Sublime is advancing a breakthrough, clean, efficient, low-waste process for manufacturing cement, the essential ingredient in the most-consumed human-made material on Earth: concrete. Replacing 200-year-old manufacturing methods that are reliant on kilns running hotter than lava, our near-ambient-temperature, electrochemical technology manufactures industry-accepted cement and critical minerals. We’re partnering with leading general contractors, concrete producers, developers, and technology hyperscalers to deploy our clean, durable, beautiful Sublime Cement® in infrastructure that is defining the future of clean construction. Backed by some of the world’s largest cement producers, leading private investors, and the U.S. Department of Energy, we are assembling a talented, collaborative team that is "amped about cement" (pun intended) and committed to operating on the frontiers of material science, manufacturing, industry, construction, and commercial partnerships, to advance cement innovation that will endure for the next millennium.

Sublime Systems is seeking an organized, resourceful, and proactive Sr. Office Coordinator to support the daily operations of our fast-growing headquarters and help cultivate a high-functioning, mission-driven workplace. This role is ideal for someone who thrives in a fast-paced environment, takes initiative, and enjoys supporting teams through thoughtful coordination and behind-the-scenes execution.

As a key member of the Operations team, the Sr. Office Coordinator acts as a central point of support across teams—managing internal logistics, office facilities coordination, and employee experience. From meeting prep and office upkeep to onboarding support and event logistics, you’ll play a critical role in ensuring our work environment is professional, efficient, and welcoming. The ideal candidate is a hands-on problem-solver who manages competing priorities with poise, anticipates team needs, and takes pride in enabling others to do their best work.

This is a full-time, in-person position in Somerville, MA, with flexibility to occasionally work from home depending on team and project needs.