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Sales Development Representative Intern at Lumen Energy. Remote Location: Remote. About Lumen. Lumen Energy is building the transaction platform for the electric era. We partner with commercial real estate owners to turn underutilized rooftops into reliable, long-term income. We do this by delivering investment-grade analysis powered by our proprietary Lux Engine, securing transparent competition among top solar and battery developers, and providing white-glove service throughout. Owners unlock predictable ancillary revenue, advance sustainability goals, and scale clean energy across their portfolios without distraction from their core business.. We work with the largest names in institutional commercial real estate, including Nuveen, KKR, JP Morgan Asset Management, Apollo, and Hines. Backed by Lowercarbon Capital, Designer Fund, and Moxxie VC, our team comes from Google X, Arcadia, Stripe, and leading CRE and finance firms, united by a mission to power the built world with profitable clean energy.. We are a remote-first company, but we do have an office in San Francisco if you're local.. Responsibilities. Prospect and research target accounts and contacts; help refine our Ideal Customer Profile (ICP).. Execute daily multi-channel outbound: cold calls, email, and LinkedIn outreach.. Manage and execute AiSDR campaigns (set up targets, messaging variants, launches, monitoring, and iteration).. Lead creative outreach experiments (A/B tests on subject lines, openers, CTAs, sequences, and personas); document results and recommend next tests.. Qualify inbound and outbound responses; schedule meetings and provide clean handoffs with context.. Maintain accurate records of activities, outcomes, and notes in HubSpot; keep data clean and organized.. Collaborate with Sales and Marketing to improve messaging, objection handling, and outbound templates.. What you bring. Strong written and verbal communication; ability to write concise, personalized outreach.. Comfort with cold calling and resilience with rejection.. High ownership, reliability, and follow-through; able to operate with minimal supervision.. Highly organized and detail-oriented; disciplined about tracking work and results.. Nice to have. Experience with HubSpot (or other CRM), sequencing tools, and list-building/research workflows.. Familiarity with LinkedIn Sales Navigator.. Familiarity with latest AI technologies (Claude / co-work, AISDR, notion AI). Interest in clean energy, commercial real estate, or B2B sales.. Role details. Internship (part-time or full-time). Location: Remote (US) or NYC preferred. Start: ASAP (flexible). Lumen Energy is an equal opportunity employer. We celebrate diverse perspectives and are committed to building an inclusive workplace. US work authorization required. We are unable to sponsor H1B visas at this time.