Top 20 Systems administration endpoint engineering Jobs in San Antonio, Tx

Senior ISSE (Trellix/HBSS focus)
Amentum —San Antonio, TX
- $145,000 - $175,000 a year
- Overtime
- Microsoft Outlook
- System design
- Windows
- Health savings account
- Employee stock purchase plan
Quick Apply
Systems Administration Endpoint Engineering
Alpha Omega Integration —San Antonio, TX
- $88,000 - $113,785 a year
- Azure
- Computer Science
- Bachelor of Science
- Health savings account
- Paid holidays
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IT SPECIALIST - SR. IT SPECIALIST - Microsoft Windows & VMWare Engineering
Southwest Research Institute —San Antonio, TX
- Azure
- 6 years
- Mid-level
Endpoint Engineer - System Administrator
BUSINESS ENABLED ACQUISITIONandTECHNOLOGY Inc —San Antonio, TX
- Full-time
- Computer Science
- Military
- Bachelor of Science
Quick Apply
Security Analyst III (Immediate Opening)
San Antonio Independent School District —San Antonio, TX
- $53,629 - $65,004 a year
- Urgently hiring
- Background check
- Research
- Mid-level
13d
CIS Administrator
BGE, Inc —San Antonio, TX
- Mid-level
- Windows
- Bachelor's degree
- Health savings account
- Paid holidays
Quick Apply
Microsoft 365 Security Consultant
Deloitte —San Antonio, TX
- $82,600 - $162,800 a year
- Full-time
- Computer Science
- Up to 50% travel
- Bachelor of Science
Research & Development Advanced - Endpoint En
BUSINESS ENABLED ACQUISITIONandTECHNOLOGY Inc —San Antonio, TX
- Full-time
- Azure
- Computer Science
- Military
Quick Apply
Journeyman Telecommunications Engineering Specialist
BRS —San Antonio, TX
- $88,000 - $93,000 a year
- Full-time
- Customer service
- Senior level
- 2 years
- Profit sharing
- Paid holidays
9d
Virtualization Engineer III
IPSecure, Inc. —Lackland AFB, TX
- $80,000 - $100,000 a year
- Computer Science
- Windows
- 8 years
- Paid holidays
- Health insurance
Quick Apply
Project Manager Contract Manager Level IV
FEDITC LLC —San Antonio, TX
- Full-time
- Background check
- Research
- Office
Quick Apply
Enterprise Architect - Endpoint Management
Alpha Omega Integration —San Antonio, TX
- $130,000 - $160,000 a year
- Azure
- Computer Science
- Bachelor of Science
- Health savings account
- Paid holidays
Quick Apply
Senior Infrastructure Engineer
Alterman Management Group, Inc —Live Oak, TX
- Overtime
- Computer science
- Computer Science
- Construction site
Quick Apply
Information System Security Engineer (ISSE) – Risk Management Framework (RMF), AWS, ACAS, Splunk
San Antonio, TX
- Azure
- Computer Science
- Bachelor of Science
Principal/Sr Principal Network Engineer
Northrop Grumman —San Antonio, TX
- $94,200 - $176,300 a year
- Overtime
- Schematics
- Master's degree
- Doctor of Philosophy
- Paid holidays
- Disability insurance
3d
Lead Sales Engineer
Bridgehead IT LLC —San Antonio, TX
- Full-time
- Computer science
- Azure
- Computer Science
Quick Apply

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Level 3 Engineer - Managed Services Provider
EasyIT —Dublin, OH
Familiarity with service ticketing and remote monitoring/management tools. Leveraging service ticketing systems and RMM tools to keep workflows efficient.
$60,000 - $90,000 a year
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2d
IT Systems Engineer
HBD Industries —Dublin, OH
Strong customer service mindset with the ability to translate technical concepts for non‑technical users. This role is designed for an individual transitioning…

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Senior ISSE (Trellix/HBSS focus)

Amentum -
San Antonio, TX

Quick Apply

Job Details

Full-time
$145,000 - $175,000 a year

Benefits

Health savings account
Employee stock purchase plan
Health insurance
Dental insurance
401(k)
Flexible spending account
Tuition reimbursement
Paid time off
Parental leave
Employee assistance program
Vision insurance
401(k) matching
Referral program

Qualifications

Vulnerability scanning implementation
Secret Clearance
Nessus
IAT Level III
Bachelor's degree
Splunk
Log analysis tools
Vulnerability management
IAT
IAT Level II
Vuls
SDLC

Full Job Description

Job DescriptionJob Description

In support of a challenging, critical, and rewarding program that provides integrated voice, video, and data services throughout the Information Technology lifecycle, Amentum is seeking Senior Information System Security Engineer (ISSE) to serve as a subject matter expert in the design, implementation, and optimization of enterprise security toolsets. The successful candidate will lead the engineering efforts for the Trellix (ePO) ecosystem and the ACAS (Nessus) suite, ensuring mission-critical assets remain secure, compliant, and resilient. This role requires a blend of high-level security architecture, hands-on troubleshooting, and the ability to drive secure-by-design principles across the System Development Life Cycle (SDLC). You must be a critical thinker, have a strong work ethic, and be able to work independently or as a member of a team in a dynamic environment. We value candidates who are detail-oriented while also being able to think and react quickly to emerging and unique problem sets. To be successful, you must be able to rapidly adapt and learn how to operate the front and back end of new products and processes.

