Source · Tier not stated · Reviewed Not stated

    Supports: Board membership

  10. https://www.sec.gov/Archives/edgar/data/1053507/000105350726000088/amt-20260406.htm

    Public Source · Tier not stated · Reviewed Not stated

    Supports: Board membership