SIDDHARTH TEMBURNI
Marlborough
Summary
Results-driven solar engineer and NABCEP certified PV Installation Professional with a strong track record across commercial and residential project lifecycles feasibility, engineering, procurement, construction, financing support, operations, and maintenance. Experienced in leading multi-site teams, standardizing SOPs, and improving execution quality, cycle time, and customer experience across territories. Highly self-motivated and collaborative, bringing a continuous improvement mindset and a commitment to safety, code compliance, and profitability while delivering scalable growth for the organization.
Overview
9
9
years of professional experience
27
27
Certifications
Work History
Senior Director of Engineering
Summit Energy Group
Mansfield
10.2022 - Current
- Oversee the company's engineering team and regulate installation practices for residential and commercial projects.
- Report directly to the company CEO and Co-founder, providing strategic updates and recommendations to improve overall operational excellence.
- Lead the commercial operations department to boost company revenue and increase profitability.
- Establish and drive the ESS value proposition to increase company's ESS attachment rate.
- Set the engineering vision, strategy, and multi-year roadmap aligned with company goals and growth targets.
- Serve as escalation owner for critical technical/customer issues, ensuring root cause analysis and durable preventative fixes.
- Own engineering governance across design, permitting, construction support, commissioning, and as-builts to ensure consistency and scalability.
- Lead continuous improvement initiatives (Lean/process improvement) to increase throughput and margin while maintaining compliance and quality.
- Approve invoices from distributors and construction companies. Support the executive leadership team in negotiating material and service costs.
- Collaborate with the service team to troubleshoot post-installation complications.
- Manage escalated customer issues and convert them into a 'WOW' customer experience.
- Review post install projects to ensure code compliant standards are followed by engineering and installation teams. Ensure effective change management for code updates, AHJ requirements, utility interconnection rules, and internal standards.
- Define and enforce QA/QC programs, including audit processes for engineering deliverables and field installations.
- Review department P&L statements and implement adjustments to improve process efficiency.
Director of Engineering
Summit Energy Group
Weymouth
10.2020 - 09.2022
- Led the Engineering department, managing both domestic and international teams to deliver consistent, high-quality project outcomes.
- Partnered with the executive leadership team to support commercial project financing, feasibility assessments, and go/no-go decision-making.
- Collaborated closely with electricians and field operations leadership to ensure safe, code-compliant installations and strong execution in the field.
- Owned planning and engineering support for residential ESS installations, ensuring designs, documentation, and processes enabled efficient deployment.
- Developed and maintained department SOPs, driving standardization, process discipline, and continuous improvement.
- Managed relationships with internal stakeholders and external customers, ensuring alignment, responsiveness, and high satisfaction.
- Led engineering efforts on complex residential and commercial projects, providing technical oversight, problem-solving, and escalation support as needed.
Lead Design Engineer
Summit Energy Group
Weymouth
06.2018 - 09.2020
- Reviewed and approved code-compliant residential and commercial solar PV final design layouts, including load calculations and engineering requirements for energy storage systems.
- Partnered with the CFO and CEO to support accurate pricing for commercial systems and residential ground-mount projects, aligning technical scope with margin targets.
- Designed and approved CAD drawing sets for permitting and utility interconnection across all served markets, ensuring accuracy, completeness, and timely submission.
- Hired, trained, and managed solar design interns and project coordinators to improve workflow efficiency, quality, and turnaround times.
- Coordinated directly with utility companies to secure PTO approvals and manage commercial interconnection application requirements through to completion.
- Diagnosed and resolved customer issues related to underperforming systems and monitoring platform concerns, driving clear communication and prompt corrective action.
Solar Design Intern
NRG Tree
Lowell
05.2017 - 12.2017
- Used industry and custom software tools to design residential and commercial PV systems, ensuring code-compliant layouts and accurate system sizing.
- Built and maintained spreadsheet models to analyze project cash flow, ROI, and payback scenarios to support pricing and sales decisions.
- Assisted in preparing design packages for permitting and utility submissions, including drawings, equipment schedules, and supporting documentation.
- Coordinated with internal teams (sales, engineering, operations) to gather project requirements and ensure smooth handoffs from design to execution.
- Created a customer satisfaction program protocol that improved customer engagement and contributed to a 30% increase in sales.
Solar Energy Intern
NextSun Energy
Edwards
05.2017 - 12.2017
- Coordinated with the Operations & Maintenance (O&M) team to monitor performance and availability across 17 commercial solar farms in Massachusetts, helping ensure consistent energy generation.
- Ran PVsyst simulations and production reports to develop/validate expected generation estimates and support performance benchmarking.
- Reviewed monitoring dashboards and production data to identify underperformance trends, downtime events, and potential equipment or communications issues.
- Assisted with troubleshooting site-level issues (inverter faults, communications outages, curtailment, and meter/monitoring discrepancies) and tracked corrective actions through resolution.
- Communicated with utility providers as needed to address interconnection-related issues and confirm site status, restoring generation as quickly as possible.
- Supported creation of incident logs and basic performance summaries to improve visibility for internal stakeholders and drive faster response times.
Education
M.S. - Energy Engineering - Solar
University of Massachusetts
Lowell, MA05.2018
B.E. - Mechanical Engineering
Savitribai Phule Pune University
MH, India05.2015
Skills
- Aurora
- AutoCAD
- HelioScope
- EverBright
- Sighten
- Solargraf
- PVsyst
- Energy Toolbase
- PVWatts Calculator
- SGHAT
- Solo
- AlsoEnergy
- Solis
- SolarEdge
- Enlighten
- Tesla
- FranklinWh
- NEC 2014
- NEC 2017
- NEC 2020
- NEC 2023
- IBC 2015
- IBC 2018
- IBC 2021
- NFPA 1
- NFPA 855
Websites
Software Proficiency
Aurora, HelioScope, EverBright (Sighten), Solargraf, PVsyst, Energy Toolbase, PVWatts Calculator, SGHAT, Solo, AlsoEnergy, Solis, SolarEdge, Enlighten, Tesla, FranklinWh
Certification
- NABCEP PV Installation Professional (PVIP)
- OSHA 30-Hour
- Rhode Island General Contractor (RI GC) for residential and commercial
- Rhode Island Renewable Energy Professional Certification (RI REPC)
Code And Standards Familiarity
- NEC: 2014, 2017, 2020, 2023
- IBC / IRC: 2015, 2018, 2021
- NFPA: NFPA 1, NFPA 855
Energy Storage Systems Certifications
- Generac
- Tesla
- Sonnen
- FranklinWH
- Enphase
- Briggs and Stratton
- Storz Power
Leadership And Industry Involvement
Served as a Judge for 3 consecutive years for the Solar District Cup (2021, 2022, 2023), organized by NREL and the U.S. DOE
Timeline
Senior Director of Engineering
Summit Energy Group
10.2022 - Current
Director of Engineering
Summit Energy Group
10.2020 - 09.2022
Lead Design Engineer
Summit Energy Group
06.2018 - 09.2020
Solar Design Intern
NRG Tree
05.2017 - 12.2017
Solar Energy Intern
NextSun Energy
05.2017 - 12.2017
M.S. - Energy Engineering - Solar
University of Massachusetts
B.E. - Mechanical Engineering
Savitribai Phule Pune University