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Senior Administrative Assistant
Senior Administrative Assistant-January 2024
Santa Ana
Jan 14, 2026
About Senior Administrative Assistant

What We're Looking For

At HNTB, you can create a career that is meaningful to you while building communities that matter to all of us. For more than a century, we have been delivering solutions for some of the largest, most complex infrastructure projects across the country. With our historic growth, it is an exciting time to join our team of employee-owners.

This opportunity requires, under limited supervision, proactively anticipating needs and expeditiously prioritizing urgent tasks with proficient follow-through. Typically provides administrative support to officers and leadership. Administrative functions will include maintaining calendars, scheduling meetings, making travel arrangements, tracking and submitting expenses, and performing other duties such as coordinating arrangements for meetings from planning meals to arranging transportation. Utilizes Outlook, Word, Excel, PowerPoint, and various HNTB software applications to perform tasks.

What You’ll Do:

Maintains multiple calendars and schedules appointments. Coordinates and schedules meetings and prepares meeting agendas. Coordinates and arranges the logistics and details of travel and accommodations, and prepares travel itineraries.

Screens incoming calls, emails, letters and visitors. Answers routine questions and provides information on behalf of the manager. Sorts and distributes incoming mail and prepares outgoing mail. Routes or answers routine correspondence not requiring manager’s attention.

Communicates management’s instructions or desires to various individuals and/or departments and initiates follow-up action. Furnishes and obtains information from other executives or outside representatives as requested.

Prepares reports, gathering and summarizing a variety of data from multiple sources. Composes and produces a variety of correspondence, reports and presentations under general guidance using the appropriate software for word processing, graphics and spreadsheets.

Organizes and maintains office files (electronic and hardcopy) and records in accordance with internal retention policy and procedures.

Prepares and submits expense reports, ensuring timely processing, supporting documentation and accurate coding of expense items.

May transcribe dictation, often covering subjects of a technical and/or confidential nature.

Performs other duties as assigned.

What You’ll Need:

High School Diploma/GED or equivalent

4 years related administrative experience

What We Prefer:

Ability to maintain confidentiality

Planning, time management and organizational skills

Ability to balance multiple tasks and changing priorities

Attention to detail

Demonstrated ability to compose, edit, and proofread written documents (emails, etc.)

Additional Information

Click here for benefits information: HNTB Total Rewards

Click here to learn more about EOE including disability and vet

Visa sponsorship is not available for this position.

#NF

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Locations:

Atlanta, GA, Kansas City, MO, New York, NY, Santa Ana, CA (Irvine)

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The approximate pay range for New York is $24.81 - $46.52. Please note that the pay range provided is a good faith estimate for the position at the time of posting. Actual compensation will be dependent on factors, including but not limited to, the individual’s qualifications, experience, knowledge, skills, and abilities as well as physical work location within the state.

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The approximate pay range for Los Angeles Metro Area and Orange County, CA is $28.53 - $42.80. Please note that the pay range provided is a good faith estimate for the position at the time of posting. Actual compensation will be dependent on factors, including but not limited to, the individual’s qualifications, experience, knowledge, skills, and abilities as well as physical work location within the state.

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NOTICE TO THIRD-PARTY AGENCIES:

HNTB does not accept unsolicited resumes from recruiters or agencies. Any staffing/employment agency, person or entity that submits an unsolicited resume to this site does so with the understanding that the applicant's resume will become the property of HNTB. HNTB will have the right to hire that applicant at its discretion and without any fee owed to the submitting staffing/employment agency, person or entity. Staffing/employment agencies who have fee agreements with HNTB must submit applicants to the designated HNTB recruiter to be eligible for placement fees.

Job Type: Regular

Full/Part Time: Full time

Job Category: Administration Group

ReqID: R-23787

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