Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Sr. Administrative Assistant

$26 - $42 per hour

Thermo Fisher Scientific

Work Schedule
Standard (Mon-Fri)

Environmental Conditions
Office

Job Description

As part of the Thermo Fisher Scientific team, you'll discover meaningful work that makes a positive impact on a global scale. Join our colleagues in bringing our Mission to life every single day to enable our customers to make the world healthier, cleaner and safer. We provide our global teams with the resources needed to achieve individual career goals while helping to take science a step beyond by developing solutions for some of the world's toughest challenges, like protecting the environment, making sure our food is safe or helping find cures for cancer.

LOCATION : On-site West Hills, CA. Relocation assistance is NOT provided.

  • Must be legally authorized to work in the United States without sponsorship.
  • Must be able to pass a comprehensive background check, which includes a drug screening.
DESCRIPTION :
Join us as a Senior Administrative Assistant providing high-level support to executive leadership at Thermo Fisher Scientific. You'll contribute to our mission of making the world healthier, cleaner and safer by managing complex calendars, coordinating travel, facilitating communications, and ensuring effective office operations.

In this role, you'll work closely with senior leaders, handling confidential information with discretion while demonstrating exceptional organizational abilities and attention to detail. You'll coordinate meetings and events, prepare professional communications and presentations, manage expenses and vendor relationships, and serve as a key liaison between executives and internal/external stakeholders. Your thoughtful approach and ability to anticipate needs will help drive operational excellence across the organization.

REQUIREMENTS :

Education :
  • High school diploma required. Associate's degree in Secretarial Science, Business, or related field preferred.
Experience :
  • 4+ years of executive administrative assistant or site administrator experience in a professional office environment.
  • 3+ years supporting Director, senior level leaders or functional heads.
  • Experience in a large, global matrix organization strongly preferred.
  • Proficiency in Microsoft Office Suite (Outlook, PowerPoint, Excel, Word, Teams)
  • Experience supporting internal communications, events, or workplace operations is a plus.
Knowledge, Skills, Abilities:
  • Strong organizational, analytical, and communication skills with an ability to anticipate what needs to be completed.
  • Experience with internal communications tools, digital signage systems, or intranet platforms (preferred).
  • Excellent written and verbal communication skills. Infallible proof reading and spelling.
  • High level of discretion when handling sensitive or confidential information.
  • Ability to manage multiple priorities and meet deadlines in a fast-paced, matrixed environment.
  • Creative problem-solver with an eye for detail and continuous improvement.
  • Ability to work autonomously while supporting leaders across the site.
  • Flexible and adaptable, with the ability to respond to last-minute changes while maintaining poise and a positive "can do" outlook.
We offer competitive remuneration, annual incentive plan bonus scheme, healthcare, company 401k, and a range of employee benefits! Thermo Fisher Scientific offers employment with an innovative, forward-thinking organization, and outstanding career and development prospects. We offer an exciting company culture that stands for integrity, intensity, involvement, and innovation.


Thermo Fisher Scientific is an EEO/Affirmative Action Employer and does not discriminate based on race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability, or any other legally protected status. We will ensure that individuals with disabilities are provided a reasonable accommodation to participate in the job application or interview process, to perform critical job functions, and to receive other benefits and privileges of employment. Please contact us to request an accommodation.

Compensation and Benefits
The hourly pay range estimated for this position based in California is $26.00-$42.00.

