Office Administrator & Accounting Support

3rd Millennium Classrooms • San Antonio, TX

1d

About The Position

We’re looking for a highly organized, proactive, and detail-oriented Office Administrator to support day-to-day operations and help keep our team running efficiently. This role is ideal for someone who enjoys administrative responsibilities with light accounting functions, thrives in a fast-paced environment, and takes pride in accuracy, organization, and follow-through.

As an Office Administrator at 3rd Mil, you’ll play a key role in office operations, customer support, and accounting billing/receiving processes. You’ll serve as a central point of coordination for Help Desk support and internal operations, working closely with teams across the company to support a well-organized, productive workplace.

Requirements

• Understanding of A/R and A/P processes
• Experience with Google Workspace and Microsoft Office tools
• Excellent organizational, prioritization, and time management skills
• Strong communication skills (verbal and written)
• Attention to detail and strong proofreading ability
• Ability to multitask and manage competing priorities effectively
• Comfort working independently in a fast-paced environment
• Proactive, problem-solving mindset
• Ability to quickly learn new systems and technologies
• Openness to feedback and a growth-oriented attitude

Responsibilities

• Answer incoming Help Desk support calls and ensure timely assistance
• Expedite resolution of support requests through JIRA to maximize customer satisfaction
• Identify patterns or recurring issues and proactively alert technical staff
• Share insights from frontline support with internal teams to improve processes
• Support Client Success with kit assembly and shipping as needed
• Manage office inventory, including mailing, print, and conference supplies
• Coordinate conference logistics and preparation
• Handle shipping and deliveries (USPS, UPS, FedEx, etc.)
• Run errands and provide general support to the physical office team
• Process and deposit checks; assist with invoice payments
• Investigate and resolve customer chargebacks
• Maintain office cleanliness and coordinate cleaning/maintenance services
• Plan and organize team events, outings, and celebrations
• Manage digital systems including HubSpot basics and Vonage phone system
• Maintain shared calendars and organize paper/digital files
• Support cross-functional teams by taking on additional tasks as needed
• Continuously improve through feedback and professional development

Benefits

• Health, dental, and vision insurance
• Health savings account (HSA) with company match
• 401(k) with company match
• Long-term Disability insurance
• Paid time off and holidays
• Opportunities for professional growth and advancement

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level
• Education Level: No Education Listed