G. Michael Sievert

Alpha governed public record. Unknown, unavailable, and unpublished values are never inferred as zero.

Record

Field	Value
Representation	alpha-profile-markdown-v3
Protocol	Alpha Governance Facts Protocol 0.1
Schema	alpha.governance.entity.public.v1
Record version	public-0
Canonical entity	alpha:person:g-michael-sievert
Entity type	Person
Canonical URL	https://registry.alpha.ac/people/g-michael-sievert
Publication	PUBLISHED
Verification	corroborated
Verification schema	alpha-verification-states-v1
Ownership	unclaimed
Published claims	16
Claims under review	0
Evidence records	8
Conflicts	0
Conflicts in internal review	1
Observed	2026-09-24T21:59:37.159305+00:00
Last reviewed	2026-05-16T09:12:15.559+00:00

Identity

Legal name: G. Michael Sievert
Display name: G. Michael Sievert

Leadership

PUBLISHED

Roles

Director at T-Mobile US. Valid from: 2020-01-01. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:5.

Governance

PUBLISHED

Board committees

PUBLISHED

AI and ML experience

AI and ML experience: not identified in the cited filing. Publication: PUBLISHED. Verification: corroborated. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:1, alpha:evidence:person:g-michael-sievert:2.

AI expertise

AI expertise: not identified in the cited filing. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:7.

AI governance relevance

AI governance relevance reported from role and filings. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:7.

Board independence

Not independent (executive director). Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:6.

Board membership

Serves on the board of T-Mobile US, Inc.. Valid from: 2018-01-01. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: corroborated. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:6, alpha:evidence:person:g-michael-sievert:8.

Board role

Board role: Vice Chair. Valid from: 2026-04-27. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:1.

Committee assignments

Committee assignments: Transaction. Valid from: 2026-04-27. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:1.

Cybersecurity experience

Cybersecurity experience: not identified in the cited filing. Publication: PUBLISHED. Verification: corroborated. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:1, alpha:evidence:person:g-michael-sievert:2.

Executive company

Executive at T-Mobile US, Inc.. Valid from: 2026-04-27. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: corroborated. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:1, alpha:evidence:person:g-michael-sievert:3, alpha:evidence:person:g-michael-sievert:4, alpha:evidence:person:g-michael-sievert:2, alpha:evidence:person:g-michael-sievert:7.

Executive function

Enterprise Leadership (CEO). Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:7.

Executive title

Executive title: President and Chief Executive Officer. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:7.
Executive title: Vice Chairman. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:1.
Executive title: Vice Chairman; Former President and Chief Executive Officer. Valid from: 2026-04-27. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: corroborated. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:4, alpha:evidence:person:g-michael-sievert:3, alpha:evidence:person:g-michael-sievert:2.

Technology background

Technology background: not identified in the cited filing. Publication: PUBLISHED. Verification: source_reported. Review: internal_review. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:2.
Technology background reported in filings. Publication: PUBLISHED. Verification: source_reported. Review: internal_review. Assertion: source_reported. Evidence: alpha:evidence:person:g-michael-sievert:1.

Coverage states

Field	Value
Identity	PUBLISHED
Business	NOT_APPLICABLE
Leadership	PUBLISHED
Board and committees	PUBLISHED
Governance	PUBLISHED
Financials	NOT_APPLICABLE
Workforce	NOT_APPLICABLE
Ownership	NOT_APPLICABLE
Ratings	NOT_PUBLISHED
Market and index context	NOT_APPLICABLE

Public sources

alpha:evidence:person:g-michael-sievert:1: TMUS DEF 14A director slate.
alpha:evidence:person:g-michael-sievert:2: TMUSZ DEF 14A executive officers.
alpha:evidence:person:g-michael-sievert:3: TMUSL DEF 14A executive officers.
alpha:evidence:person:g-michael-sievert:4: TMUSI DEF 14A executive officers.
alpha:evidence:person:g-michael-sievert:5: sec_proxy.
alpha:evidence:person:g-michael-sievert:6: T-Mobile US, Inc. director board source.
alpha:evidence:person:g-michael-sievert:7: TMUS executive roster source.
alpha:evidence:person:g-michael-sievert:8: public_source.

Rights

Field	Value
public_retrieval	allowed
agent_retrieval	allowed
redistribution	not_granted
model_training	not_granted
commercial_use	not_specified
relationship_pathfinding	not_granted
direct_contact	not_granted

Limitations

Only permissioned public claims and evidence are included.
Absence of a claim is not evidence that the underlying fact is false.
Public retrieval does not grant model-training or redistribution rights.
Private relationships and Council activity are excluded.

Alternate representations

Canonical profile
Public Markdown
Public JSON
JSON-LD
MCP resource: alpha://people/g-michael-sievert at https://mcp.alpha.ac/mcp

Connected governance records

Structured intelligence is not currently available. Existing published profile evidence remains accessible.