The Sr. ISP Estimator role is a direct-hire position based in Sterling, VA, requiring onsite work five days a week. The role involves developing detailed cost estimates for low-voltage infrastructure, including fiber and copper cabling, racks, containment, and power systems for data centers and hyperscale environments nationwide. Candidates need 7-10 years of experience in estimating structured cabling projects, strong knowledge of industry standards (TIA/EIA, BICSI, NEC), and proficiency with estimating software. Responsibilities include analyzing project specs, preparing takeoffs, collaborating with teams, supporting proposals, and refining estimating processes. Preferred candidates have experience with hyperscaler clients, vendor relationships, and design-build estimating. The position offers a salary range of $115,000–$130,000 plus bonus and benefits, with an interview process consisting of two onsite rounds. Strong analytical, communication, and constructability skills are essential.