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

Professional narrative

About

Served as Co-Chief Operating Officer of SEACOR Holdings since February 2015 and President of SEACOR Holdings Offshore Marine Services segment since July 2005. Joined SEACOR Holdings in June 1992 and held various financial, analytical, chartering and marketing roles. Graduated from Harvard College.

Sources are shown with the information they support.

Current roles

Appointments & responsibilities

Executive appointments

Board appointments

Governance

Board appointments, committee responsibilities and disclosed relationships.

Board and advisory record

Board service

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

President, Chief Executive Officer and Director

SEACOR Marine Holdings Inc.

Current · start date not disclosed

Confirmed by public sourceView source

Connections

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

SEACOR Marine Holdings Inc.

Open SEACOR Marine Holdings Inc. profile →

President and Chief Executive Officer at SEACOR Marine Holdings Inc.

Start not stated → End not stated

current · source reported

Observed: 2026-09-16

President, Chief Executive Officer and Director at SEACOR Marine Holdings Inc.

Start not stated → End not stated

current · source reported

Observed: 2026-09-16

SEACOR Marine Hold…SEACOR Marine Holdings Inc.John Gellert

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 Def 14aPublic profile sourceSupports President and Chief Executive Officer at SEACOR Marine Holdings Inc. (NYSE: SMHI), President, Chief Executive Officer and Director at SEACOR Marine Holdings Inc. (NYSE: SMHI), Executive title.Open sourceSource 2 · Sec FilingSMHI 10-K executive officersSupports AI and ML experience, Cybersecurity experience, Executive company, Executive title, Other Company Role, Technology background.Open source

Basis

Identifiers, sources, dates and record limitations.

Identifiers

Alpha ID
alpha:person:john-gellert
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 membership · Source reportedServes on the board of SEACOR Marine Holdings Inc.1 source
Verification
Source reported
Confidence
Not stated
Last reviewed
Not stated
Cybersecurity experience · Source reportedCybersecurity 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

Executive company · Source reportedExecutive at SEACOR Marine Holdings Inc.1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Executive title · Source reportedExecutive title: President and Chief Executive Officer1 source
Verification
Source reported
Confidence
95%
Last reviewed
Sep 13, 2026
Executive title · Source reportedExecutive title: President, Chief Executive Officer and a director of SEACOR Marine1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Other Company Role · Source reportedJohn Gellert is also linked to Multiple industry organizations as Member of the Executive Committee of International Support Vessel Owners Association; Member of the board of directors of Offshore Marine Service Association; Former chairman of National Ocean Industries Association; Member of the Executive Council at Cohesive Capital Management, L.P..1 source
Verification
Source reported
Confidence
70%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Technology background · Source reportedTechnology background: 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

View all sources3 records
  1. https://www.sec.gov/Archives/edgar/data/1690334/000119312526159284/d891931ddef14a.htm

    Sec Def 14a · Tier not stated · Reviewed Sep 13, 2026

    Supports: President and Chief Executive Officer at SEACOR Marine Holdings Inc. (NYSE: SMHI) · President, Chief Executive Officer and Director at SEACOR Marine Holdings Inc. (NYSE: SMHI) · Executive title

  2. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

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

  3. https://www.sec.gov/Archives/edgar/data/1690334/000119312526159284/d891931ddef14a.htm

    Public Source · Tier not stated · Reviewed Not stated

    Supports: Board membership