Business Administrator (entry-level)

Mercury Computing•Boulder, CO

4d•$30 - $35•Onsite

About The Position

Mercury is hiring its first Business Administrator to keep the operational backbone of a fast-moving seed-stage startup running smoothly. This is an entry-level or early-career role for someone who wants hands-on exposure to how a startup actually operates — finance, HR, vendor management, and executive support — while working directly with the founding team. You'll be the person who makes sure invoices get paid, meetings get scheduled, new hires get set up, and the small details that keep a growing company organized don't fall through the cracks. As Mercury scales, this role will grow with the company; the person who takes it on has real potential to own bigger pieces of business operations over time. This role is based out of our Boulder, CO headquarters, working in person alongside the founding team.

Requirements

0–2 years of professional experience (internships count); no specific degree or background required.
Highly organized, with strong attention to detail and a track record of following through on tasks without needing reminders.
Comfortable with ambiguity and shifting priorities — startup life means the job description evolves.
Strong written and verbal communication skills.
Proficiency with common office and productivity tools (Google Workspace, spreadsheets, calendar management); comfort picking up new tools quickly.
A proactive, "no task too small" attitude and genuine curiosity about how a startup operates.
Pragmatic, judgment-driven use of AI tools: you know when using AI to draft an email, summarize a document, or speed up a task is a smart shortcut, and when it's the wrong call — for anything involving sensitive company, financial, or legal information, or decisions that need real judgment. You use AI to move faster, not to think less; you still understand what's actually happening in the business, can explain and stand behind any work you produce, and never let a tool introduce risk or errors you didn't catch.

Nice To Haves

Prior experience in an office manager, executive assistant, or operations support role, even informally.
Exposure to basic bookkeeping, expense management, or HR administration tools (e.g., QuickBooks, Gusto, Rippling).
Interest in energy, climate, or data center/infrastructure markets.
Experience at a small company or startup.

Responsibilities

Keep the business running — process invoices and expense reports, manage vendor relationships and renewals, track budgets against spend, and support basic bookkeeping in coordination with our accountant/bookkeeper.
Support the team — manage calendars and scheduling for the founding team, coordinate travel for conferences and customer/utility meetings, and organize internal team events and offsites.
Own onboarding and HR admin — set up new hires with equipment, accounts, and paperwork; maintain employee records and benefits administration; support recruiting logistics like scheduling interviews and coordinating with candidates.
Keep us organized — maintain and organize company files, contracts, and records; keep shared drives and internal documentation up to date; help track and follow up on action items from leadership meetings.
Support fundraising and board logistics — help prepare and organize materials for board meetings and investor updates; track data requests and follow-ups during fundraising processes.
Pitch in wherever needed — as a small-team startup, you'll be asked to help across functions, from light research to helping prep for customer meetings and conferences.