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JLL Spark
JLL Spark

Senior Network Security Engineer

JLL Technologies

JLL Technologies

Multiple locations
Posted on Friday, September 22, 2023

JLL supports the Whole You, personally and professionally.

Our people at JLL are shaping the future of real estate for a better world by combining world class services, advisory and technology to our clients. We are committed to hiring the best, most talented people in our industry; and we support them through professional growth, flexibility, and personalized benefits to manage life in and outside of work. Whether you’ve got deep experience in commercial real estate, skilled trades, and technology, or you’re looking to apply your relevant experience to a new industry, we empower you to shape a brighter way forward so you can thrive professionally and personally.

About the role:

This position is responsible for providing both hands on technically secure configurations and supporting secure architectures for Global JLL Network and Security Infrastructure. This role is a dynamic role that will require strong technical ability across multiple technical disciplines and resilient interpersonal skills. A successful candidate in this role will be able to execute our mission to protect a global network in close collaboration with worldwide 1st party and 3rd party leadership, engineering, application, and security teams to ensure that security investments are optimized, and controls are implemented based on actionable intelligence and industry best practices.

Primary Responsibilities:

  • Serve as an additional and collaborative subject matter expert point of contact for inquiries about global on premises + cloud-based Network Security engineering technologies such as but not limited to Web Application Firewalls (WAF), Content Delivery Networks (CDN), application aware firewalls, IDP/IPS systems, DoS prevention platforms, VPN concentrators, device management platforms, and other network security technologies.

  • Serve as a subject matter expert point of contact in multiple technical capabilities including but not limited to: Web Application Firewall (WAF) onboarding and policy tuning, firewall ruleset tuning, IDS/IPS tuning, DDoS protection services, network device policy management, VPN security (client based and site to site), break/fix troubleshooting and configuration review and optimization.

  • Independently or collaboratively analyze and troubleshoot complex issues to find solutions in alignment with the organization’s larger security objectives

  • Create Network Security engineering related documentation, reports and/or change proposals that feature well-defined findings and recommendations.

  • Configure and report on the status of current and future defensive measures to protect the organization from advance threat actor tactics

  • Become an advocate for the greater Security team's initiatives, not just Network Security Engineering

  • Effectively communicate multifaceted technical problems and solutions to global technical and non-technical C-Level executives.

  • Work as part of a team to develop innovative solutions to complex global Network Security requirements.

  • Work as part of a team to analyze our existing Network Security processes, procedures and architectures to identify inadequacies and provide recommendations for necessary changes.

  • Work with a global organization to troubleshoot network and application related issues, develop fixes, build and submit changes.

  • Maintain knowledge of newly emerging threats that may impact the organization's security, while also optimizing the existing security tools to safeguard against such threats.

  • Actively participate in the maintenance and tuning of Network Security engineering technologies including but not limited to WAFs, CDNs, VPNs, application aware firewalls, VPNs, and IPS/IDS devices.

Preferred Qualifications:

  • 8+ years' experience working with Network Security technologies, protocols, and tools (specifically in highly technical hands-on roles designing and/or implementing security solutions).

  • Working knowledge of the HTTP protocol, webapp based vulnerabilities and their mitigations (to include but not limited to TLS interception, information leakage, directory traversal, SQL injection, cross site scripting, command injection, local file inclusion, remote file inclusion, request forgery, rate controls, tarpits, sinkholing, geoblocking, bot detection, reputation detection).

  • Proficiency in at least one scripting language, Linux and command line tools.

  • Working knowledge of multiple public cloud environments such as but not limited to Azure, GCP, AWS, Alibaba, etc.

  • Expert route/switch protocol knowledge with a focus on DNS, TCP/IP, IPSEC, TLS, HTTP, GRE, OSPF and BGP.

  • Expert level understanding of network flows and packet capture assisted troubleshooting of dynamically routed inter-continental network architectures.

  • Expert analytical skills to identify potential security threats, vulnerabilities, misconfigurations and develop meaningful business ready solutions to these issues.

  • Working knowledge of at least 1 SIEM for log analysis, behavior analysis and/or ruleset tuning.

  • Strong understanding of information security frameworks, best practices, operations and technology management.

  • Proven experience in written and verbal communication, expectation management and timely completion of tasks within budget and schedule.

  • Industry recognized certifications such as but not limited to: GIAC, PCNSE, PCNSC, CCNA, CCNP, CCIE, etc.


Hybrid –Chicago, IL, Dallas, TX, Orlando, FL, Philadelphia, PA

If this job description resonates with you, we encourage you to apply, even if you don’t meet all the requirements. We’re interested in getting to know you and what you bring to the table!

Personalized benefits that support personal well-being and growth:

JLL recognizes the impact that the workplace can have on your wellness, so we offer a supportive culture and comprehensive benefits package that prioritizes mental, physical and emotional health. Some of these benefits may include:

  • 401(k) plan with matching company contributions

  • Comprehensive Medical, Dental & Vision Care

  • Paid parental leave at 100% of salary

  • Paid Time Off and Company Holidays

  • Flexible and Remote Work Arrangements may be available

About JLL

For over 200 years, JLL (NYSE: JLL), a leading global commercial real estate and investment management company, has helped clients buy, build, occupy, manage and invest in a variety of commercial, industrial, hotel, residential and retail properties. A Fortune 500 company with annual revenue of $20.9 billion and operations in over 80 countries around the world, our more than 103,000 employees bring the power of a global platform combined with local expertise. Driven by our purpose to shape the future of real estate for a better world, we help our clients, people and communities SEE A BRIGHTER WAY. JLL is the brand name, and a registered trademark, of Jones Lang LaSalle Incorporated. For further information, visit jll.com.

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This position may require you to be fully vaccinated against COVID-19. If required, you’ll be asked to provide proof that you’re fully vaccinated upon your start date. You’re considered fully vaccinated two weeks after you receive the second dose of a two-dose vaccine series (e.g., Pfizer or Moderna) or two weeks after a single-dose vaccine (e.g., Johnson & Johnson/Janssen). Failure to provide proof of vaccination may result in termination.

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Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.