The STO Manager oversees network security manages firewall/VPN changes supports operations and enhances security configurations within an enterprise environment.

Job Overview:
The STO Manager handles technical and operational maintenance for firewall VPN technologies and DNS defense services within the Security Technology Operations (STO) function.
The role is responsible for managing network security changes and driving improvements while contributing to the resolution of network security incidents ensuring timely accurate and Secure outcomes across Arm's enterprise-scale network infrastructure. The role operates with a high degree of autonomy contributing to the stability optimization and continuous improvement of network security services and supporting the delivery of reliable scalable and resilient security outcomes aligned to business needs.
Responsibilities:
Network Change Management

• Lead the intake analysis and execution of firewall / VPN / DNS security change requests via ServiceNow.
• Validate rule requests against security policies standards and design principles.
• Implement and document firewall rules across enterprise and data center environments.
• Coordinate with requestors network engineers and project teams to ensure minimal disruption.
• Track and manage assigned change requests ensuring timely delivery and alignment with agreed priorities.

Operational Support

• Support the day-to-day management of firewall infrastructure and associated tooling (e.g. Cisco ( ASA/FTD or equivalent).
• Conduct troubleshooting and validation testing post-change.
• Identify misconfigurations and make changes to configure for the best security and business enablement.
• Create knowledge base articles process maps and user documentation.
• Find opportunities for automation of repeatable tasks

Engineering & Optimization

• Challenge and validate necessity of rules (not just approve).
• Consider security and performance impact at scale.

Governance and Continuous Improvement

• Identify and raise risks or concerns related to network security configurations ensuring appropriate escalation where required.
• Expected to build or implement automation or process efficiencies.
• Support compliance with internal standards audits and operational procedures.
• Participate in daily huddles contribute on architecture discussions and provide peer review on changes.
• Rule lifecycle management (not just creation) including firewall policy optimization.

Required Skills and Experience:

• Demonstrable experience managing enterprise firewall technologies (e.g. Palo Alto Cisco or equivalent).
• Solid understanding of networking fundamentals (TCP/IP routing VPNs NAT subnets).
• Experience using ServiceNow or similar platforms for change and request management.
• Familiarity with ITIL processes (Incident Request Change).
• Exposure to network security operations within an enterprise environment.
• Experience with scripting or automation (e.g. Python APIs) Core Functional Capabilities
• Experience managing network security
• Good understanding of technical security controls (firewalls VPN DNS).
• Technologies including risks issues and changes to ensure secure and reliable operations.
• Ability to implement low-level changes while supporting more complex tasks.
• Finds opportunities to improve efficiency and reduce technical debt.
• Applies practical experience alongside formal knowledge to solve operational challenges.
• Demonstrates strong independent decision-making and sound technical judgement in time-sensitive or low-support scenarios.

Accommodations at Arm
At Arm we want our people to Do Great Things. If you need support or an accommodation to Be Your Brilliant Self during the recruitment process please email [email protected]. To note by sending us the requested information you consent to its use by Arm to arrange for appropriate accommodations. All accommodation requests will be treated with confidentiality and information concerning these requests will only be disclosed as necessary to provide the accommodation. Although this is not an exhaustive list examples of support include breaks between interviews having documents read aloud or office accessibility. Please email us about anything we can do to accommodate you during the recruitment process!
Equal Opportunities at Arm
Arm is an equal opportunity employer committed to providing an environment of mutual respect where equal opportunities are available to all applicants and colleagues. We are a diverse organization of dedicated and innovative individuals and don't discriminate on the basis of race color religion sex sexual orientation gender identity national origin disability or status as a protected veteran.
Hybrid Working at Arm
Arm's hybrid approach to working is centered around flexibility where we split our time between the office and other locations to get our work done. Within that framework we empower groups and teams to determine their own particular hybrid working pattern depending on the work and the team's needs. Details of what this means for each role will be shared upon application. In some cases the flexibility we can offer is limited by local legal regulatory tax or other considerations and where this is the case we will collaborate with you to find the best solution. Please talk to us to find out more about what this could look like for you!
Salary Range:
$164900-$223100 per year
We value people as individuals and our dedication is to reward people competitively and equitably for the work they do and the skills and experience they bring to Arm. Salary is only one component of Arm's offering. The total reward package will be shared with candidates during the recruitment and selection process.
Accommodations at Arm
At Arm we want to build extraordinary teams. If you need an adjustment or an accommodation during the recruitment process please email [email protected] . To note by sending us the requested information you consent to its use by Arm to arrange for appropriate accommodations. All accommodation or adjustment requests will be treated with confidentiality and information concerning these requests will only be disclosed as necessary to provide the accommodation. Although this is not an exhaustive list examples of support include breaks between interviews having documents read aloud or office accessibility. Please email us about anything we can do to accommodate you during the recruitment process.
Hybrid Working at Arm
Arm's approach to hybrid working is designed to create a working environment that supports both high performance and personal wellbeing. We believe in bringing people together face to face to enable us to work at pace whilst recognizing the value of flexibility. Within that framework we empower groups/teams to determine their own hybrid working patterns depending on the work and the team's needs. Details of what this means for each role will be shared upon application. In some cases the flexibility we can offer is limited by local legal regulatory tax or other considerations and where this is the case we will collaborate with you to find the best solution. Please talk to us to find out more about what this could look like for you.
Equal Opportunities at Arm
Arm is an equal opportunity employer committed to providing an environment of mutual respect where equal opportunities are available to all applicants and colleagues. We are a diverse organization of dedicated and innovative individuals and don't discriminate on the basis of race color religion sex sexual orientation gender identity national origin disability or status as a protected veteran.