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. Recognized as one of AMERICA'S MOST LOVED WORKPLACES® for five consecutive years and a Built In Best Places to Work for six years, we are committed to our 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: The Network Security Architect will perform Network and Network Security assessments and technical evaluations for existing applications and new technology initiatives. Based on industry best practices, this individual will provide guidance and hands-on experience to teams in design, development, and maintenance of various networking and network security solutions. This role will include continuous improvement of network security architecture policies, standards, and procedures for various types of solutions residing in public/private/hybrid infrastructure or SaaS-based solutions. This individual will provide technical leadership and consulting to teams across DFIN who are implementing, modifying, and maintaining technology solutions. The individual will mentor junior and senior engineers on a regular basis and provide technical guidance on operational and project matters. The individual will align emerging solutions across the enterprise to DFIN's Zero Trust Strategy. Responsibilities: • Design and Implementation: Develop and implement comprehensive and detailed architectures for LAN, WAN, and cloud environments, ensuring high availability, scalability, and security. Provide domain expertise in both public and private cloud and enterprise technology. • Technical to Business Translation: Analyze business requirements to develop technical network solutions and their framework. Drive continuous improvement for DFIN network and network security architectures, assess business and application requirements, and recommend optimizations accordingly. • Technical Leadership: Directs the team to adhere to established standards, policies, procedures and configuration guidelines for Network and Network security solutions. Develop Functional, Nonfunctional and Business requirements documentation for new network security initiatives. Actively review architecture ensuring adherence to security standards and policies • Vision: Develops technology roadmaps including on-prem infrastructure and cloud infrastructure. Assist in developing vision and roadmap for the Network Security team. • Firewall Management: Configure, manage, and troubleshoot firewalls to protect network integrity and data security. • Azure Integration: Design and manage network solutions within Azure, including virtual networks, VPNs, load-balancing, network security solutions, and hybrid cloud setups. Test and monitor Azure network and security solutions to ensure optimal performance, scalability, and resilience. • Data Flow and Network Path Analysis: Identify and optimize data flows and network paths to enhance performance and efficiency. • Documentation: Create and maintain detailed network diagrams, configurations, and documentation for reference and troubleshooting. • Collaboration: Work closely with IT teams, product teams, and vendors to ensure seamless integration and operation of network systems in Cloud and Data Centers. • Troubleshooting: Provide advanced troubleshooting and support for network-related issues, ensuring minimal downtime and disruption. • Mentoring: Mentor Junior and Senior engineers as needed around network design, best practices and troubleshooting. • On-Call: Provide Level-3 escalation for level-1/2 On-call duties. Qualifications: Technical Skills: • Minimum of 10 years of hands-on experience in network architecture and design. • Expertise with network security products - Firewall, WAF, LB, DDOS. • Expertise with networking products - Routers, Switches, SDWAN, SASE, wireless, NAC, etc. • Experience with cloud computing platforms including IaaS, PaaS, and SaaS delivery models', key technologies include Azure, Office365, AWS, Google Cloud, container services, and CASB solutions. • Knowledge of Zero trust, zone-based architecture, defense in depth, SASE, SSE, and micro-segmentation • Strong expertise of IT risks, cyber security, Cloud components, Routing Protocols, Security protocols and tools. • Familiarity with Identity solutions, CI/CD tools, configuration and automation techniques, scripting languages, containers and orchestration solutions. • Great communication and interpersonal skills. • Excellent written and verbal communications skills with experience presenting to leadership teams with the ability to communicate security and risk-related concepts to technical and non-technical audiences. Soft Skills: • Provide recommendations to continuously drive optimized spending and ensure maximum value for solution investments. • Lead the identification, development, and collection of key strategic and operational metrics for CISO org. • Research current industry technology to better facilitate vendor and partner communications. Business Partnership: • Establish and maintain strong partnership with the technical, business, customers, associates and sourcing stakeholders and vendors as necessary. • Actively participate in industry/vendor forums to guide product development activities. Education/Certifications: • Bachelor's degree in computer science, Information Technology, or a related field. • Relevant certifications such as CISSP, CCIE, CCDP, AWS/Azure certs, etc are highly desired It is the policy of Donnelley Financial Solutions to select, place, and manage all its employees without discrimination based on race, color, national origin, gender, age, religion, actual or perceived disability, veteran status, actual or perceived sexual orientation, genetic information or any other protected status. If you are a qualified individual w ith a disability or a disabled veteran, you have the right to request a reasonable accommodation if you are unable or limited in your ability to use or access jobs.dfinsolutions.com as a result of your disability. You can request a reasonable accommodation by sending an email to talentacquisition@dfinsolutions.com . At DFIN, protecting your identity is a top priority. Please be aware of scammers impersonating DFIN recruiters. DFIN recruiters will never request personal information via email or text. You will only receive a text from us if you've already been in contact. All automated messages will come from talentacquisition@dfinsolutions.com . If you ever have doubts about the legitimacy of any communication from us, please do not hesitate to reach out for verification via talentacquisition@dfinsolutions.com (this email is for general TA questions and is not used for updates on your application status). #BI-Remote

