Sr. Manager - Network Security Engineering & Ops

Join a dynamic team at the pulse of global markets, where we deliver innovative software and service solutions for essential financial reporting and capital markets transactions. At DFIN, we are a values-driven organization that empowers you to build a fulfilling career while bringing your authentic self to work every day. Our "Win as One" mentality ensures that our team's success is directly linked to Client, Shareholder and Employee Satisfaction.
In 2026, DFIN was named #1 on the 2026 Top 100 Global Most Loved Workplaces® by Best Practice Institute. We have also been recognized as one of America's Most Loved Workplaces® for five consecutive years and a Built In Best Place to Work for six years, reflecting our continued commitment to supporting employees' total well-being. Enjoy competitive compensation, a flexible workplace, comprehensive benefits, and opportunities for professional growth. Bring your passion and talents to DFIN - because being YOU thrives here.
Summary:
We are seeking a highly experienced and strategic Senior Manager to lead our Network Security Engineering & Operations team. This role is responsible for ensuring the availability, reliability, and security of critical network infrastructure components including remote worker technologies, firewalls, load balancers, web application firewalls (WAFs), routers, switches, and wireless access points. This includes supporting network connectivity and network security to all sites, datacenters, and cloud providers. The ideal candidate will bring deep technical expertise, strong leadership skills, and a proactive approach to managing 24/7 operational support and escalations.
Responsibilities:
Leadership & Strategy

• Lead and mentor a team of network security engineers, ensuring a team culture aligned to CISO Org behavioral goals and DFIN values.
• Lead network security projects, including strategy, requirements gathering, and definition of scope and project timelines as a Product Owner.
• Collaborate with cross-functional teams to align network security initiatives with business objectives, balancing internally and externally driven work requests.
• Maintain relationships with partners and vendors including budget management and negotiations.
• Foster a culture of continuous improvement through regular coaching, mentoring, and performance check-ins; ensure appropriate skills are gained and maintained.
• Promote accountability and recognize high performance while addressing areas for improvement with clear action plans.
• Exceptional communication and interpersonal skills, including negotiation, facilitation, and consensus building; ability to influence and persuade without direct authority.
• Ability to communicate complex and technical issues to diverse audiences, orally and in writing, in an easily understood, authoritative, and actionable manner.

Responsibilities Continued
Engineering & Operations

• Oversee the design, implementation, and maintenance of network security technologies including firewalls, WAFs, load balancers, routers, switches, remote access, and wireless access points.
• Ensure high availability and performance of network and network security services through proactive monitoring and capacity planning.
• Manage lifecycle of network security systems and services including upgrades, patching, and end-of-life transitions.
• Develop and maintain appropriate metrics to monitor the health of network and network security services, as well as team responsiveness and delivery.

Incident Management & Escalation

• Serve as primary escalation point for critical network and network security incidents, including 24/7 support for critical outages.
• Lead root cause analysis and resolution efforts for outages or incidents.
• Maintain and improve incident response processes and documentation.

Compliance & Risk Management

• Ensure network security infrastructure complies with internal policies and client obligations.
• Conduct regular audits and assessments to identify and mitigate risks.
• Support vulnerability management and remediation efforts.

24/7 Availability

• Maintain readiness for 24/7 support and escalation, including participation in on-call rotations as needed.
• Implement automation and redundancy to reduce manual intervention and improve resilience.

Qualifications:

• Bachelor's degree in a relevant discipline or equivalent experience.
• CISSP, CISM, CCNP, and/or other relevant certifications are a plus.
• Minimum of 5 years' experience leading network and other engineering disciplines including related architecture efforts.
• Minimum of 5 years' experience designing and implementing enterprise network security or similar engineering disciplines; demonstrates exceptional innovation and keen awareness of external threats necessary to drive a preventative posture.
• Strong demonstrated knowledge of network security products including firewall, WAF, load balancer, DDoS, and microsegmentation technologies.
• Strong demonstrated knowledge of networking products including routers, switches, and wireless technologies.
• Proven experience interfacing with senior management and communicating complex cybersecurity concepts in business-relevant ways.
• Strong demonstrated knowledge of enterprise systems, cloud solutions, and IT/security technologies.
• Extensive experience in strategic planning, budgeting, and resource allocation.
• Excellent written and verbal communication skills with experience presenting to leadership teams and communicating security and risk-related concepts to both technical and non-technical audiences.
• Strong business analysis skills, problem-solving techniques, and follow-through.
• Willing and able to roll up sleeves and lead from the front.
• A self-starter with a can-do attitude who drives engagement and accountability internally and cross-functionally.
• A driver and implementer who possesses the poise and ability to act calmly and competently in high-pressure, high-stress situations.

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