Senior Interconnection Engineer

OCI Alabama LLC; San Antonio (TX); On-site; USD 120,000 - 180,000; Full time

Job summary

OCI Energy LLC is seeking a Senior Interconnection Engineer to lead the interconnection studies and power flow analyses for utility-scale solar and storage projects in ERCOT and beyond. Under the Director of Interconnection, you will guide technical work across development, execution, and construction phases.

The role requires strong modeling skills, coordination with utilities and ISOs, and the ability to mentor junior engineers.

Qualifications

• Bachelor’s degree in Electrical Engineering with a focus in power systems or Computer Engineering.
• 2+ years of experience in transmission planning, interconnection studies, or power market analysis.
• Hands-on experience with PowerWorld, PSSE, PLEXOS, or other power flow software.
• Ability to independently perform interconnection and transmission analyses.
• Familiarity with ERCOT and/or MISO markets preferred.
• Strong written and verbal communication skills.

Responsibilities

• Lead interconnection studies and power flow modeling for utility-scale projects.
• Coordinate with TSPs, ISOs, and internal teams across project lifecycles.
• Support preparation and submission of interconnection applications.
• Review study results and validate modeling inputs and outputs.
• Assist with interconnection agreements and technical exhibits.
• Represent OCI Energy in ISO meetings and regulatory discussions.
• Provide mentorship to junior engineers.

Skills

Power systems

Python

Communication

Power flow modeling

Education

Electrical Engineering (Power Systems)

Computer Engineering

Tools

PowerWorld

PSSE

PLEXOS

Job description

Job Description: Senior Interconnection Engineer

Reports to: Director of Interconnection

OCI Energy is an industry leading developer, owner, and operator of utility-scale solar and battery storage projects within the ERCOT market. With a rapidly expanding portfolio of projects across MISO and other key North American markets, we are seeking a highly motivated Senior Interconnection Engineer to join our dynamic team. This position offers a unique opportunity to contribute to our organization’s growth while taking a lead technical role in cutting-edge renewable energy projects.

Job Summary

Under general direction of the Director of Interconnection, the Senior Interconnection Engineer plays a critical technical role in the full lifecycle of utility-scale solar and battery storage projects. Responsibilities include leading interconnection studies, performing advanced power flow modeling and transmission analysis, supporting application strategy, and coordinating with utilities and ISOs.

The Senior Interconnection Engineer provides technical leadership across multiple projects and serves as a key resource during development, execution, and construction phases of the interconnection process.

Essential Functions

• Track, manage, and support assigned projects across all lifecycle phases, ensuring effective coordination with TSPs, ISOs, internal teams, consultants, and other stakeholders.


• Perform and lead power flow modeling, interconnection analyses, economic assessments, and utility coordination to identify optimal project locations and sizes.


• Conduct transmission analysis to evaluate constraints, congestion, curtailment risk, and basis risk.


• Review interconnection study results and validate modeling assumptions, inputs, and outputs.


• Support preparation and submission of interconnection applications and study data.


• Assist with review and negotiation of interconnection agreements, including technical exhibits and specifications.


• Lead development and technical review of single-line diagrams and interconnection facility designs.


• Develop and track schedules and milestones in coordination with the master project schedule and EPC timelines.


• Monitor engineering, procurement, construction, testing, and commissioning of interconnection facilities and lead technical coordination calls as needed.


• Represent OCI Energy in technical discussions at ISO meetings and provide internal updates on project impacts.


• Assist in generator registration with utilities, RTO/ISOs, and regulatory agencies.


• Support ISO, NERC, FERC, and other regional compliance efforts.


• Provide mentorship and technical guidance to junior engineers.

Qualifications

• Bachelor’s degree in Electrical Engineering with a focus in power systems or Computer Engineering.


• Two plus (2+) years of experience in transmission planning, interconnection studies, or power market analysis within the power industry.


• Hands-on experience with PowerWorld, PSSE, PLEXOS, or other power flow and PCM software preferred.


• Ability to independently perform interconnection and transmission analyses with limited supervision.


• Familiarity with interconnection processes, particularly within ERCOT and/or MISO markets preferred.


• Working knowledge of reliability, stability, congestion, curtailment, and LMP concepts.


• Programming experience, particularly with Python, is preferred.


• Familiarity with Battery Energy Storage Systems (BESS) is preferred.


• Strong written and verbal communication skills.


• Ability to manage multiple assignments and meet project deadlines.

OCI Energy LLC provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, marital status, amnesty, or status as a covered veteran in accordance with applicable federal, state and local laws. OCI Energy LLC complies with applicable state and local laws governing non-discrimination in employment in every location in which the company has facilities.

Qualifications

Education

Preferred

Bachelors or better in Computer Engineering.

Bachelors or better in Electrical Engineering.

Equal Opportunity Employer
This employer is required to notify all applicants of their rights pursuant to federal employment laws.For further information, please review the Know Your Rights notice from the Department of Labor.