Administrative Assistant

TAR•Austin, TX

24d

About The Position

As Administrative Assistant, you own TAR’s operational backbone, including office operations, payroll and core HR administration, travel, expenses, and team events. You will manage details ranging from new-hire paperwork to flights and hotels for site trips in West Texas. You will work closely with the founders, leadership, and finance team, as well as other Administrative Assistants, while retaining ownership of the people and office processes that keep TAR running. Leadership sets policy and finance owns the books; you own execution, records, and the systems that make both reliable. As TAR scales, you will replace ad hoc workarounds with lightweight, repeatable processes.

Requirements

At least 3 years of experience in office management, people operations, HR, executive support, or a generalist operations role at a startup or similar environment.
Hands-on experience running payroll and handling core HR administration, including onboarding, offboarding, benefits, PTO, and employment paperwork.
Working knowledge of basic US employment compliance and HR recordkeeping, with judgment to know when to escalate to counsel or an outside advisor.
Exceptional attention to detail and a track record of reliability managing many moving pieces without dropping any.
Practical problem-solving skills, including finding answers, vendors, or workarounds independently and knowing when to move quickly or carefully.
Clear, direct communication and follow-through coordinating across a busy team.
Discretion and sound judgment with sensitive payroll, HR, and financial information.

Nice To Haves

Experience standing up payroll or expense systems at an early-stage company.
Familiarity with a modern HRIS/payroll platform and an expense management tool.
Bookkeeping or finance-adjacent experience.

Responsibilities

Run day-to-day office operations, including supplies, equipment, vendors, and facilities.
Own payroll and core HR administration, including onboarding and offboarding, benefits enrollment, PTO tracking, employment paperwork, and basic compliance.
Plan and book team travel, including recurring site trips to West Texas, coordinating flights, hotels, ground transport, and logistics.
Own the expense process by collecting and organizing receipts, tracking and reconciling spending, and providing finance with complete records on schedule.
Plan and run team events, offsites, and the annual office party.
Take ownership of urgent or unassigned work, resolve it, and close the loop.
Build and improve lightweight systems across HR, payroll, expenses, and scheduling, replacing ad hoc workarounds with documented, repeatable processes.
Manage scheduling and operational needs for the founders and leadership team, protecting their time and keeping commitments on track.