• Design and implement security across Microsoft Intune, Defender, and Sentinel • Manage Microsoft Intune (Endpoint Manager) for Windows, Linux and Android • Configure Microsoft Defender Endpoint for advanced threat protection • Lead the design and deployment of Microsoft Sentinel • Lead and assist with incident investigations and root cause analysis

Role Description We are seeking a highly skilled Senior Network Engineer to join our Professional Services team. This role is responsible for implementing, supporting, and providing design assistance for complex network and security solutions across enterprise client environments. The ideal candidate brings a strong consulting background, deep expertise in next-generation firewalls, and hands-on experience with SASE and SD-WAN architectures. This is a client-facing role requiring both technical excellence and the ability to deliver high-quality project outcomes in dynamic environments. Key Responsibilities - Implement, migrate, and support network and security solutions across customer environments - Provide design assistance and validation for network and security architectures in collaboration with internal architects and client stakeholders - Serve as a technical SME for next-generation firewall platforms including: - Palo Alto Networks - Fortinet - Cisco - Support deployment and optimization of SASE architectures, including cloud-delivered security services - Deploy and advise on SD-WAN solutions across multi-site enterprise environments - Perform network assessments and provide implementation-focused recommendations - Execute complex migrations (e.g., firewall replacements, SD-WAN transitions, data center modernization) - Develop and maintain technical documentation including implementation guides, as-built documentation, and runbooks - Collaborate with project managers and stakeholders to ensure successful project delivery - Provide knowledge transfer and mentorship to customers and internal teams - Troubleshoot complex network and security issues across hybrid environments (on-prem, cloud, remote users) - Stay current with emerging technologies and industry trends in networking and cybersecurity Qualifications - 7+ years of experience in network engineering, with a focus on network security and enterprise networking - Proven experience in a consulting or professional services role (customer-facing project delivery) - Hands-on experience with: - Palo Alto Networks (PAN-OS, Panorama) - Fortinet FortiGate / FortiManager - Cisco firewalls (ASA, Firepower, FMC) - Strong understanding of: - Routing & Switching (BGP, OSPF, VLANs, VRFs) - VPN technologies (IPSec, SSL VPN) - Network segmentation and zero trust architectures - Experience deploying or supporting SD-WAN solutions (Fortinet, Cisco, or Palo Alto preferred) - Exposure to or experience with SASE platforms (e.g., Prisma Access, FortiSASE, Cisco Secure Access) - Ability to create clear and professional technical documentation - Strong troubleshooting and analytical skills - Excellent communication and client engagement skills Preferred Qualifications - Industry certifications such as: - Palo Alto (PCNSE/PCNSC) - Fortinet (NSE 6/7/8) - Cisco (CCNP, CCIE) - Experience with cloud platforms (Azure, AWS, GCP) and cloud networking - Familiarity with identity integrations (Azure AD, SAML, MFA) in SASE environments - Experience with automation and scripting (Python, Ansible, APIs) - Prior experience working for a VAR, MSP, or consulting organization Soft Skills & Attributes - Strong client-facing presence with the ability to lead technical discussions - Ability to manage multiple projects and priorities simultaneously - Detail-oriented with a focus on delivering high-quality outcomes - Self-motivated and capable of working independently or within a team - Strong documentation and presentation skills

• Serve as the technical reference for perimeter security; • Define and evolve secure architectures for application and API exposure; • Provide technical leadership for initiatives involving Firewalls, Proxies, WAF/CDN, and API protection; • Perform advanced troubleshooting in critical production environments; • Develop and refine protection policies and strategies; • Identify architectural risks and propose structural improvements; • Act as a bridge between Infrastructure, Development, SOC, and Cloud teams; • Reduce operational dependencies through automation and standardization; • Help translate technical risks into business impact; • Ensure support and stability of critical, high-availability environments; • Prepare technical reports and strategic presentations for leadership;