What are the responsibilities and job description for the Office Administrator & Accounting Support position at 3rd Millennium Classrooms?
About 3rd Millennium Classrooms
3rd Millennium Classrooms is on a mission to change behavior through education. Since 1999, we have partnered with higher education institutions, court systems, secondary school districts, and organizations nationwide to deliver engaging, evidence-based courses that make a real difference. When you join our team, you’re not just selling a product — you’re helping people change their lives.
Our Culture Is
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.
What You’ll Do
Apply today and help us make an impact nationwide through meaningful, behavior-changing education.
3rd Millennium Classrooms is on a mission to change behavior through education. Since 1999, we have partnered with higher education institutions, court systems, secondary school districts, and organizations nationwide to deliver engaging, evidence-based courses that make a real difference. When you join our team, you’re not just selling a product — you’re helping people change their lives.
Our Culture Is
- Innovative — forward-thinking, agile, and unafraid to take smart risks that drive meaningful impact.
- Team-oriented — drama-free, respectful, and accountable; we collaborate across teams to make things right and deliver results.
- Tenacious — persistent and determined, we approach challenges with resilience and a growth mindset.
- Ethical and emotionally intelligent — we act with honesty, empathy, and professionalism in every interaction.
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.
What You’ll Do
- 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
- 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
- Answer Help Desk calls promptly and return voicemails within one hour
- Respond to or reassign all JIRA tickets within one hour
- Escalate critical issues to the appropriate team members quickly
- Maintain adequate office and mailing supply levels at all times
- Process mail, shipments, and deposits daily
- Ensure office cleanliness and coordinate maintenance as needed
- Successfully plan and execute team events and office activities
- Contribute to process improvements through proactive communication
- Dedicate at least 5 hours per month to professional development
- 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
Apply today and help us make an impact nationwide through meaningful, behavior-changing education.