Sr. Network Security Engineer

| Chicago
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Donnelley Financial Solutions (DFIN) is a leader in risk and compliance solutions, providing insightful technology, industry expertise and data insights to clients across the globe. We’re here to help you make smarter decisions with insightful technology, industry expertise and data insights at every stage of your business and investment lifecycles. As markets fluctuate, regulations evolve and technology advances, we’re there. And through it all, we deliver confidence with the right solutions in moments that matter. 


Plan, engineer, configure, implement, and troubleshoot security and network infrastructure necessary to maintain and secure global enterprise network. Provide subject matter expertise for a variety of technology projects with an emphasis on security technology. Partner with internal and external business units as necessary to provide security assurance against cyber attacks, to include denial of service campaigns, web defacement, unauthorized access, data loss and other cyber activities that could negatively impact the good name and reputation of Donnelley Financial Solutions and our customers. Provide operational support for security and network infrastructure. Proactively identify security vulnerabilities and mitigation opportunities within the security and network infrastructure. Deliver an Ideal Customer Experience by always executing with quality and excellence. Demonstrate an aptitude for maintaining strong security market awareness as well as to recommend, implement, and manage cutting-edge technologies.

Role Specific Responsibilities:


  • Conduct high-level and low-level designs for Enterprise security and network infrastructure projects.
  • Implement Enterprise infrastructure changes.
  • Interact with partner organizations/departments to design network or system solutions for DFIN Enterprise infrastructure. make recommendations on investments for network hardware and services.
  • Evaluate new security and network technologies and recommend future strategy to management.
  • Experience in architecture and design of a global enterprise network.


  • Actively participate and identify changes needed in Enterprise infrastructure strategy reviews, design sessions and configurations necessary to achieve the technology organization goals.
  • Analyze network & system response and determine tuning recommendations to improve performance, adhere to capacity management expectations, and provide performancemanagement reporting.
  • Manage effective issue identification and resolution processes; serve as a senior escalation point for all Enterprise network and security operations issues with a degree of quality that results in absolute root-cause determination and drive vendor partners to provide quality assurances by requiring immediate bug fixes, software updates, etc., as necessary to ensure an Ideal Customer Experience at all times.
  • Perform 24x7x365 advanced tier 1-3 support, to include but not limited to: troubleshooting, off-hour maintenance activities, problem resolution, and on-call rotation while ensuring adherence to the Donnelley Financial Solutions Change Management policy.
  • Create and maintain documentation as it relates to network systems, design, configuration, support, and processes for all supported network infrastructure. Create and maintain Disaster Recovery plans; ensure they are tested and updated regularly.
  • Participate in the on-call rotation.


  • Assist with defining requirements in support of budget plans and make recommendations for ways to improve performance and reduce costs. Develop business cases that support changes to network and system infrastructure.
  • Develop network and system performance tools and integrate them into the existing infrastructure. Design an effective test plan for any new/changed service provider infrastructure.
  • Ensure communication of process and procedure changes to key stakeholders.
  • Support identification and collection of metrics and performance reporting processes. Determine Key Performance Indicators and infrastructure standards · Identify process improvement areas and develop the improvement initiatives.

Soft Skills:

  • Research current industry technology to better facilitate vendor and partner communications
  • Subject Matter Expertise (SME) for relevant technologies.
  • Requires minimal supervision to perform job duties.
  • Develop and deliver cross-training to other members of the team. Participate in and encourages a knowledge-sharing environment both within and outside the department.
  • Assist in budget planning process.

Business Partnership:

  • Establish and maintain working relationships with the technical, business, customers, associates, sourcing counterparts and vendors as necessary to proactively identify needed changes.
  • Participate in process improvement initiatives.
  • Actively participate in industry/vendor forums to guide product development activities.

People Management:

  • Manage individual workload and deliver to agreed-upon milestones.
Minimum Experience and Educational Requirements:

The Sr. Network Security Engineer is expected to demonstrate technical knowledge of the skills listed below. The technical skills will depend on his/her specific responsibilities within the organization.


