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Administrative Assistant II

Job in Lone Tree, Douglas County, Colorado, 80124, USA
Listing for: Sierra Nevada Corporation
Full Time position
Listed on 2026-06-12
Job specializations:
  • Administrative/Clerical
    Office Administrator/ Coordinator, Virtual Assistant/ Remote Admin, Business Administration
Job Description & How to Apply Below
Are you a tech-savvy administrative professional looking for your next challenge? Join our dynamic team as an Administrative Assistant II and become a vital partner to our Director and Vice President-level leaders. In this role, you'll support top executives by expertly managing complex calendars, coordinating meetings and travel, preparing impressive reports and presentations, and ensuring seamless day-to-day operations. Your proactive approach and organizational skills will contribute directly to our company's success.

The ISR (Intelligence, Surveillance & Reconnaissance), Aviation, and Security (IAS) business area is a leader in ISR and aviation, it is a leading prime manned and unmanned aircraft systems integrator for innovative, high-performance ISR and aviation systems. Its end-to-end Command, Control, Computers, Communications and Intelligence, Surveillance & Reconnaissance (C4

ISR) capabilities encompass design, integration, test, certification, ground/flight training and complete logistics support. IAS tailors solutions to customer cost, performance, and schedule requirements and designs to consistently exceed expectations - with an unrivaled record of on time and on (or under) budget deliveries.

Responsibilities:

* Efficiently manage complex inquiries from both internal and external sources.

* Prepare, consolidate, and route detailed reports and presentations.

* Create, edit, and manage complex spreadsheets to support various administrative tasks.

* Prepare and submit expense reports and purchase requisitions.

* Maintain databases and ensure accurate data entry in compliance with company policies.

* Coordinate business meals, on-site meetings, and events, including all logistics.

* Provide advanced support to IT and Facilities for conference room and public area maintenance.

* Manage calendars for senior leaders, including meeting and travel arrangements.

* Edit, format, and send communications, presentations, and documents.

* Act as a liaison between executives and internal/external stakeholders.

* Handle high-level administrative tasks with a focus on business operations.

* Support onboarding and training for new employees.

* Organize team-building and employee engagement activities.

* Handle confidential information with discretion.

* Assist in project planning, execution, documentation, and reporting.

* Support budget planning and vendor management.

* Sit at the front desk, support visitor check-ins, and manage office supplies.

* Provide backup support to the administrative team as needed.

Qualifications You Must Have:

* High school diploma or equivalent.

* 3+ years of relevant experience in office administration or administrative support.

* Proficient in Microsoft Office Suite (Word, Excel, Outlook, Teams, One Note, SharePoint Online) and travel/expense platforms (e.g., Concur).

* General knowledge of administrative practices, including expense reporting, purchase requisitions, and coordinating meetings, events, and travel.

* Foundational knowledge of project management applications (e.g., Microsoft Project, Smartsheet) and ticketing systems (e.g., Service Now).

* Excellent communication, problem-solving, and organizational skills.

* Professional demeanor and ability to handle sensitive information with discretion.

Qualifications We Prefer:

* Associate's degree in Business Administration or related field.

* Experience in the Aerospace and Defense industry.

* Advanced knowledge of Workday or similar HRIS systems.

* Certifications such as PACE (Professional Administrative Certification of Excellence) or CAPM (Certified Associate in Project Management) are a plus.

* Experience with Concur Travel and Expense platform or other travel management systems.

* Experience working in a U.S. military or Department of Defense (DoD) environment.

Essential Functions:

* Ability to lift up to 20 lbs regularly.

* Ability to sit or stand for extended periods.

* Proficiency with computers and office equipment.

* Manual dexterity for handling office supplies and equipment.

* Ability to work in an office environment.

* Ability to travel may be required.

This posting will be open for application for a minimum of 5 days and may be extended…
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