Sr Transmission Engineer/Principal Engineer

Repsol is a globally integrated multi-energy company headquartered in Madrid, Spain. With a team of over 25,000 employees across more than 20 countries, we serve 24 million customers worldwide. Our diversified renewable energy portfolio includes nearly 6 GW of installed capacity, with a strong presence in Spain, the United States, Italy, and Chile. As part of our commitment to a sustainable future, low-emissions generation is central to our strategy to achieve net-zero emissions by 2050. Repsol Renewables North America (RRNA) aims to increase generation capacity to more than 4.5 GW of renewable energy in North America by 2029.

About the role

This role focuses on power systems modeling and energy market analysis to support project development and transmission planning. You will perform production cost modeling and grid studies to assess congestion, curtailment, and interconnection risks, as well as develop powerflow, dynamic, and PSCAD models. The position involves conducting interconnection, deliverability, and contingency analyses, reviewing study results to identify risks and cost drivers, and recommending strategies to reduce network upgrade expenses. You will also support strategic growth by analyzing transmission capacity, reviewing regional transmission plans, and leveraging interconnection queue data and utility forecasts to identify development opportunities.

Responsibilities

• Perform PROMOD and market production cost analysis to quantify basis, curtailment, and congestion risk assessment.
• Support the transmission and interconnection team by creating plant-specific powerflow, dynamic, and PSCAD models for various regions based on interconnection requirements.
• Perform and review generation interconnection analysis, deliverability analysis, and contingency analysis using tools such as TARA, PSSE, and PowerWorld.
• Review interconnection study results, quantify risks, and identify opportunities to reduce network upgrade cost exposure during interconnection queue studies.
• Review transmission plans for various regions and ensure powerflow models are up to date for internal analysis to support the company’s strategic growth.
• Conduct screening and identify transmission capacity across areas of interest for high-quality development locations (greenfield development).
• Gather data and intelligence from interconnection queues and utility IRPs to develop scenarios.
• Use Python to automate modeling, processing large datasets, and managing inputs and outputs for various study processes.
• Prepare high-quality model reports, presentations, documentation, and market data to support project development efforts.
• Communicate technical issues effectively to non-technical audiences and higher management.

Requirements

• Bachelor’s degree or higher in electrical engineering or a related quantitative discipline.
• Minimum 4 years of experience in one or more of the following:
  • Economic modeling and/or energy market data analysis with PROMOD, PLEXOS, PROBE, or UPLAN.
  • Powerflow analysis (NERC TPL assessment and/or reliability analysis), generation interconnection studies, or power system dynamic simulations with TARA, PSSE, PowerWorld, or PSAT/TSAT.
• Experience with Excel and MS Office Suite.
• Demonstrated competency in modeling, statistical analysis, and/or optimization software is strongly desired.
• Experience working with Transmission Service Providers (including ISOs/RTOs), thorough knowledge of FERC transmission tariffs, NERC standards, and interconnection processes.
• Proficiency with Python.
• Working knowledge of interconnection procedures in MISO, PJM, SPP, CAISO, and/or ERCOT.
• Must be authorized to work for any US employer without the need for work visa sponsorship now or in the future.

Skills

• Ability to perform detailed technical analysis, synthesize results, and automate repeatable processes.
• Strong motivation to succeed in a fast-paced, collaborative environment.
• Excellent communication skills, with the ability to convey technical issues to non-technical audiences and higher management.