Demo

Solar / BESS Engineer

Aspen Technical Staffing, Inc.
Illinois, IL Contractor
POSTED ON 4/21/2026
AVAILABLE BEFORE 5/20/2026

Job Title: Solar / BESS Engineer
Location: Multiple U.S. Locations (Remote Flexibility Available)
Job Type: Contract-to-Hire

Position Overview:
We are seeking a Solar / Battery Energy Storage System (BESS) Engineer to support a growing Energy practice across multiple office locations in the United States. This role offers flexibility to work remotely and/or from various office locations.

The ideal candidate will bring strong technical expertise in solar PV and BESS design, along with a solid foundation in power engineering. This individual will play a key role in delivering high-quality engineering solutions, supporting project execution, and contributing to both new and existing client relationships.

This position is best suited for a detail-oriented engineer who can work independently while collaborating with project teams and senior leadership.

Key Responsibilities:

  • Lead electrical engineering design for solar PV and BESS projects
  • Collaborate with Project Engineers and Project Managers to develop design schedules and budgets
  • Design solar PV systems including array layouts, DC string sizing, equipment layouts, and utility interconnections (rooftop, carport, and ground-mounted systems including fixed tilt and single-axis tracking)
  • Perform solar energy production modeling
  • Conduct BESS system sizing, technology selection, and controls design
  • Develop construction drawings, specifications, and equipment documentation
  • Perform engineering calculations (NEC compliance, conductor sizing, overcurrent protection, voltage drop, conduit sizing, etc.)
  • Create one-line and three-line diagrams
  • Develop Bills of Materials, cable and conduit schedules
  • Support cost estimating and financial/payback analysis
  • Design DC and low- to medium-voltage AC power distribution systems
  • Support projects throughout the full lifecycle (feasibility, design, bid, construction, commissioning)
  • Participate in client meetings and present engineering solutions
  • Provide guidance to junior engineers and support team development
  • Assist with technical proposals, budgeting, and scheduling
  • Travel occasionally to project sites or client locations

Minimum Qualifications:

  • Bachelor's degree in Electrical Engineering (or related field)
  • 4 years of experience in solar PV system design

Preferred Qualifications:

  • 8 years of experience in electrical engineering for commercial and utility-scale solar PV and BESS systems
  • EIT or PE license (Electrical or Mechanical)
  • Proficiency with AutoCAD, PVsyst, and Microsoft Excel
  • Experience with industry tools such as NREL SAM, Helioscope, or similar modeling software
  • Experience with battery energy storage systems and other renewable technologies
  • Medium-voltage AC collection system design experience
  • Strong knowledge of applicable codes and standards (NEC, IBC, NFPA 855, NESC, IEEE, etc.)
  • Experience supporting full EPC or Design/Build projects from concept through completion

Aspen Technical Staffing
CELEBRATING 25 YEARS
          ~2001-2026~

We are an Equal Opportunity Employer. All qualified applicants will receive consideration without regard to race, color, religion, sex, gender identity or expression, national origin, disability, veteran status, or any other protected characteristic under the law. Assistance with the application process is available upon request.
 

Hourly Wage Estimation for Solar / BESS Engineer in Illinois, IL
$53.00 to $69.00
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