The National Account Executive will retain and expand strategic customer accounts nationwide, develop account growth strategies, increase adoption of energy-efficiency programs, and serve as a trusted advisor to executive stakeholders. Responsibilities include managing high-volume accounts, conducting strategic business reviews, collaborating with internal teams, maintaining CRM opportunities, and mentoring sales team members. The role requires a proven record of exceeding $5 million sales goals, closing $100,000-plus deals, and selling energy-related services or capital projects.