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Sr. or Principal Engineer, Transmission Interconnection

Avantus
San Diego, California
Full Time
Posted January 20, 2026
$162k - $190k
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Job Description

The Principal Engineer, Transmission and Interconnection, is responsible for leading utility-scale solar and storage projects through interconnection processes across various markets, performing technical studies, negotiating agreements, and coordinating with utilities and ISOs to ensure timely and cost-effective project development.

Key Responsibilities

  • Lead projects through the utility-scale solar and storage interconnection process from inception to commercial operation across multiple ISO and market regions.
  • Perform power flow, stability, and short circuit studies using specialized software for project prospecting and analysis.
  • Evaluate transmission interconnection tariffs, costs, timelines, and processes to develop strategic approaches for projects.
  • Coordinate and manage all interconnection requirements, including applications, studies, agreements, and milestone tracking.
  • Negotiate interconnection study results and agreements with utilities to achieve favorable project outcomes.
  • Build and maintain relationships with utilities, ISOs, and regulators, tracking progress to ensure timely project completion.
  • Identify optimal interconnection locations through power flow and market risk analyses, considering cross-functional criteria.
  • Monitor changes in tariffs, business practices, and transmission upgrades relevant to target markets.
  • Collaborate with cross-functional teams to meet interconnection milestones and ensure project development aligns with technical and legal requirements.

Requirements

  • Ten 10 years minimum of related experience in interconnection project development or transmission planning at a utility, ISO RTO, or project developer.
  • Deep understanding of CAISO WECC utilities tariffs, interconnection processes, transmission service processes, transmission planning processes, and late-stage resource implementation processes.
  • Demonstrated ability to work autonomously at a dynamic pace, find creative solutions, track major milestones, and prioritize several projects simultaneously.
  • Ability to provide verbal and written summaries of interconnection processes, results, milestones, and statuses for both a technical and non-technical audience.
  • Ability to read and negotiate long legal contracts including Interconnection Agreements, Power Purchase Agreements, Independent Engineer Reports, and Financing Documents.
  • Experience developing lasting relationships with utilities, consulting firms, ISO RTOs, and regulators.
  • Strong capability in Microsoft Excel, PowerPoint, Word, Adobe Acrobat, and Google Earth.
  • Bachelor’s and/or Master’s degree in Electric Power Systems Engineering and/or MBA.
  • Fluent in PSLF, PSSE, TARA, UPLAN, PSCAD, ASPEN, PowerWorld, and/or AutoCAD (preferred).

Benefits & Perks

Competitive compensation with a salary range of $162,172 to $190,170 USD plus bonus
Excellent benefits package including 401(k) matching
Comprehensive medical and dental plan options
Flexible PTO

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