CEO Office & Operations Lead — Administrative Assistant

Alta Resource Technologies, Inc.; Boulder (CO); On-site; USD 80,000 - 95,000; Full time

Benefits offered by this job

Flexible Time Off

Company Holidays

Job summary

Alta Resource Technologies, Inc. is hiring a Sr. Administrative Assistant / Office Manager to support the Office of the CEO in Boulder.

This high-trust, high-visibility role manages calendars, travel, office operations, and coordination across leaders, ensuring smooth daily functions and timely information flow. The successful candidate will handle onboarding, board logistics, expense reporting, and external communications, while maintaining confidential personnel records and coordinating

Qualifications

• Associate’s or Bachelor’s degree, or equivalent experience.
• Three to five years of administrative, executive support, or office operations experience.
• Demonstrated ability to manage complex calendars and competing priorities.
• Proven discretion with confidential personnel, financial, and board information.
• Strong written and verbal communication with external partners and investors.
• Highly organized with proactive follow-through.
• Proficiency with Google Workspace or Microsoft 365 and video conferencing tools.
• Availability outside standard hours for events, VIPs, or investor visits.
• U.S. citizenship and valid passport required.

Responsibilities

• Own calendar management for the CEO and for VPs and C-suite leaders as needed.
• Schedule and reschedule meetings, resolve conflicts, and protect focus time.
• Coordinate complex multi-party meetings across functions and facilities.
• Book and manage domestic and international travel for the executive team.
• Administer vendor relationships for office services and procurements.
• Maintain purchasing and supply processes within budgets.
• Assemble, format, and distribute meeting materials and agendas.
• Capture notes and action items and route them to tracking systems.
• Coordinate onboarding logistics and new-hire processes.
• Plan and execute company events and investor visits.

Skills

Administrative experience

Executive support

Office operations

Education

Associate’s or Bachelor’s degree, or equivalent experience

Tools

Google Workspace

Microsoft 365

Video conferencing

Expense management tools

Job description

Alta Resource Technologies, Inc. is hiring a Sr. Administrative Assistant / Office Manager to support the Office of the CEO in Boulder.

This high-trust, high-visibility role manages calendars, travel, office operations, and coordination across leaders, ensuring smooth daily functions and timely information flow. The successful candidate will handle onboarding, board logistics, expense reporting, and external communications, while maintaining confidential personnel records and coordinating