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60 Mantech Jobs Hiring in California

ManTech

Activity Security Representative

El Segundo, CA · On-site

$91.60K - $153.80K/yr

MANTECH seeks a motivated, career and customer-oriented Activity Security Representative (ASR) - I to join our team in El Segundo, CA. The Activity Security Representative (ASR) - I will leverage ...

ManTech International

Damage Control Expert

San Diego, CA · On-site

$68.60K - $114.10K/yr

MANTECH seeks a motivated, career and customer-oriented Damage Control Expert to join our team working in San Diego, CA. This is an onsite position. The Damage Control SME will work as a trainer on ...

ManTech

Launch Systems Safety Engineer

Lompoc, CA

$116.40K - $194.90K/yr

MANTECH seeks a highly talented and mission-driven Launch Systems Safety Engineer to join our team at Vandenberg Space Force Base (VSFB), CA. The Launch Systems Safety Engineer will help protect our ...

ManTech

SCI Security Specialist

Los Angeles, CA

$97.10K - $161.90K/yr

MANTECH seeks a motivated, career and customer-oriented SCI Security Specialist II to join our team in El Segundo, CA . The SCI Security Specialist's primary function is to serve as a senior security ...

ManTech

Vulcan Missions Operations Manager

El Segundo, CA

$153.80K - $275.80K/yr

MANTECH seeks a highly talented and customer-oriented Vulcan Mission Operations Manager to lead our program team in El Segundo, CA . The Vulcan Mission Operations Manager will help create the future ...

ManTech

Systems Safety Engineer

El Segundo, CA

$128K - $214.40K/yr

MANTECH seeks a motivated and detail-oriented Senior System Safety Engineer to join our team in El Segundo, CA. The Senior System Safety Engineer will help protect our national security while ...

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ManTech Jobs Information

Does ManTech pay people when they’re sick?

Sometimes. Only some people get paid when they’re sick.
42% of people say they wouldn’t get paid if they were sick but scheduled to work.
Based on data from 12 people who took the Breakroom Quiz between December 2024 and April 2026.

At ManTech, are sick days and vacation days separate paid time off?

Only some people have separate paid time off for sick days and vacation.
50% of people say they have to use vacation days when they’re out sick.
Based on data from 10 people who took the Breakroom Quiz between June 2025 and April 2026.

Do people get paid time off at ManTech?

Most people get paid time off work.
100% of people say they get paid time off.
Based on data from 10 people who took the Breakroom Quiz between June 2025 and April 2026.

How easy is it to get time off at ManTech?

Most people find it easy to get time off.
100% of people report it’s easy to get time off.
Based on data from 13 people who took the Breakroom Quiz between December 2024 and April 2026.

How easy is it to take sick days at ManTech?

Most people find it easy to take sick days.
100% of people report that it’s easy to take time off if they are sick.
Based on data from 13 people who took the Breakroom Quiz between December 2024 and April 2026.

Do people at ManTech feel treated with respect by their managers?

Most people feel treated with respect by their managers.
92% of people say they’re treated with respect by their managers.
Based on data from 13 people who took the Breakroom Quiz between December 2024 and April 2026.

Do people at ManTech get to take their breaks without interruption?

Most people get breaks without interruption.
83% of people report that they get to take their breaks without interruption.
Based on data from 12 people who took the Breakroom Quiz between December 2024 and April 2026.

Is it stressful to work at ManTech?

Some people feel stressed out here.
50% of people say they often feel stressed out at work.
Based on data from 12 people who took the Breakroom Quiz between December 2024 and April 2026.

Do people at ManTech recommend working with their team?

Most people recommend working with their team.
77% of people report that they would recommend working with their immediate team to a friend.
Based on data from 13 people who took the Breakroom Quiz between December 2024 and April 2026.

Do people get enough training when they start at ManTech?

Some people didn’t get enough training when they started.
46% of people report they didn’t get enough training when they started working here.
Based on data from 13 people who took the Breakroom Quiz between December 2024 and April 2026.

Do people get support to advance at ManTech?

Only some people are given support to advance their career here.
In the last year, 36% of people report not being given support to advance their career here.
Based on data from 11 people who took the Breakroom Quiz between December 2024 and April 2026.

Do people think ManTech’s headquarters understands what’s happening where they work?

Most people think headquarters doesn’t understand what’s happening where they work.
75% of people think that this employer’s headquarters or owners don’t have a good understanding of what’s really happening where they work.
Based on data from 12 people who took the Breakroom Quiz between December 2024 and April 2026.

Do workers feel well informed about how ManTech is doing?

Most people feel well informed about how the company is doing.
67% of people feel that they are kept well informed about how the company is doing as a whole.
Based on data from 12 people who took the Breakroom Quiz between December 2024 and April 2026.
What are popular cities in California for Mantech jobs?
What are the most popular jobs at Mantech?
What are the most popular categories at Mantech?
What are popular roles in California?
Infographic showing various job openings at Mantech in California as of May 2026, with employment types broken down into 100% Full Time. Highlights an 100% Physical job distribution.
Personnel Security Specialist

Personnel Security Specialist

ManTech International

Los Angeles, CA • On-site

$75.50K - $125.60K/yr

Full-time

Medical, Life, Retirement, PTO

Posted 17 days ago

ManTech rating

8.8

Company rating: 8.8 out of 10

Based on 13 frontline employees who took The Breakroom Quiz

31st of 184 rated software companies

Job description

General information
Requisition #
R67804
Locations
USA-CA-Los Angeles
Posting Date
05/20/2026
Security Clearance Required
TS/SCI
Remote Type
Onsite
Time Type
Full time
Description & Requirements
Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we've been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now-protect and innovate with MANTECH!
MANTECH seeks a motivated, career and customer-oriented Personnel Security Specialist II to join our team in El Segundo, CA.
The Personnel Security Specialist's primary function is to handle personnel security functions in support of the customer's facility and organization. The position will provide "day-today" PERSEC services for Collateral, Sensitive Compartmented Information (SCI) and Special Access Program (SAP) activities.
Responsibilities include but are not limited to:
  • Build and Maintain tracking spreadsheets/databases for customer PERSEC activities.
  • Provide support for the security awareness and education programs.
  • Perform miscellaneous administrative support functions as directed by the contractor site lead and/or the Government Security Representative.
  • Review, track, and monitor security clearance processing activities with appropriate government personnel to achieve appropriate clearance actions.
  • Conduct Defense Central Index of Investigations (DCII), Joint Personnel Access System (JPAS), and SAPNP reviews of candidates being submitted for SAP access.
  • Perform data entry and record checks in the Joint Access Database (JADE) and maintain all customer sponsored personnel access information.
  • Receive and/or transmit classified visit requests as necessary to meet customer needs.

Minimum Qualifications:
  • Bachelor's degree or 4 additional years of experience will be considered in lieu of degree.
  • 6 + years of Personnel Security experience.
  • 4 + years of relevant SCI experience.
  • Must be familiar with security policy/manuals and the appropriate ICDs/JAFANs/DOD Manuals and other guiding policy documents.

Preferred Qualifications:
  • 2+ years of SAP-related experience.

Clearance Requirements:
  • Current Top Secret Clearance with SCI Eligibility.
  • Eligibility for access to Special Access Program Information.
  • Willingness to submit to a polygraph.

Physical Requirements:
  • Must be able to remain in a stationary position 50%.
  • Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
  • Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.
  • Frequently communicates with co-workers, management and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

The projected compensation range for this position is $75,500.00-$125,600.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.
MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.
If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.

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