Security Engineer

The application window is expected to close on: 09/11/2026 Job posting may be removed earlier if the position is filled or if a sufficient number of applications are received . Meet the Team Acacia (part of Cisco) is a market leader in high-speed coherent optical transceivers, pioneering technology that powers the world’s hyperscale data centers. The internal Acacia IT team is focused on the exciting challenge of architecting, building, and maintaining the infrastructure that allows our engineers to connect people and systems across the globe. We are a collaborative, high-energy group that thrives on innovation, and as the demands of our business grow, so does our need for proactive security leadership. We value technical curiosity and a "security-first" approach that balances robust protection with the agility required in a fast-paced technology environment.

As a Security Engineer on the Acacia IT Operations team, you will drive day-to-day security operations (focusing on identity security, vulnerability management, and endpoint protection) to ensure a resilient security posture for our global operations. You will manage the vulnerability lifecycle and triage security alerts to mitigate threats in real-time. By partnering with Infrastructure and Network teams, you will enhance Privileged Access Management (PAM) processes to protect our sensitive data. You will also develop and refine security runbooks and operational procedures to ensure consistent, repeatable security standards across all sites. This role is critical in safeguarding our the technology at the forefront of our business, ensuring that our security measures evolve alongside our rapid business growth. Minimum Qualifications & Experience Bachelors degree and 5 years of professional experience in security operations, infrastructure security, or identity management. Management of the end-to-end vulnerability lifecycle, including scanning, tracking, and verifying remediation. Administration of Active Directory environments, including the management of group policies and access control hygiene. Triage and response to security incidents using SIEM, EDR, or similar monitoring platforms. Creation and maintenance of technical security runbooks or operational procedures. Preferred Qualifications & Experience Use endpoint security platforms (e.g., CrowdStrike, SentinelOne) to monitor, harden, and maintain the security health of servers and workstations. Implement vulnerability management campaigns using tools like Tenable or Rapid7 to track, report, and drive remediation progress across cross-functional teams. Implement and manage DNS security strategies using platforms like Cisco Umbrella or Zscaler to mitigate network-level threats. Analyze logs and security events within platforms like Splunk to identify, triage, and escalate potential security incidents effectively. Apply data classification and Data Loss Prevention (DLP) strategies to identify and protect critical information across enterprise environments. Why Cisco?  At Cisco, we’re revolutionizing how data and infrastructure connect and protect organizations in the AI era – and beyond. We’ve been innovating fearlessly for 40 years to create solutions that power how humans and technology work together across the physical and digital worlds. These solutions provide customers with unparalleled security, visibility, and insights across the entire digital footprint. Fueled by the depth and breadth of our technology, we experiment and create meaningful solutions. Add to that our worldwide network of doers and experts, and you’ll see that the opportunities to grow and build are limitless. We work as a team, collaborating with empathy to make really big things happen on a global scale. Because our solutions are everywhere, our impact is everywhere.  We are Cisco, and our power starts with you.  Message to applicants applying to work in the U.S. and/or Canada: The starting salary range