Douglas Dziak is named as a lobbyist on federal disclosure filings for 14 clients through Invariant LLC. The most recent filing naming them posted in October 2026. Issues reported include Energy/Nuclear, Environment/Superfund, Taxation/Internal Revenue Code and Trade (domestic/foreign).
Filers must list covered executive or legislative branch positions held. As filed:
| Client | Registrant | Latest | Issues |
|---|---|---|---|
| HUDSON TECHNOLOGIES | INVARIANT LLC | Q3 2026 | Trade (domestic/foreign), Environment/Superfund |
| GLASSMAN ENTERPRISES, LLC ON BEHALF OF THE COALITION FOR GREEN CAPITAL | INVARIANT LLC | Q3 2026 | Energy/Nuclear |
| KARPOWERSHIP UK LIMITED | INVARIANT LLC | Q3 2026 | Energy/Nuclear |
| AVANTUS LLC | INVARIANT LLC | Q3 2026 | Taxation/Internal Revenue Code, Energy/Nuclear |
| ECOLAB | INVARIANT LLC | Q3 2026 | Trade (domestic/foreign), Environment/Superfund, Taxation/Internal Revenue Code |
| NATIONAL GRID USA SERVICE COMPANY, INC. | INVARIANT LLC | Q3 2026 | Energy/Nuclear |
| WYOMING RARE (USA) INC. ON BEHALF OF ARE MANAGEMENT LLC | INVARIANT LLC | Q3 2026 | Defense, Energy/Nuclear |
| STRATA ENERGY, INC. | INVARIANT LLC | Q3 2026 | Energy/Nuclear |
| WASHINGTON GAS | INVARIANT LLC | Q3 2026 | Energy/Nuclear |
| CARRIER CORPORATION | INVARIANT LLC | Q3 2026 | Taxation/Internal Revenue Code, Energy/Nuclear, Environment/Superfund |
| GEOTHERMAL EXCHANGE ORGANIZATION | INVARIANT LLC | Q3 2026 | Taxation/Internal Revenue Code, Energy/Nuclear |
| URANIUM PRODUCERS OF AMERICA | INVARIANT LLC | Q3 2026 | Defense, Energy/Nuclear |
| RECYCLING LEADERSHIP COUNCIL | INVARIANT LLC | Q1 2026 | Waste (hazardous/solid/interstate/nuclear), Food Industry (safety, labeling, etc.), Consumer Issues/Safety/Products |
| HEARTLAND WATER TECHNOLOGY, INC. | INVARIANT LLC | Q1 2026 | Environment/Superfund |
| Year | Clients | Registrants |
|---|---|---|
| 2026 | 14 | 1 |
| 2025 | 11 | 1 |
| Year | Items | Total |
|---|---|---|
| 2026 | 6 | $3K |
Pay is not disclosed for individual lobbyists. Filings do not confirm that records with the same name are one person, so this page may combine people who share the name Douglas Dziak. See the Capitol Clarity rankings and method.