This position may also be eligible to receive a variable annual bonus based on company, team, and/or individual performance results in accordance with company policy. We offer a comprehensive Total Rewards package that our U.S. colleagues and their families can count on, which includes:
  • A choice of national medical and dental plans, and a national vision plan, including health incentive programs
  • Employee assistance and family support programs, including commuter benefits and tuition reimbursement
  • At least 120 hours paid time off (PTO), 10 paid holidays annually, paid parental leave (3 weeks for bonding and 8 weeks for caregiver leave), accident and life insurance, and short- and long-term disability in accordance with company policy
  • Retirement and savings programs, such as our competitive 401(k) U.S. retirement savings plan
  • Employees' Stock Purchase Plan (ESPP) offers eligible colleagues the opportunity to purchase company stock at a discount

For more information on our benefits, please visit:
Vacancy posted 1 day ago
Similar jobs that could be interesting for youBased on the Sr. Administrative Assistant in Los Angeles, CA vacancy
  •  ...Sr Administrative Assistant The Senior Administrative Assistant will provide high-level administrative and operational support to multiple senior leaders. This position requires strong organizational skills, discretion, and the ability to manage competing priorities... 
    Senior
    Work at office
    Flexible hours

    NBCUniversal

    North Hollywood, CA
    16 hours ago
  • $31.73 - $48.27 per hour

     ...Sr. Administrative Assistant We are hiring for a Sr. Administrative Assistant to support the Co-Heads, Global Strategic Marketing & Research, and Head of Marketing Analytics & Insights with daily administrative and project support. Responsibilities Scheduling... 
    Senior
    Flexible hours

    Sony Pictures Entertainment

    Culver City, CA
    16 hours ago
  • $66k - $83.2k

     ...Sony Pictures Entertainment is seeking a highly organized, proactive, and resourceful Senior Administrative Assistant to support senior leaders within the Production & Studio Technology Services (PSTS) and Enterprise Intelligence Platform (EIP) functions of the Information... 
    Senior
    Work at office

    Sony Pictures

    Culver City, CA
    16 hours ago
  • $52.73k - $70.3k

     ...Sr. Administrative Assistant Locations: Los Angeles, California Job Category: Administrative / Clerical Position Type: Full-Time Shift: Days Job Description Join a team that's shaping the future of pediatric care. Children’s Hospital Los... 
    Senior
    Full time
    Work at office
    Local area
    Monday to Friday
    Shift work

    Children's Hospital Los Angeles

    Los Angeles, CA
    4 days ago
  •  ...Sr. Administrative Assistant The Arizona College of Optometry is seeking a highly organized and proactive Sr. Administrative Assistant to coordinate programs and events that support continuing education (CE), student career development, faculty engagement, admissions... 
    Senior
    Work experience placement
    Afternoon shift

    Midwestern University

    Glendale, CA
    3 days ago
  • $28.85 - $39.42 per hour

     ...Sr. Administrative The Sr. Administrative provides high-volume, detail-oriented administrative support to two executives across Digital Marketing...  .... In addition to core executive support, this role will assist with project work within the Digital Marketing Team,... 
    Senior
    Traineeship
    Internship
    Work at office
    Flexible hours
    Shift work

    Sony Pictures Entertainment

    Culver City, CA
    1 day ago
  •  ...Sr. Administrative Assistant - AZ - College of Dental Medicine Job Category: Staff Requisition Number: SRADM004429 Posted: June 22, 2026 Full-Time Arizona Campus Glendale, AZ 85308, USA Description Summary The Senior Administrative Assistant provides... 
    Senior
    Full time
    Temporary work
    Part time
    Work experience placement
    Work at office
    Local area
    Flexible hours

    Midwestern University

    Glendale, CA
    1 day ago
  • $32 - $40 per hour

     ...Company, a subsidiary of Tokyo-based Sony Group Corporation. Sony Pictures Television is seeking a highly organized, proactive Sr Administrative Assistant to support executives within the Comedy Development teams. This role is ideal for someone who thrives in a fast-paced... 
    Senior
    Full time
    Work at office
    Worldwide

    Sony Pictures Entertainment

    Culver City, CA
    1 day ago
  • $70k - $90k

     ...develop a talented workforce to create and deliver a wide range of content reflecting our world. Job Description The Senior Administrative Assistant will provide high-level administrative and operational support to multiple senior leaders. This position requires strong... 
    Senior
    Hourly pay
    Full time
    Contract work
    Work at office
    Local area
    Flexible hours