Work Schedule:

5 Days (Mon – Fri); 8 hrs/Day; 40 hrs/wkly

Essential Responsibilities:

The duties and responsibilities of the Senior Information Systems Security Engineer include, but are not limited to the following:

Endpoint Security Engineering (Trellix/ePO)
Ecosystem Management: Expertly design, configure, and maintain Trellix components (ePO, Trellix Agent, DLP, HIPS, Policy Auditor, ABM, and VSE) across Windows and Linux environments.
Policy Development: Author and deploy endpoint security policies for ENS modules (Threat Prevention, Firewall, Web Control) based on DISA STIGs and organizational needs.
Threat Mitigation: Develop custom signatures, rules, and exceptions to address zero-day threats and specific operational requirements.
Operational Continuity: Validate custom exceptions to ensure uninterrupted operation of mission-critical processes without compromising compliance.
Vulnerability Management (ACAS/Nessus)
Architecture & Strategy: Design enterprise-wide vulnerability scanning strategies and manage the deployment of Security Centers and Nessus scanners.
Advanced Troubleshooting: Serve as the final escalation point for complex scan issues, credentialing problems, and system communication failures.
Risk Reporting: Configure automated reporting of compliance data to continuous monitoring systems and risk-scoring repositories.
Security Integration & Engineering
Tool Orchestration: Integrate Trellix and ACAS with tools such as Splunk, XSOAR, and ServiceNow to automate workflows and enhance incident response.
RMF Support: Provide authoritative recommendations and ACAS-generated artifacts to support the Assessment and Authorization (A&A) process and RMF packages for Authority to Operate (ATO).
Strategic Oversight: Lead the maintenance and scalability of test, development, and operational environments, collaborating with Network and DevSecOps teams to enhance resilience.
Multi-Tier Support: Deliver Tier 1–3 maintenance and incident response for the full cybersecurity portfolio (ACAS, Trellix, Splunk, XSOAR).
Compliance Mastery: Deep understanding of DISA STIGs, NIST 800-53, and the Risk Management Framework (RMF).

Minimum Requirements:

Must have active Top-Secret clearance with SCI or TS with the ability to acquire SCI
Knowledge and experience with NESSUS/ACAS and Trellix administration
Experience in Splunk role while working in a Splunk Clustered Environment
Must be able to work a 40-hour work week, normally Monday through Friday.
Ability to work overtime during critical peaks and be available to meet last-minute requests for overtime if needed.
Ability to travel (5-10%) primarily within 75 miles.
Familiarity with MS Office applications such as Excel, Word, Outlook, SharePoint, Project, and Visio.
Exceptional attention to detail; excellent verbal and written communication skills; strong critical thinking, organizational, time-management, and problem-solving skills.    
Ability to work both independently and as part of a team in a dynamic environment.

Clearance Required:

Must have active Top-Secret clearance with SCI or TS with the ability to acquire SCI

Minimum Education:

Bachelor’s Degree in a related field (Cyber and/or Engineering)

Minimum Years of Experience:

8 years of relevant experience

Required Certifications:

Must possess, or be able to obtain, one of the following 8140 IAT Level II or III baseline certifications before a start date:
Level II certifications include – CCNA Security, GISCP, GSEC, Security+ CE, SSCP
Level III certifications include – CASP CE, CCNP Security, CISA, CISSP (or Associate), GCED, GCIH

Preferred Qualifications:

RHEL Administration: Proficient understanding of Red Hat Enterprise Linux (RHEL) 8 and 9, including the ability to monitor and maintain cybersecurity tools at the OS level.
SOAR Automation: Experience managing the full lifecycle of XSOAR infrastructure, including building complex playbooks, custom scripts, and integrations to automate cyber workflows.
Splunk O&M: Proficiency in Splunk Operations & Maintenance, including managing distributed components, index management, version upgrades, and creating custom dashboards via the Monitoring Console.

#INDTech

Job Type: Full-time

Pay: $145,000.00 - $175,000.00 per year

Benefits:

401(k)
401(k) matching
Dental insurance
Employee assistance program
Flexible spending account
Health insurance
Health savings account
Paid time off
Parental leave
Referral program
Tuition reimbursement
Vision insurance

Compensation Package:

Employee stock purchase plan

Education:

Bachelor's (Required)

Experience:

Trellix/HBSS Administration: 10 years (Required)
Tier III Security Support: 10 years (Required)

License/Certification:

IAT Level II (Required)
IAT Level III (Preferred)

Security clearance:

Secret (Required)

Ability to Relocate:

San Antonio, TX 78218: Relocate before starting work (Required)

Work Location: In person

Quick Apply

Refine Your Search

systems administration endpoint engineering jobs in san antonio, tx

Senior ISSE (Trellix/HBSS focus)

Systems Administration Endpoint Engineering

IT SPECIALIST - SR. IT SPECIALIST - Microsoft Windows & VMWare Engineering

Endpoint Engineer - System Administrator

Security Analyst III (Immediate Opening)

CIS Administrator

Microsoft 365 Security Consultant

Research & Development Advanced - Endpoint En

Journeyman Telecommunications Engineering Specialist

Virtualization Engineer III

Project Manager Contract Manager Level IV

Enterprise Architect - Endpoint Management

Senior Infrastructure Engineer

Information System Security Engineer (ISSE) – Risk Management Framework (RMF), AWS, ACAS, Splunk

Principal/Sr Principal Network Engineer

Lead Sales Engineer

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