Senior Manager of BESS Engineering

OneEnergy•Madison, WI

2d•$130,000 - $200,000

About The Position

The Senior Manager of BESS Engineering owns OneEnergy's battery energy storage engineering function and is accountable for establishing it as a repeatable, institutional capability. This is a senior, hands-on leadership role for an engineer with experience designing distributed generation (DG) and utility-scale BESS systems and carrying multiple projects through full construction and commissioning cycles. The role integrates BESS processes with OER's established PV processes, tools, and standards, develops BESS equivalents where needed, and works across Development, Preconstruction, Finance, and Engineering. The position reports to the VP of Engineering and directs future Associate Engineers. It requires strong interdepartmental coordination, initiative, and sound judgment in equipment, cost, and layout decisions. The role leads BESS plant design and design standards, equipment selection and pricing, CAPEX methodology, RFP responses, and coordination with internal teams and external partners. It maintains safety and regulatory documentation and serves as a bridge among Development, Preconstruction, Finance, and Engineering. The position also supports community outreach, permitting, and strategic pipeline planning as an extension of the Development team. The salary range is $130,000–$200,000, depending on location and experience. Compensation considers factors including skills, experience, training, licensure, certifications, geographic location, and organizational needs. OneEnergy offers six weeks of Paid Time Off per year, a Volunteer Time Off Program, comprehensive medical coverage, a 401(k) matching retirement plan, life insurance, wellness incentives, and other benefits. OneEnergy is an equal opportunity employer and does not discriminate against qualified applicants on the basis of protected characteristics.

Requirements

Degree in electrical, mechanical, or a related engineering field.
PE license or a clear, near-term path to licensure.
At least 6 years of professional engineering, construction, or land development experience, including a substantial and recent focus on battery energy storage.
Demonstrated experience taking multiple DG and/or utility-scale BESS projects through full construction and commissioning cycles.
Direct experience selecting, sizing, and procuring BESS equipment across multiple OEMs and integrators.
Strong familiarity with NEC (including Article 706), NESC, NFPA 855, and UL 9540 / UL 9540A as applied to energy storage systems.
Experience leading RFP responses and interconnection and permitting interactions with utilities and AHJs.
Experience managing internal engineering resources and direct reports, and comfort switching between management and hands-on design work.
Strong communication and negotiation skills with offtakers, contractors, and internal stakeholders.
Proficiency establishing equipment specifications to generate final submittals.
Strong attention to detail, high integrity, and proven organizational capacity to manage multiple projects simultaneously.
Willingness to contribute to a culture of trust and accountability.
A hands-on, solutions-oriented attitude, with integrity, credibility, and professional responsibility.
Ability to travel and access sites of varying terrain, an acceptable driving record, and an active driver's license.

Responsibilities

Define and maintain BESS design standards, templates, and workflows, including single-line diagrams (SLDs), layouts, and equipment specifications, keeping them current with the team's PV standards.
Establish and enforce a workflow for tracking BESS status, tiering, and prioritization across company strategies.
Lead distributed generation and utility-scale BESS plant design; review and approve high-voltage substation, medium-voltage collection, and BESS plant drawing packages at each design stage.
Lead design and modeling discussions across the engineering team and outside consultants.
Lead BESS CAPEX methodology by matching commercial opportunities to equipment sizing, guarantees, and warranties and developing equipment and EPC cost estimates.
Drive equipment selection and pricing in collaboration with the Preconstruction Team.
Own relationships with key BESS integrators, equipment providers, and contractors.
Maintain safety standards and keep documentation current with NFPA 855, NEC (including Article 706), NESC, and UL 9540 / UL 9540A requirements.
Lead BESS RFP responses, coordinating internal resources and vendor technical details and assumptions, and reusing or escalating prior material to enable fast turnarounds.
Provide feedback on System Impact and Feasibility Studies as needed.
Coordinate across Development, Preconstruction, Finance, and Engineering, handing finalized equipment selections and quantities to Engineering for SLDs and layouts.
Support the Development team with community outreach, permitting, and strategic pipeline planning.
Direct future Associate Engineers.
Travel to and access sites with varying terrain.