    NBCUniversal

    Los Angeles, CA
    19 hours ago
  •  ...Scheduler - Sr. Customer Service Rep/ Patient Access Liaison II Location: Los Angeles, CA - 90033 Duration: 13-week contract,...  ...appoint scheduling, registration, insurance verification, medical assistant. Associate or bachelor's degree in healthcare, business or... 
    Senior
    Contract work
    Casual work
    Work at office
    Shift work
    Weekend work

    Artech

    Los Angeles, CA
    3 days ago
  • $125k - $161k

     ...Job Title Sr Administrative Associate Functional Title Executive Assistant Contract position State Location Los Angeles - Los Angeles Air Force Base, CA US (Primary) Education Master's Degree Job Type Full-time Job Description Quantech... 
    Senior
    Full time
    Contract work
    Work at office

    Quantech Services

    Los Angeles, CA
    5 days ago
  • $25 - $28 per hour

     ...Title : Administrative Assistant (Senior Level) Department : Hospitality & Private Events Reports To : Vice President of Hospitality and Private Events FLSA Status : Non-Exempt Compensation : $25 - $28 per hour SUMMARY The Administrative Assistant... 
    Senior
    Hourly pay
    Work at office
    Weekend work
    Afternoon shift

    Skirball Cultural Center

    Los Angeles, CA
    3 days ago
  •  ...interesting colleagues and the satisfaction of supporting our communities. Together, there's no stopping you! Job Title:Senior Administrative AssistantJob Description: Summary: Works as a team with other administrative staff to support activities for the Senior... 
    Senior
    Work at office
    Local area

    Enterprise Bank & Trust

    Glendale, CA
    5 days ago
  •  ...Cedars-Sinai Anesthesiology Academics Senior Administrative Assistant Cedars-Sinai Medical Center has been named to the Honor Roll in U.S. News & World Report's "Best Hospitals 2025-2026" rankings. When you join our team, you'll gain access to our groundbreaking biomedical... 
    Senior
    Full time
    Work experience placement
    Work at office

    Cedars-Sinai

    Los Angeles, CA
    2 days ago
  • Job Title Job description goes here. If there is no job description, just print the job title provided above. Quantech Services Inc.
    Senior

    Quantech Services Inc.

    Los Angeles, CA
    18 hours ago
  • $57k - $65k

     ...Senior Administrative Assistant Gelfand, Rennert & Feldman is seeking a Senior Administrative Assistant ideally with financial services exposure to join our team of dedicated professionals. This position is based in-office out of Century City, CA on a full-time basis... 
    Senior
    Full time
    Work experience placement
    Work at office
    Remote work

    Focus Financial Partners Inc.

    Los Angeles, CA
    5 days ago
  •  ...Job Summary: The Senior Administrative Assistant's primary role is to support the ICANN executive, as well as their direct reports as assigned. Ensures effective and efficient functioning of the department while maintaining confidentiality and commitments on the... 
    Senior
    Work experience placement
    Work at office
    Local area
    Remote work

    ICANN

    Los Angeles, CA
    3 days ago
  • Payfuture Technologies is seeking a Senior Administrative Assistant to provide high-level administrative support at their Glendale, California office. The role requires a proactive individual who can manage calendars, coordinate meetings, and assist with budget preparation... 
    Senior
    Work at office

    Payfuture Technologies

    Glendale, CA
    3 days ago
  • Nike Inc. is seeking a Senior Administrative Assistant to support the VP of Brand Creative Marketing and Sr. Director of Brand Marketing. The role involves complex calendar management, travel booking, and preparation of expense reports. Ideal candidates should have a Bachelor... 
    Senior

    Nike Inc.

