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 strategies and long-term service considerations

Govern selection and integration of:

Heat Recovery Steam Generators (HRSGs)

Steam turbines (where applicable)

Compressors, pumps, fans, and major auxiliaries

 

Balance of Plant (BOP) & Thermal Systems

Own mechanical scope for plant BOP systems, including:

Fuel gas systems

Cooling systems (air-cooled, water-cooled, hybrid)

Lube oil, seal oil, and auxiliary fluid systems

Compressed air and utility systems

Below ground and above ground piping

Ensure thermal and mechanical designs support:

High ambient operation

Frequent start-stop and load-following duty

Long-term reliability and maintainability

Heavy Civil/Structural design and construction support:

Heavy industrial concrete foundations

Steel structures

Earthwork and Soil stabilization

EPC, OEM & Owner’s Engineer Governance

Lead engagement with:

EPC contractors

OEMs (GT, engine, HRSG, major equipment suppliers)

Owner’s Engineers (OE)

Review, challenge, and approve key deliverables, including:

Mechanical & piping design criteria and specifications

Equipment datasheets and technical bids

P&IDs, layouts, and equipment arrangements

Stress, vibration, and fatigue-related analyses

Civil structures, foundations & earthwork

Ensure EPC and OEM designs align with owner objectives for reliability, operability, and lifecycle cost.

 

Project Development, Risk & Due Diligence

Provide mechanical engineering leadership during:

Pre-FEED and FEED decision gates

Project acquisitions and technical due diligence

Identify mechanical-system-related risks affecting:

Availability and forced outage rates

CAPEX and OPEX

Schedule, constructability, and commissioning

Support mitigation strategies and owner positions in commercial and technical negotiations.

 

Plant Performance, Availability & Lifecycle Optimization

Ensure mechanical systems support high availability targets (e.g., 99.9%+ where applicable).

Oversee evaluation of:

Mechanical bottlenecks and single points of failure

Maintenance intervals and outage strategies

Spare parts philosophy and long-lead items

Drive continuous improvement of plant design based on operating experience.

 

Technology Strategy & Future Readiness

Define long-term mechanical strategy to support:

Future SCGT → CCGT conversion

Carbon capture readiness (where applicable)

Evaluate emerging technologies and equipment from an owner’s perspective, balancing innovation with bankability.

 

Leadership & Cross-Functional Alignment

Provide technical direction and mentorship to senior and staff-level mechanical engineers.

Coordinate closely with:

Electrical and Controls engineering leadership

Development, commercial, environmental, regulatory and operations teams

Translate complex mechanical issues into clear, actionable recommendations for executive leadership.

 

REQUIRED QUALIFICATIONS

Bachelor’s degree in Mechanical Engineering, or Industrial Engineering.

10+ years of experience in power plant mechanical engineering, EPC, OEM, or owner-side roles.

Proven experience with gas turbine and/or gas engine power plants.

Demonstrated experience acting as a discipline lead or technical authority is strongly preferred.

Deep expertise in:

Rotating equipment and thermal systems

Gas turbines, gas engines, and HRSGs

Balance-of-plant mechanical systems

Strong understanding of:

High-temperature, high-cycle duty operation

Mechanical reliability, fatigue, and vibration

Plant availability and lifecycle cost drivers

Familiarity with applicable standards (ASME, API, ISO, OEM standards).

Ability to set mechanical engineering direction and enforce standards across multiple projects.

Strong engineering judgement balancing reliability, cost, schedule, and risk.

Confident communicator with EPCs, OEMs, and executive stakeholders.

Comfortable operating in fast-moving project development environments.

Experience supporting data center power supply projects or other high-availability applications.

Exposure to engine-based generation or hybrid plant configurations.

Experience with heavy civil/structural & piping design and construction.

Experience with hydrogen-ready or low-carbon power technologies.

Professional Engineer (PE) license.

 

COMPENSATION: $180,000 - $200,000 salary

 

Attention external recruitment firms, we will not accept any unsolicited resumes at this time. Please do not contact any internal member of our company to discuss the position or to solicit candidates.

Hanwha Energy USA provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability or genetics.

www.174powerglobal.com .