Illumine-i

Senior Customer Success Engineer

Join Illumine-i in Chennai as a Senior Customer Success Engineer managing key solar accounts. Drive revenue growth through upselling, strategic planning, and client engagement. Benefit from a dynamic work environment and advanced AI tools to optimize account performance.
Illumine-i
Illumine-i
Chennai, Tamil Nadu, India On-site Full time UTC+05:30

Illumine-i

Company Overview

Illumine Industries (Illumine-i)

Austin, Texas, United States

2015

Approximately 220 employees (source: linkedin.com). Revenue of $12.5 million in FY 2023 (source: illumine.keka.com).

What They Do

Illumine-i specializes in solar photovoltaic (PV) engineering and design services, focusing on promoting environmental sustainability through innovative engineering solutions. The company provides comprehensive design and engineering support tailored to the needs of residential rooftop and commercial & industrial (C&I) solar developers, as well as engineering, procurement, and construction (EPC) firms. Their service offerings include schematic line drawings, system sizing, production estimates, and complete solar layout designs, ensuring that clients receive customized solutions rather than generic offerings (source: linkedin.com). Illumine-i is also expanding its capabilities into Battery Energy Storage Systems (BESS), electric vehicle (EV) charging stations, and grid modernization technologies, positioning itself as a comprehensive engineering consulting firm in the renewable energy sector (source: illumine.keka.com).

Projects & Track Record

Illumine-i has a documented portfolio of approximately 200 MW of solar PV design engineering experience in the United States, having completed over 100 projects across various service lines. Notable projects include the Elios Solar Carport, which has a capacity of 350 kW DC. The company has also undertaken utility-scale solar PV projects with system sizes ranging from small residential installations to over 100 MW (source: linkedin.com). Their experience is bolstered by the expertise of CEO Nithish Sairam, who has previously managed large-scale projects across the country, bringing valuable insights to Illumine-i's operations (source: illumine.keka.com).

Recent Developments

In October 2025, Illumine-i was featured in Business View Magazine, highlighting its expansion into microgrids, energy storage, and transmission & distribution projects. Co-Founder Sudarsan Krishnan emphasized the company's commitment to building engineering solutions that address complex energy challenges (source: illumine.keka.com). Additionally, in September 2022, Illumine-i partnered with Raiven, enhancing its capabilities in the electrification market by providing electrical drawings for permitting, which has significantly increased project throughput (source: linkedin.com).

Working There

Illumine-i employs a diverse workforce, including mechanical engineers, software developers, and specialized solar engineers, structured around functional areas such as solar design engineering and utility-scale project engineering. The company maintains active operations in Austin, Texas, Brisbane, Australia, and Chennai, India, with the Austin headquarters serving as the primary employment hub (source: illumine.keka.com). The company promotes a progressive work culture that emphasizes employee engagement, transparency, and cross-functional career development, allowing employees to transition between roles and departments (source: linkedin.com).


Last updated on Feb 23, 2026 | Report an issue

Job Description

As a Senior Customer Success Executive, you will manage a portfolio of accounts, driving revenue growth through relationship management, account intelligence, and business development. Your primary focus is to protect existing revenue, expand account value through upselling and cross-selling, and delivering exceptional customer experiences. This role is perfect for someone who excels at strategic account planning, revenue optimization, and data-driven decision-making in a fast-paced solar engineering environment.

What you can expect as a Senior Customer Success Executive at Illumine-i

  • You'll own and manage strategic client accounts, ensuring revenue protection, growth, and timely payment realization.
  • You'll drive upselling and cross-selling initiatives by identifying expansion opportunities within existing accounts and developing compelling business cases.
  • You'll develop and maintain deep account intelligence through regular client engagement, understanding business needs, pain points, and growth opportunities.
  • You'll coordinate with internal teams (Design, Engineering, Sales & PMO) to ensure timely project delivery and quality, and proactive issue resolution to drive client satisfaction.
  • You'll utilize CRM and Project Management tools to track account health, project progress, revenue pipeline, and optimize client engagement strategies.
  • You'll analyze account data using AI-powered tools to identify trends, predict churn risks, and uncover revenue expansion opportunities.
  • You'll create client reports using Microsoft Excel, PowerPoint, and AI tools to present account performance, insights, and strategic recommendations.
  • You'll manage payment collection and revenue realization, ensuring timely invoice collection and resolving payment delays proactively.
  • You'll conduct strategic account planning sessions, including quarterly business reviews (QBRs) to align on goals, demonstrate value, and identify growth pathways.

Essential Qualifications Include

  • Degree in Engineering and/or Management.
  • 2-5 years of experience in account management, customer success, or client engagement within Power engineering, or other engineering sector.
  • Proven track record of driving revenue growth through upselling, cross-selling, and account expansion strategies.
  • Commercial acumen with understanding of revenue models, pricing strategies, and payment management.
  • Strong business communication and strategic relationship management skills with ability to engage executives and decision-makers.
  • Proficiency in CRM tools, Microsoft Excel, PowerPoint, and AI-powered analytics tools or data analysis and insights generation.

Apply now

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About the role

March 25, 2026

Full time

Company

April 4, 2026

On-site

Solar Energy

Illumine-i

illuminei.com

  •  Chennai, Tamil Nadu, India

2-5 years

UTC+05:30