Office Manager/Executive Assistant

Sierra Management and Technologies, Inc. (Sierra), provides industry-leading technologies in software engineering and application development. We solve our nation’s most complex, next-generation modernization and readiness challenges across defense, federal, and commercial markets.

Sierra is a small, disadvantaged, minority-owned business that values its employees who provide superior services and solutions to our customers. Sierra has a proud history of hiring veterans and encourages those who have served in the armed forces to apply.

Sierra is an honored recipient of the following awards:

• HIRE Vets Medallion Award
• VETS Indexes Employer Award

About the Role: 

We are seeking a highly organized and proactive professional to serve as both an Executive Assistant and Office Manager. The person serving in this role will be responsible for managing office operations and for providing administrative support to senior level executives. This role ensures smooth day-to-day office functions, serves as the first point of contact for visitors, and assists executive leadership with administrative tasks including managing schedules, coordinating meetings and travel, supporting internal communications, and overseeing day-to-day office operations including facilities management. The ideal candidate is highly motivated, takes ownership of tasks, and proactively seeks ways to improve office operations and senior executive support. They thrive in a fast-paced environment, demonstrate excellent judgment, and possess strong communication and problem-solving skills.

This is an on-site role in California, Maryland with the option of a four- or five-day workweek.

Key Responsibilities:

Executive Support

• Provide high-level administrative support to senior level executives, including calendar management, travel arrangements, and expense reporting.
• Prepare / draft reports, presentations, and correspondence on behalf of leadership.
• Assist with meeting coordination, including scheduling, agendas, and follow-ups.
• Maintain confidential records and handle sensitive information with discretion. 

Office Management & Reception Duties

• Greet visitors, answer phones and direct inquiries professionally.
• Ensure visitor logs are completed, and visitor policies are adhered to.
• Manage incoming and outgoing mail, deliveries, and office communications.
• Coordinates meeting space scheduling for all corporate office staff.
• Ensure the office and common areas remain organized, well-stocked, and presentable.
• Act as the facilities point of contact with COPT building management.
• Coordinate and ensure completion of office maintenance and maintain positive vendor relationships. 

Corporate Office Support

• Maintain records of key business operations information.
• Coordinate staff recognition emails and awards.
• Distribute task order memos.
• Manage the collection of corporate office supply order needs.
• Manage Sierra social media pages.
• Organize company events, meetings, and team activities.
• Support HR and finance processes, such as onboarding, expense reporting, and invoice tracking.

What Makes a Successful Candidate: 

To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below represent the knowledge, skill, and ability required. Reasonable accommodation may be made to enable individuals with disabilities to perform essential functions.

Must Haves:

• Five years of experience in an Executive Assistant, Office Manager, or similar administrative role. 
• Strong organizational, time management, and multitasking skills with keen attention to detail.
• Excellent verbal and written communication skills.
• Proficiency in Microsoft Office Suite (Word, Excel, PowerPoint, Outlook), Canva, and other administrative tools.
• Ability to maintain confidentiality and handle sensitive information with professionalism.
• Friendly, proactive, and adaptable to changing priorities.
• Ability to independently identify and implement process improvements to enhance administrative and operational effectiveness.
• Experience working in a dynamic, fast-paced environment.
• Ability to work independently, prioritize tasks, and anticipate needs without direct supervision.

Applicants must be able to obtain a security clearance.

We take care of our employees by providing the following benefits: 

• Flexible work schedules and remote/hybrid opportunities (depending on the role)
• Medical, dental, and vision insurance
• Flexible spending account and health savings account options
• Dependent care flexible spending account
• Education reimbursement
• Voluntary insurance such as: short-term disability, hospital indemnity, critical illness, and accident insurance
• 100% company-paid life + AD&D and long-term disability insurance
• Generous paid time off policy
• 11 paid holidays
• 401(k) retirement plan with matching contributions
• Employee assistance program

Equal Opportunity Statement

Building an inclusive, high-performing team that is diverse across lines of personal identity is integral to our success and we are proud to be an equal-opportunity employer.

This means we do not discriminate against any job applicant or employee because of their race, ethnicity, color, religion, national origin, sex, disability status, genetics, protected veteran status, gender identity or expression, sexual orientation, age, or any other characteristic protected by federal, state, or local laws. This applies to all terms and conditions of employment.

We actively strive and evolve to develop and maintain workspaces that are fully inclusive. We encourage candidates from underrepresented groups to apply.

E-Verify Statement

This employer participates in E-Verify and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S. If E-Verify cannot confirm that you are authorized to work, this employer is required to give you written instructions and an opportunity to contact Department of Homeland Security (DHS) or Social Security Administration (SSA) so you can begin to resolve the issue before the employer can take any action against you, including terminating your employment. Employers can only use E-Verify once you have accepted a job offer and completed the I-9 Form.