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
2Roles 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

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Connections

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

CLEAN HARBORS INC

Open CLEAN HARBORS INC profile →

Director at CLEAN HARBORS INC

2014-01-01 → End not stated

current · source reported

Observed: 2026-09-13

CLEAN HARBORS INCCLEAN HARBORS INCJohn R. Welch

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

Relationship map

Connected through the public record

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Direct public links only

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

Experience

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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 FilingCLH DEF 14A director slateSupports AI and ML experience, Board role, Committee assignments, Executive company, Executive title, Cybersecurity experience, Technology background.Open source

Basis

Identifiers, sources, dates and record limitations.

Identifiers

Alpha ID
alpha:person:john-r-welch
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 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 11, 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 · Source reportedServes on the board of Clean Harbors IncSupported by 2 public records1 source
Verification
Source reported
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board role · Source reportedBoard role: Director1 source
Verification
Source reported
Confidence
92%
Last reviewed
May 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 11, 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: Compensation, ESG1 source
Verification
Source reported
Confidence
88%
Last reviewed
May 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 11, 2026

Cybersecurity experience · Source reportedCybersecurity experience reported in filings1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 11, 2026

Executive company · Source reportedExecutive at Bridge Growth Partners, LLC1 source
Verification
Source reported
Confidence
85%
Last reviewed
May 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 11, 2026

Executive title · Source reportedExecutive title: Executive Partner1 source
Verification
Source reported
Confidence
85%
Last reviewed
May 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 11, 2026

Technology background · Source reportedTechnology background: not identified in the cited filing1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 11, 2026

View all sources3 records
  1. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 11, 2026

    Supports: AI and ML experience · Board role · Committee assignments · Executive company · Executive title · 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. https://www.sec.gov/Archives/edgar/data/822818/000082281826000013/clh-20260410.htm

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

    Supports: Director at CLEAN HARBORS INC (NYSE: CLH)