    Los Angeles, CA
    2 days ago
  •  ...OR Administration Senior Administrative Assistant Grow your career at Cedars-Sinai! Cedars-Sinai Medical Center has been named to the Honor Roll in U.S. News & World Report's "Best Hospitals 2025-2026" rankings. When you join our team, you'll gain access to our groundbreaking... 
    Senior
    Work at office

    Cedars Sinai

    Beverly Hills, CA
    5 days ago
  • $35 - $40 per hour

     ...Administrative Assistant IV Pacific Pros is seeking an Administrative Assistant IV for Construction Projects to be a representative for Los Angeles World Airport (LAWA). The Administrative Assistant IV will provide comprehensive administrative support to the project... 
    Senior
    Hourly pay
    Full time
    Contract work
    For contractors
    Work at office
    Local area
    Immediate start
    Shift work

    Pacific Pros

    Los Angeles, CA
    3 days ago
  •  ...Senior Administrative Assistant Grow your career at Cedars-Sinai! Cedars-Sinai Medical Center has been named to the Honor Roll in U.S. News & World Report's "Best Hospitals 2025-2026" rankings. When you join our team, you'll gain access to our groundbreaking biomedical... 
    Senior
    Work at office

    Cedars Sinai

    Los Angeles, CA
    1 day ago
  • About the Company The company is a real estate advisory and construction management firm serving public and private sector clients throughout Southern California. The firm is known for its highly credentialed team of engineers, project managers, and construction professionals...
    Senior
    Contract work
    For contractors
    Work at office
    Immediate start

    Kimmel and Associates

    Los Angeles, CA
    6 days ago
  • $26.59 per hour

    Senior Administrative Assistant - Brand Marketing The hourly rate for this position ranges from $26.59 in our lowest geographic market to $52.50...  ...Assistant, you will support the VP of Brand Creative Marketing NA & Sr. Director Brand Marketing. WHO WE ARE LOOKING FOR We’re... 
    Senior
    Hourly pay
    Temporary work
    Work experience placement
    Work at office

    Nike Inc.

    Los Angeles, CA
    3 days ago
  •  ...Senior Administrative Assistant Reports to: Director, Clinical Training and Administration Program: 1303- FSP Department: Mental Health Location: Westside Mental Health Office - 1749 14th Street, Santa Monica, CA 90404 Setting: 100% Onsite Schedule: Monday... 
    Senior
    Permanent employment
    Full time
    Temporary work
    Interim role
    Work at office
    Monday to Friday
    Flexible hours

    The People Concern

    Santa Monica, CA
    1 day ago
  • $32 - $35 per hour

    We are looking for an Executive Assistant for a top media & entertainment company out of their Burbank, CA offices! This role is supporting...  ...Responsibilities: • Provide high caliber general administrative support to EVP, CTO - Studio Technology & Operations. • Fully... 
    Senior
    Hourly pay
    Freelance
    Flexible hours

    Solomon Page

    Burbank, CA
    5 days ago
  • Jacobs is seeking an experienced individual for project controls, focusing on scheduling and cost management in Los Angeles, California. You will lead the development and analysis of project schedules and execute cost control processes. The ideal candidate will have over...
    Senior
    Full time

    Jacobs

    Los Angeles, CA
    2 days ago
  • $132k - $143k

    A construction management firm is seeking a full-time Scheduler to support project management in Los Angeles, CA. The ideal candidate will have at least three years of experience in scheduling for public works projects, proficiency in Primavera and MS Office, and excellent...
    Senior
    Full time

    Pacificaservices

    Los Angeles, CA
    5 days ago
  • $135k - $140k

     ...benefits may include extensive medical, disability and life insurance coverage, continuing education benefits, paid time off, employee assistance program and a retirement savings plan with company matching contributions. We encourage all candidates to explore our total... 
    Senior
    For contractors
    Local area

    Tylin

    Los Angeles, CA
    14 days ago
  • $95.5k - $128k

     ...Sr. Executive Assistant- Disney Entertainment, Corporate Planning & Transformation Do you have deep experience supporting a very high-level executive? Are you known for keeping your cool under pressure? Can you interact with the most senior levels of management? If... 
    Senior
    Work at office

    Disney

    Burbank, CA
    13 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Sr. Administrative Assistant. Be the first to apply!