Sr Administrative Assistant

Sierra Nevada Corporation•Englewood, CO

3d•Onsite

About The Position

As a Sr. Administrative Assistant, you will partner with one or more of our executive leaders and play a key role in helping them achieve their goals. You’ll get to help them manage their busy schedules, prepare for meetings, and stay on top of their day-to-day tasks. You’ll be a trusted partner and an integral part of their team, ensuring that they have everything they need to be successful. You’ll be proactive in anticipating their needs and will be able to handle any surprises that come your way with grace and ease. Plus, you’ll be a tech wizard using multiple state-of-the-art tools for optimal efficiency. And that’s not all - you'll be a master a managing multiple tasks and projects, and you’ll be able to prioritize your work to ensure that everything gets done on time. On top of it all, you'll get to leverage your expertise to model high standards for our tight-knit team of professionals and help everyone provide consistent, proactive, and exceptional administrative support. 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 (C4ISR) 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.

Requirements

High school diploma or equivalent.
7+ years of relevant experience in office administration or administrative support role.
Higher level relevant degree may substitute for experience.
Highly organized, professional demeanor and communication, experience bringing teams together.
Proficient in Microsoft Office Suite (e.g. Word, Excel, Outlook, Teams, OneNote and SharePoint Online), Travel and Expense Platforms (e.g. Concur), and Project Management Applications (e.g. Smartsheet or Microsoft Project).
Proficient knowledge of administrative practices including preparing expense reports and purchase requisitions and coordinating meetings, events and travel.
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.
Ability to obtain and maintain a Secret U.S. Security Clearance.
U.S. Citizenship status is required as this position needs an active U.S. Security Clearance for employment.

Nice To Haves

Associate’s degree in Business Administration or a related field.
Extensive experience in the Aerospace and Defense industry.
Mastery of Workday or similar HRIS systems.
Certifications such as Professional Administrative Certification of Excellence (PACE) are optional but beneficial.
Professional demeanor and excellent communication skills.
Strong organizational skills with the ability to manage multiple tasks simultaneously.
Excellent interpersonal skills and ability to work well with teams.
Ability to develop solutions to moderately complex problems by applying experience and knowledge.
Ability to handle confidential and sensitive information.

Responsibilities

Provide strategic administrative partnership to Executives by anticipating needs, identifying operational gaps, and recommending process improvements that enhance leadership effectiveness.
Conduct thorough research and prepare executive‑level briefings, summaries, and talking points to support strategic discussions and decision‑making.
Monitor key initiatives and deliverables on behalf of Executives, ensuring timely updates, follow‑up actions, and cross‑departmental accountability.
Serve as a high‑trust liaison with senior leaders, partners, clients, and other stakeholders to support executive visibility, engagement, and relationship management.
Support the coordination of executive‑level committees, workgroups, or strategic forums, including preparing agendas, collecting materials, and documenting outcomes.
Track and synthesize information from multiple sources to provide Executives with clear insights, risks, and recommendations.
Maintain awareness of organizational priorities to proactively align scheduling, communications, and project coordination with leadership goals.
Collaborate closely with cross‑functional teams to drive alignment, remove barriers, and support successful execution of operational and strategic initiatives.