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Powering the world's payments ecosystem

ACI powers the payments ecosystem - globally, and you power ACI.  You'll innovate, collaborate, and grow - in an energetic technology culture with decades of proven success.  ACIers - in all roles and levels - are truly your colleagues and many are your friends. Our size and reach allow you to see the global impact of your work. You are visible, your talents are valued, and you are empowered to shape the future of payments.

Job Purpose

The Security Engineer is responsible for implementing, supporting, and maintaining security controls, tools, and processes that protect company systems, networks, and information assets.

This role contributes to day-to-day security engineering and operational activities, including secure configuration, monitoring, alert response, incident support, documentation, and continuous improvement. The position works collaboratively with other technical teams to strengthen security controls and support reliable operational execution.

Essential Functions and Responsibilities

• Implement, administer, and support security controls and technologies used to protect systems, networks, and data.
• Monitor, evaluate, and maintain secured environments through established security tools, processes, and procedures.
• Support investigation and remediation of security alerts, events, and vulnerabilities, and assist with internal security investigations as needed.
• Contribute to documentation, operational procedures, and runbooks to support consistent security operations and incident handling.
• Assist with security audits, evidence gathering, and remediation activities to minimize security risk and support policy compliance.
• Partner with other technical teams to implement secure configurations and support operational improvements.
• Participate in the on-call support rotation for security incidents, including alert triage, investigation support, escalation, and execution of established incident response procedures.
• Perform other duties as assigned and understand and adhere to all corporate policies, including the ACI Code of Business Conduct and Ethics.

ACI is actively expanding the secure use of AI across the enterprise. Successful candidates will demonstrate strong AI fluency, including understanding how generative AI technologies are used in modern software delivery, operations, and security programs, along with the associated risks and control requirements.

Qualifications (Education, Experience, Knowledge, Skills, and Abilities)

• Bachelor's degree or equivalent practical experience.
• 2-4 years of experience in security engineering, security operations, or a related technical discipline.
• Working knowledge of security fundamentals, including access controls, system hardening, encryption concepts, monitoring, and network/security basics.
• Ability to support operational security tasks, respond to alerts, follow documented procedures, and escalate appropriately.
• Certifications may be preferred, but are not required.

Preferred Qualifications

• Experience with SIEM, monitoring, vulnerability management, or endpoint security tools.
• Familiarity with cloud security fundamentals in AWS, Azure, or similar environments.
• Experience contributing to technical documentation, runbooks, or audit evidence collection.
• Certifications may be viewed favorably but are not required for this role.

Work Environment

• Standard work environment.
• Some overtime or after-hours support may be required.
• Participation in an on-call rotation is required to support incident response and urgent security operations activities.
• Travel opportunities may be limited.

Applicants must be currently authorized to work in the United States on a full-time basis. This position does not offer sponsorship for employment visa status or work permit now or in the future.

In return for your expertise, we offer opportunities for growth, career development, and a competitive compensation and benefits package-all within an innovative and collaborative work environment.

Are you ready to help us transform the payments ecosystem? To learn more about ACI Worldwide, visit our web site at www.aciworldwide.com Job ID (Requisition #19146)

ACI Worldwide is an AA/EEO employer in the United States, which includes providing equal opportunity for protected veterans and individuals with disabilities, and an EEO employer globally.

Important Notice About Recruitment Scams
Job seekers should be aware of ongoing recruitment scams where individuals or organizations impersonate legitimate companies to offer fake job opportunities. These scams often involve requests for personal information, payments, or interviews through unofficial channels. Please be cautious and verify any communications claiming to be from our company (www.aciworldwide.com / @aciworldwide.com). The ACI Worldwide recruitment team will always follow official channels and will never request payment.

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ACI Worldwide is a global leader in mission-critical, real-time payments software. Our proven, secure and scalable software solutions enable leading corporations, fintechs and financial disruptors to process and manage digital payments, power omni-commerce payments, present and process bill payments, and manage fraud and risk. We combine our global footprint with a local presence to drive the real-time digital transformation of payments and commerce.