  • Minimum of 6 years of working knowledge in Next Gen Firewalls, Load balancers, WAF, NAC and SIEM.
  • Minimum of 4 years of working knowledge in routers, switches.
  • Minimum of 3 years working knowledge of a major scripting language.
  • Minimum of 4 years of working knowledge in network management and troubleshooting tools.
  • Minimum of 4 years of knowledge on routing and switching protocols.
  • Working knowledge of O365, Visio, G-suite, Lucid Charts.
  • Minimum of 4 years of working knowledge of public (Azure, AWS ), SaaS Products and private cloud.
  • Knowledge of SD-WAN is preferred.
  • Excellent written and verbal communication skills.
  • Travel required (+/-5%).

Education and Certification:

  • Bachelor’s degree in related technical / business areas is required.
  • CCNP, CISSP preferable but not required.
  • Any other certification is a plus.

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's status, actual or perceived sexual orientation, genetic information or any other protected status. 

If you are a qualified individual with 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 as a result of your disability. You can request a reasonable accommodation by sending an email to [email protected]. #TalentknowsTalent

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Technology we use

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Located in the heart of downtown Chicago’s financial district, we are steps from all Metra stations, good eats and entertainment.

An Insider's view of DFIN

What projects are you most excited about?

In transforming and improving FinTech products, excitement comes from the challenge of knowing that the problems are complex, yet the solutions must be easy to use. When we start a new project, I can't wait to sink my teeth into understanding the problem space, talking to users, designing the solution, and seeing it through to release.


Principal Product Designer

What makes someone successful on your team?

Active and honest listening – Contrary to the stereotypical, extroverted sales rep, some of my most effective and insightful client interactions are when I do the least amount of talking, and the most active listening. Client insight is exponentially easier to excavate when you stop “pitching” – and start listening.


Senior Sales Representative

What is your vision for the company?

Our business plan reflects the change in products DFIN is selling today versus what we sell in five years. DFIN today is a company that offers a lot of professional services that we added software to, but the goal is to become a SaaS company that has services to support it.


SVP, Global Head of Engineering

What does your typical day look like?

The role of a software engineer is really about creating computational systems and ensuring they behave as designed. My day-to-day is focused mostly on writing code that provides new functionality within our products that we see a need for in the market—and providing quality control to be certain it works properly.


Senior Software Engineer

What are DFIN Perks + Benefits

DFIN Benefits Overview

The world continues to change in ways we never expected, but there is one constant: your safety and well-being is a top priority, and DFIN has you covered with our benefits.

Partners with Nonprofits
Friends outside of work
Eat lunch together
Intracompany committees
Daily sync
Open door policy
Team owned deliverables
Team based strategic planning
Group brainstorming sessions
Open office floor plan
Documented equal pay policy
Dedicated Diversity/Inclusion Staff
Highly diverse management team
Unconscious bias training
Diversity manifesto
Someone's primary function is managing the company’s diversity and inclusion initiatives
Diversity Employee Resource Groups
Hiring Practices that Promote Diversity
Health Insurance & Wellness Benefits
Flexible Spending Account (FSA)
Disability Insurance
Dental Benefits
Vision Benefits
Health Insurance Benefits
Life Insurance
Wellness Programs
Onsite Gym
Mental Health Benefits
Retirement & Stock Options Benefits
401(K) Matching
Company Equity
Performance Bonus
Child Care & Parental Leave Benefits
Generous Parental Leave
Flexible Work Schedule
We value a work / life balance at DFIN.
Remote Work Program
We have partial and fully remote opportunities at DFIN.
Family Medical Leave
Family Medical Leave granted under the Family and Medical Leave Act (FMLA).
Adoption Assistance
Return-to-work program post parental leave
Vacation & Time Off Benefits
Generous PTO
Paid Holidays
Paid Sick Days
Perks & Discounts
Casual Dress
Commuter Benefits
Company Outings
Stocked Kitchen
Happy Hours
Employee parking available
Fitness Subsidies
Professional Development Benefits
Job Training & Conferences
Diversity Program
Lunch and learns
Cross functional training encouraged
Promote from within
Mentorship program
Time allotted for learning
Online course subscriptions available
Customized development tracks
Paid industry certifications
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