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Own thermal management and mechanical integration for a high-temperature nuclear power conversion system. Responsibilities include thermal budgeting, heat rejection and cold-sink architecture, recuperator sizing, insulation and instrumentation design, thermal interface management, transient analysis, testing, model correlation, component life assessment, and inspection and maintenance planning. Collaborate across mechanical, electrical, safety, and nuclear engineering teams to develop and commission first-of-a-kind hardware.

Own thermal management for a nuclear microreactor Power Conversion System, including heat budgets, heat rejection, cold-sink architecture, recuperator integration, insulation, thermal interfaces, instrumentation, and transient requirements. Perform thermal and thermo-mechanical analysis, correlate models with test data, support hardware testing and commissioning, and develop inspection and maintenance plans for life-limited components. Collaborate across mechanical, electrical, safety, nuclear, materials, and structural engineering teams.

Designs, analyzes, tests, and qualifies safety-significant reactor structures, including core restraints, control drum supports, and heat exchanger vessel supports. Performs thermal, mechanical, and structural analyses; defines architectures, margins, and operating limits; creates engineering documentation; leads testing and validation; and collaborates with manufacturing, licensing, procurement, and suppliers through hardware deployment.

The Manufacturing Engineer will develop manufacturing processes for nuclear reactor sub-systems, focusing on parts manufacturability, process qualifications, and collaboration across teams for design improvements.

Build and scale the accounting function: own month-end/quarter/annual close, ensure GAAP-compliant reporting, lead technical accounting (revenue, stock comp, leases), implement controls and ERPs, support audits/tax, develop manufacturing and government contract accounting, and partner across Finance, Engineering, and Operations.

Antares is hiring engineers passionate about clean energy. Roles involve design, testing, software development, and operations. A degree in engineering or physics is required. Preferred skills include project management and industry experience.

Lead Antares' legal and compliance functions as the first in-house General Counsel. Advise executives, manage government contracts and federal relationships, oversee nuclear regulatory and export‑controls compliance (ITAR/EAR), draft and negotiate commercial agreements, manage external counsel, build corporate governance and legal infrastructure, and provide day‑to‑day practical legal support to enable rapid execution in a high-growth, regulated environment.