About this role
Senior Security Engineer
Location: San Antonio, Texas
Work Arrangement:Onsite, Monday–Friday
Employment Type: Direct Hire
Salary Range: $110,000–$120,000 annually
Industry: Information Technology / Network Security
About the Role
Our client is seeking a Senior Security Engineer to support its growing infrastructure team in San Antonio. This individual will lead the implementation, configuration, design, and administration of security technologies, including Cisco ASA firewalls, intrusion detection and prevention systems (IDS/IPS), and third-party security solutions.
Serving as a subject matter expert for the security environment, the Senior Security Engineer will evaluate network and systems architecture for vulnerabilities, monitor internal and external threats, and collaborate with networking, server, and other business teams to strengthen the organization's security posture.
Key Responsibilities
- Design, implement, configure, and administer security technologies, including Cisco ASA firewalls, IDS/IPS environments, and third-party security solutions.
- Establish and implement security best practices across network and systems infrastructure.
- Serve as the subject matter expert for security technologies, architecture, and operational practices.
- Evaluate network architecture, hardware, software configurations, and systems for security vulnerabilities.
- Monitor internal and external threats and support efforts to identify and mitigate security risks.
- Collaborate with network and server teams to secure infrastructure, systems, and applications.
- Work with business units and other departments to address security requirements and improve protection across the environment.
- Provide technical guidance and security recommendations to relevant stakeholders and executive management.
- Support the integration and administration of security products and technologies.
- Help maintain secure, reliable, and resilient infrastructure through ongoing assessment and improvement.
Required Qualifications
- Higher education degree or at least 7 years of related experience across networking, systems, and security.
- At least 5 years of experience in information security technology.
- Strong Cisco networking background.
- Solid load balancing experience.
- Strong knowledge and hands-on experience with Cisco ASA firewalls.
- Experience with DNS and Microsoft environments.
- Understanding of firewalls, proxies, antivirus technologies, and intrusion detection and prevention systems (IDPS).
- Ability to work collaboratively with infrastructure teams, business units, and management.
Preferred Qualifications
- CISSP, GSEC, or CISM certification.
- Experience with Security Information and Event Management (SIEM) technologies.
- Additional experience integrating and administering third-party security products.
What We're Looking For
The ideal candidate is an experienced security professional with strong Cisco expertise, practical infrastructure knowledge, and the ability to serve as a trusted security resource. This individual should be comfortable identifying vulnerabilities, recommending improvements, and working across technical teams to implement effective security practices.
Systems Engineer
Location: San Antonio, TX
Work Arrangement: Onsite, Monday-Friday
Employment Type: Direct Hire
Salary: $90,000 annually
Industry: Information Technology / Enterprise Infrastructure
About the Role
Our client is seeking an experienced Systems Engineer to manage and maintain enterprise server infrastructure, Microsoft technologies, and virtual desktop environments. This role is responsible for Active Directory, Group Policy, Windows Server, Exchange, SCCM, and VMware Horizon, while providing Tier 3 technical support and leading infrastructure-related projects. The ideal candidate has strong enterprise systems administration and engineering experience, excellent troubleshooting skills, and the ability to collaborate with technical teams, vendors, and business stakeholders.
Key Responsibilities
- Manage and maintain Active Directory, Group Policy Objects (GPO), Windows Server, AD Proxy, and Windows security.
- Install, configure, and maintain Active Directory, domain services, and Group Policy environments.
- Design and engineer virtual infrastructure solutions, including virtual machine clustering.
- Administer Exchange 2016 and messaging systems.
- Support and deploy Microsoft System Center Configuration Manager (SCCM).
- Provide Tier 3 engineering support across enterprise environments.
- Administer VMware Horizon virtual desktop infrastructure (VDI).
- Lead technical projects involving the design and review of new server systems and business applications.
- Analyze and resolve complex enterprise hardware and software issues in collaboration with peer teams and vendors.
- Monitor system performance, respond promptly to critical alerts, and escalate incidents when necessary.
- Support backup and disaster recovery strategies for virtual environments.
- Implement security and Group Policy best practices in accordance with organizational policies.
- Document technical issues, resolutions, configurations, and system processes.
- Provide technical guidance and support to junior staff as needed.
Required Qualifications
- Bachelors degree in Computer Science.
- 5+ years of experience with server hardware, operating systems, software installation, and configuration.
- 5+ years of systems administration and engineering experience in an enterprise environment.
- 5+ years of experience working with Active Directory, Exchange, and SCCM.
- Experience working in Windows Server 2012 environments.
- Expert-level knowledge of DNS, DHCP, DFS, and Active Directory Federation Services (AD FS).
- Working knowledge of Storage Area Network (SAN) infrastructure and configuration supporting virtual systems.
- Experience supporting backup and disaster recovery strategies for virtual environments.
- Strong understanding of security policies and Group Policy implementation.
- Experience documenting technical issues, resolutions, configurations, and processes.
- Strong troubleshooting, analytical, and problem-solving skills.
- Ability to communicate effectively with engineering teams and application business owners.
- Ability to prioritize and execute tasks in a fast-paced environment.
What We're Looking For
The ideal candidate is a technically strong systems engineer who can independently troubleshoot complex enterprise infrastructure issues, maintain secure and reliable systems, and contribute to infrastructure design and implementation projects. This individual should be comfortable providing advanced technical support, coordinating with vendors, and guiding junior team members when needed.