Principal Mechanical Engineer

COMPANY OVERVIEW Hanwha Energy USA , headquartered in Houston, Texas, is part of the Hanwha Group—a FORTUNE Global 300 company and one of South Korea’s most respected business enterprises. With over a decade of experience delivering high-quality, utility-scale energy projects across North America, Hanwha Energy USA has evolved into a comprehensive energy solutions provider. Our portfolio now spans utility-scale renewables, natural gas generation, retail electricity, and strategic partnerships that power America’s growing data center industry. Our expertise covers the entire energy value chain—from project development and engineering to construction, operations, and maintenance. By integrating advanced technologies, proven processes, and strong partnerships, we deliver reliable, customized solutions that meet the dynamic needs of local energy markets. Hanwha Energy USA is actively advancing strategic initiatives in natural gas generation and data center development, including hyperscaler solutions on both sides of the meter. We are proud to serve as the parent company of: Hanwha Renewables – specializing in utility-scale solar and battery energy storage systems (BESS) Chariot Energy – providing retail electricity services for residential, commercial, and industrial customers in deregulated markets POSITION OVERVIEW The Principal Mechanical Engineer is accountable for the overall mechanical engineering strategy, technical governance, and lifecycle performance of utility-scale gas-fired power plants, including gas turbine– and gas reciprocating engine–based generation facilities. This role serves as the owner-side mechanical authority across the full project lifecycle—from early development and Pre-FEED through EPC execution, commissioning, and operations. The principal defines mechanical design philosophy with emphasis on heavy civil/structural, governs EPC and OEM designs, and ensures plant reliability, availability, and long-term operability, particularly for high-duty and mission-critical applications such as data center–driven power supply. This position requires a blend high-level technical expertise with a general understanding of commercial aspects, regulatory awareness, and cross functional coordination to bring utility scale power projects to life. The employee may be required to perform other job-related duties as requested by management. All duties will be assigned in accordance with applicable laws and company policies. RESPONSIBILITIES Mechanical Engineering Technical Authority (Owner-Side) Establish and own the overall mechanical engineering philosophy for gas-fired power plants (SCGT, CCGT, and reciprocating gas engine). Act as the final technical decision-maker for mechanical system design, equipment selection, and lifecycle-related issues. Define company-wide standards for: Rotating equipment and balance-of-plant (BOP) systems Redundancy, sparing philosophy, and maintainability Design margins, derating, and availability targets Plant System Engineering Design (Owner-Side) Lead plant-level system and process engineering for gas-fired power plant projects from concept through execution Develop and review key system design deliverables, including: Fuel Gas System configuration and pressure/flow control philosophy Heat & Material Balance diagrams Water Balance Diagrams for various operating scenarios Perform and validate cycle analysis for SCGT, CCGT, and gas engine plants, including: Plant efficiency, heat rate, and auxiliary power assessment Impact of ambient conditions, part-load operation, and degradation Define overall plant configuration and operating concept based on system-level trade-off studies Ensure consistency between system design assumptions and detailed mechanical/BOP design Prime Mover & Major Equipment Oversight Provide technical leadership for gas turbines and gas engines, including: Performance, efficiency, and degradation assumptions Operating envelopes and dispatch flexibility Maintenance stra…