PTThe Paper Trail Project
Sourced institutional rolesLDA lobbying records

LANDON STROPKO

LANDON STROPKO appears as a registered lobbyist in federal Lobbying Disclosure Act records connected to organizations tracked by Paper Trail.

Data updated Aug 31, 2026

Source-backed chronology

Career Timeline

Dates not reported

Leg. Dir., Sen. Mike Enzi (2017-2018); Rep. Cynthia Lummis (2009-2016): Chief of Staff (DC), Leg. Dir., Sr. Leg. Asst, Leg. Asst; Rep. Barbara Cubin (2003-2008): Sr. Leg. Asst, Leg. Asst, Leg. Aide, Leg. Correspondent, Intern

Federal government

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Documented career transitions

Revolving Door

Congress → Lobbying

Federal governmentLeg. Dir., Sen. Mike Enzi (2017-2018); Rep. Cynthia Lummis (2009-2016): Chief of Staff (DC), Leg. Dir., Sr. Leg. Asst, Leg. Asst; Rep. Barbara Cubin (2003-2008): Sr. Leg. Asst, Leg. Asst, Leg. Aide, Leg. Correspondent, Intern↓Palantir TechnologiesRegistered lobbyist

Federal LDA filings

Lobbying Activity

PALANTIR TECHNOLOGIES INC.1st Quarter (Jan 1 - Mar 31) 2022

Registrant: INVARIANT LLC · Disaster Planning/Emergencies

Highlight Palantirs capabilities to support emergency response efforts, including for the COVID-19 pandemic.

LDA filing ↗
PALANTIR TECHNOLOGIES INC.1st Quarter (Jan 1 - Mar 31) 2021

Registrant: INVARIANT LLC · Energy/Nuclear

Educate policymakers on Palantirs capabilities to support federal legacy nuclear site clean-up.

LDA filing ↗
PALANTIR TECHNOLOGIES INC.3rd Quarter (July 1 - Sep 30) 2021

Registrant: INVARIANT LLC · Disaster Planning/Emergencies

Highlight Palantirs capabilities to support emergency response efforts, including for the COVID-19 pandemic.

LDA filing ↗
PALANTIR TECHNOLOGIES INC.1st Quarter (Jan 1 - Mar 31) 2021

Registrant: INVARIANT LLC · Disaster Planning/Emergencies

Educate policymakers on Palantirs capabilities to support emergency response efforts, including for the COVID-19 pandemic.

LDA filing ↗
PALANTIR TECHNOLOGIES INC.2nd Quarter (Apr 1 - June 30) 2021

Registrant: INVARIANT LLC · Disaster Planning/Emergencies

Educate policymakers on Palantirs capabilities to support emergency response efforts, including for the COVID-19 pandemic.

LDA filing ↗
PALANTIR TECHNOLOGIES INC.4th Quarter (Oct 1 - Dec 31) 2021

Registrant: INVARIANT LLC · Disaster Planning/Emergencies

Highlight Palantirs capabilities to support emergency response efforts, including for the COVID-19 pandemic.

LDA filing ↗
PALANTIR TECHNOLOGIES INC.2nd Quarter (Apr 1 - June 30) 2021

Registrant: INVARIANT LLC · Energy/Nuclear

Educate policymakers on Palantirs capabilities to support federal legacy nuclear site clean-up; discuss use of data to inform clean energy and climate policies.

LDA filing ↗
Primary Source ↗