Cyber Security Engineer - TS/SCI Clearance Required

2026 Cyber Security Engineer job ad for a full-time position in San Antonio, TX, United States, requiring TS/SCI clearance, working for Maximus on federal cybersecurity and defense projects.

General information Job Posting Title Cyber Security Engineer Date Thursday, April 16, 2026 City San Antonio State TX Country United States Working time Full-time Description & Requirements
Maximus is a trusted federal partner supporting mission‑critical programs across national security, defense, and public service delivery. Recent contract awards in cybersecurity and operational readiness underscore Maximus’ role as a reliable prime for high‑impact government missions. Joining Maximus means contributing to meaningful work in fast‑paced environments alongside professionals committed to service, accountability, and results.


This position is contingent upon contract award and position availability. Selected candidates will receive a contingent offer of employment, which will become final only upon successful contract award to Maximus, availability of the position, and receipt of authorization to proceed.


This position is onsite five days a week in San Antonio, TX, and requires a TS/SCI security clearance.
Maximus TCS (Technology and Consulting Services) Internal Job Profile Code: TCS051, T3, Band 6
Job-Specific Essential Duties and Responsibilities:
- Implements and maintains cybersecurity controls supporting JCC2 operational systems.
- Conducts risk assessments, vulnerability scans, and threat analysis activities.
- Performs security testing and validation to identify and mitigate system vulnerabilities.
- Investigates and responds to cybersecurity incidents and security events.
- Develops remediation actions and supports incident recovery activities.
- Maintains security documentation, playbooks, and reporting artifacts.
- Ensures compliance with DoD cybersecurity policies, RMF, and security standards.
- Supports system accreditation and security assessment activities.
- Collaborates with engineering and operations teams to improve system security posture.
- Participates in Agile program increment (PI) planning and activities requiring periodic travels.


Job-Specific Minimum Requirements:
- Active TS/SCI clearance is required.
- Bachelor’s degree in Cyber Security, Information Technology, Computer Science, or related field.

- Must be able to report on-site in San Antonio, TX up to five days per week based on customer requirements.

- IAT Level II certification required.

- 5 years experience with DoD cybersecurity policies and frameworks (RMF, NIST, ISO 27001, CIS Controls, DISA STIGs).
- 5 years experience with security technologies (firewalls, IDS/IPS, SIEM, endpoint protection).
- 5 years experience securing network protocols, operating systems, and databases.
- 5 years experience scripting for automation and reporting (Python, PowerShell, or Bash).


Preferred Skills and Qualifications:
- Certified Information Systems Security Professional (CISSP).
- Certified Ethical Hacker (CEH).
- Certified Information Security Manager (CISM).
- Offensive Security Certified Professional (OSCP) IAT Level III.
- Experience supporting DoD DevSecOps environments.
- Experience supporting accredited classified systems.
- Experience performing incident response and forensic analysis.


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Minimum Requirements TCS051, T3, Band 6 EEO Statement Maximus is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, age, national origin, disability, veteran status, genetic information and other legally protected characteristics. Pay Transparency Maximus compensation is based on various factors including but not limited to job location, a candidate's education, training, experience, expected quality and quantity of work, required travel (if any), external market and internal value analysis including seniority and merit systems, as well as internal pay alignment. Annual salary is just one component of Maximus's total compensation package. Other rewards may include short- and long-term incentives as well as program-specific awards. Additionally, Maximus provides a variety of benefits to employees, including health insurance coverage, life and disability insurance, a retirement savings plan, paid holidays and paid time off. Compensation ranges may differ based on contract value but will be commensurate with job duties and relevant work experience. An applicant's salary history will not be used in determining compensation. Maximus will comply with regulatory minimum wage rates and exempt salary thresholds in all instances. Accommodations
Maximus provides reasonable accommodations to individuals requiring assistance during any phase of the employment process due to a disability, medical condition, or physical or mental impairment. If you require assistance at any stage of the employment process—including accessing job postings, completing assessments, or participating in interviews,—please contact People Operations at applicantaccom@maximus.com. Minimum Salary $ 125,000.00 Maximum Salary $ 144,000.00