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60 Mantech Jobs Hiring in California

ManTech

Activity Security Representative

Los Angeles, CA · On-site

$18.25 - $21.50/hr

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

Corrosion Analyst

San Diego, CA

$88.20K - $147.20K/yr

MANTECH seeks a motivated, career and customer-oriented Corrosion Analyst to join our team at SURFMEPP in San Diego, CA. The Surface Maintenance Engineering, Planning, Program (SURFMEPP) maintains ...

ManTech International

Corrosion Analyst

San Diego, CA · On-site

$88.20K - $147.20K/yr

MANTECH seeks a motivated, career and customer-oriented Corrosion Analyst to join our team at SURFMEPP in San Diego, CA. The Surface Maintenance Engineering, Planning, Program (SURFMEPP) maintains ...

ManTech International

Corrosion Analyst

San Diego, CA · On-site

$88.20K - $147.20K/yr

MANTECH seeks a motivated, career and customer-oriented Corrosion Analyst to join our team at SURFMEPP in San Diego, CA. The Surface Maintenance Engineering, Planning, Program (SURFMEPP) maintains ...

ManTech International

Corrosion Analyst

San Diego, CA · On-site

$88.20K - $147.20K/yr

MANTECH seeks a motivated, career and customer-oriented Corrosion Analyst to join our team at SURFMEPP in San Diego, CA. The Surface Maintenance Engineering, Planning, Program (SURFMEPP) maintains ...

ManTech International

Corrosion Analyst

San Diego, CA · On-site

$88.20K - $147.20K/yr

MANTECH seeks a motivated, career and customer-oriented Corrosion Analyst to join our team at SURFMEPP in San Diego, CA. The Surface Maintenance Engineering, Planning, Program (SURFMEPP) maintains ...

ManTech International

Corrosion Analyst

San Diego, CA · On-site

$88.20K - $147.20K/yr

MANTECH seeks a motivated, career and customer-oriented Corrosion Analyst to join our team at SURFMEPP in San Diego, CA. The Surface Maintenance Engineering, Planning, Program (SURFMEPP) maintains ...

ManTech International

Corrosion Analyst

San Diego, CA

$88.20K - $147.20K/yr

MANTECH seeks a motivated, career and customer-oriented Corrosion Analyst to join our team at SURFMEPP in San Diego, CA. The Surface Maintenance Engineering, Planning, Program (SURFMEPP) maintains ...

ManTech International

Corrosion Analyst

San Diego, CA · On-site

$88.20K - $147.20K/yr

MANTECH seeks a motivated, career and customer-oriented Corrosion Analyst to join our team at SURFMEPP in San Diego, CA. The Surface Maintenance Engineering, Planning, Program (SURFMEPP) maintains ...

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Showing results 41-60

All JobsMantech JobsJobs at Mantech in California

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.
Activity Security Representative

Activity Security Representative

ManTech International

Los Angeles, CA • On-site

$91.60K - $153.80K/yr

Full-time

Medical, Life, Retirement, PTO

Posted 3 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 #
R67330
Locations
USA-CA-Los Angeles
Posting Date
04/28/2026
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 Activity Security Representative (ASR) to join our team in El Segundo, CA.
The Activity Security Representative (ASR) will leverage their strong technical background and knowledge to provide multi-disciplined security support to a customer's facility and organization. You will provide day-to-day support for Collateral, Sensitive Compartmented Information (SCI), and Special Access Program (SAP) activities in a full-time, in-office capacity.
Responsibilities include but are not limited to:
  • Conducting classification reviews of inbound and outbound correspondence and maintaining document accountability databases.
  • Processing and destroying classified materials and magnetic media while maintaining daily administrative logs for document control.
  • Assisting in the processing and electronic transfer of data files to internal customers and maintaining extensive point of contact listings.
  • Researching and filing inbound and outbound visit notices and escorting facility visitors while maintaining associated logs.
  • Conducting entry and exit inspections and assisting in the preparation of facility access control badges and entry system maintenance.
  • Performing data entry into personnel security databases and maintaining customer-sponsored billets and quota information.
  • Enforcing customer Standard Operating Procedures and providing support for security awareness and education programs.

Minimum Qualifications:
  • Bachelor's degree in a related field or 4 additional years of experience will be considered in lieu of degree.
  • 2+ years of related experience.
  • 1+ years of experience with SCI programs.
  • Must complete DoD SAPCO approved SAPNP training within six months of starting on the contract if performing SAP personnel security functions.
  • Familiarity with SIMS database or completion of training within six months of hire if performing document control functions.
  • Completion of JPAS/DISS training within six months of hire if performing SCI personnel security functions.
  • Completion of Joint Access Database Environment (JADE) training within six months of hire if performing SAP personnel security functions.

Preferred Qualifications:
  • 1+ years of experience with SAP programs.
  • Familiarity with security policy manuals and other guiding policy documents used in Government contracting environments.
  • Self-starter with excellent people skills-able to work in dynamic environments and interact effectively with DOD, military, and industry partners.
  • Working knowledge of Microsoft Office (Word, PowerPoint, and Excel) and a high degree of initiative requiring minimal supervision.

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%
  • The person in this position frequently communicates with co-workers, management and customers, which may involve delivering presentations.
  • Must be able to exchange accurate information in these situations.
  • Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer

The projected compensation range for this position is $91,600.00-$153,800.00. 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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