OFFICE ADMINISTRATOR

PT Amman Mineral Nusa Tenggara; Nusa Tenggara Barat; On-site; IDR 72,000,000 - 120,000,000; Full time

Job summary

PT Amman Mineral Nusa Tenggara, West Sumbawa site, is seeking an energetic Office Administrator to provide comprehensive administrative support for day-to-day operations, ensuring efficient coordination across departments.

You will manage calendars, travel arrangements, prepare reports and documents, handle invoicing and procurement liaison, and build strong relationships with internal and external stakeholders while maintaining confidentiality and accuracy.

Qualifications

• Diploma or Bachelor's Degree in Business Administration, Office Management, Management, Accounting, or a related discipline.
• Minimum 3 years of experience in office administration, executive administration, administrative support, or a similar role.
• Strong administrative, organizational, and coordination skills with the ability to manage multiple tasks and priorities effectively.
• Proficiency in Microsoft Office applications, including Word, Excel, PowerPoint, Outlook, and other business support tools.
• Experience managing travel arrangements, schedules, documents, and office logistics.
• Experience processing invoices, expense claims, vendor coordination, and administrative reporting is highly desirable.
• Strong customer service mindset and ability to provide professional support to employees, visitors, contractors, and external partners; Strong attention to detail with the ability to maintain accurate records, reports, and documentation; Ability to work independently, maintain confidentiality, and exercise sound judgment in handling sensitive information; Strong problem-solving, planning, and time management skills; Demonstrates a strong commitment to safety, integrity, teamwork, and continuous improvement.
• Excellent verbal and written communication skills with the ability to interact effectively with stakeholders at all levels; Fluent in Bahasa Indonesia; English proficiency, both written and spoken, is an advantage.

Responsibilities

• Provide comprehensive administrative support to ensure efficient day-to-day office operations and effective coordination across departments.
• Manage calendars, appointments, meetings, and travel arrangements for team members and key stakeholders.
• Prepare, maintain, and distribute correspondence, reports, presentations, meeting materials, and other administrative documentation.
• Maintain organized filing systems, records, and databases to ensure accurate document control and information accessibility.
• Coordinate visitor arrangements, including accommodation, transportation, site access, and other logistical requirements.
• Process invoices, expense claims, and supporting documentation while liaising with vendors, Procurement, Finance, and other internal stakeholders.
• Support consultant and vendor onboarding activities, ensuring administrative requirements are completed accurately and in a timely manner.
• Monitor office supply inventory and coordinate procurement activities to ensure uninterrupted office operations.
• Assist in preparing periodic reports, tracking administrative activities, and maintaining departmental records.
• Build effective working relationships with internal and external stakeholders to support operational efficiency and service excellence.
• Ensure all administrative activities are conducted in accordance with company policies, procedures, and governance requirements.
• Other duties as assigned.

Skills

Office administration

Calendar management

Travel coordination

Document management

Vendor coordination

Reporting

Communication

Bahasa Indonesia

English proficiency

Education

Diploma or Bachelor's Degree in Business Administration/Office Management/Accounting

Tools

Microsoft Office

Excel

Outlook

PowerPoint

Job description

• Provide comprehensive administrative support to ensure efficient day-to-day office operations and effective coordination across departments.
• Manage calendars, appointments, meetings, and travel arrangements for team members and key stakeholders.
• Prepare, maintain, and distribute correspondence, reports, presentations, meeting materials, and other administrative documentation.
• Maintain organized filing systems, records, and databases to ensure accurate document control and information accessibility.
• Coordinate visitor arrangements, including accommodation, transportation, site access, and other logistical requirements.
• Process invoices, expense claims, and supporting documentation while liaising with vendors, Procurement, Finance, and other internal stakeholders.
• Support consultant and vendor onboarding activities, ensuring administrative requirements are completed accurately and in a timely manner.
• Monitor office supply inventory and coordinate procurement activities to ensure uninterrupted office operations.
• Assist in preparing periodic reports, tracking administrative activities, and maintaining departmental records.
• Build effective working relationships with internal and external stakeholders to support operational efficiency and service excellence.
• Ensure all administrative activities are conducted in accordance with company policies, procedures, and governance requirements.
• Other duties as assigned.

What skills and experience do you need?

• Diploma or Bachelor's Degree in Business Administration, Office Management, Management, Accounting, or a related discipline.
• Minimum 3 years of experience in office administration, executive administration, administrative support, or a similar role.
• Strong administrative, organizational, and coordination skills with the ability to manage multiple tasks and priorities effectively.
• Proficiency in Microsoft Office applications, including Word, Excel, PowerPoint, Outlook, and other business support tools.
• Experience managing travel arrangements, schedules, meetings, document administration, and office logistics.
• Experience processing invoices, expense claims, vendor coordination, and administrative reporting is highly desirable.
• Strong customer service mindset and ability to provide professional support to employees, visitors, contractors, and external partners; Strong attention to detail with the ability to maintain accurate records, reports, and documentation; Ability to work independently, maintain confidentiality, and exercise sound judgment in handling sensitive information; Strong problem-solving, planning, and time management skills; Demonstrates a strong commitment to safety, integrity, teamwork, and continuous improvement.
• Excellent verbal and written communication skills with the ability to interact effectively with stakeholders at all levels; Fluent in Bahasa Indonesia; English proficiency, both written and spoken, is an advantage.

Working Location: Site Based – West Sumbawa

Working Schedule: Regular Working Days 5:2 (Monday-Friday)

Closing Date Application: 28 September 2026