Network Segmentation and Enforcement via Policy as Code

Spring 2022

There is much discussion around zero-trust as the new security model to protect workloads in the post perimeter security remote workforce world. But how does zero-trust work? How is network segmentation automated and policy enforced? Is there a new model that improves zero-trust configuration, orchestration and automation via policy as code. This roundtable discussion session is exclusive for IT teams and is to be a requirements gathering exercise. No slides, just sharing best practices and challenges in a safe environment led by ONUG board members and thought leader. Come to learn from your peers and add your requirements.


Vishal recently joined Gap in late 2015 after stints at Restoration Hardware and Xerox. In his current role, he’s shepherding Gap’s Network Infrastructure as it relates to WAN, supply chain, and data centers. Dedicated to helping Gap achieve its digital transformation and to lay the foundation for the next set of technology services, he is responsible for global architecture, roadmap, strategy and building an engineering team that will be deliver enhanced network/infrastructure services.

Vishal’s current focus is on building the next generation of data centers and WAN, including network automation and Orchestration. This also includes hybrid, private and public clouds, OpenStack running our production environment and continuation of our SD WAN deployment and execution of our roadmap in addition to partnering with our cloud automation team to identify our PaaS and IaaS strategy.

Prior to Gap, Vishal managed Network Engineering, Architecture and Strategy at Restoration Hardware with ownership of service delivery of RH’s Network and Telecom services for all of their retail, supply chain, corporate and data center locations.

Prior to moving to San Francisco Bay Area, he spent more than a decade at Xerox in multiple engineering and management positons with the most recent managing the corporate network infrastructure supporting global data centers, 400+ branch offices and campuses supporting > 130,000 users in addition to program management of a managed service provider and developing technology strategies/roadmaps to meet it’s strategic near and long-term business objectives.

Vishal holds both an MBA in Finance and Economics from Simon Business school (university of Rochester) and MS in Information Technology from Rochester Institute of Technology.

Yesim Akdeniz is a senior Managing Director in Citi technology organization and has been responsible to driving significant transformation across the technology infrastructure landscape over the last 5 years. She has been part of the core leadership team that has driven 30%+ savings across the operating expense, while significantly modernizing Citigroup’s technology capabilities, enhancing customer experience, business agility and managing risk.

Citi technology organization supports business operations in 100+ countries that Citi operates in, across multiple lines of business spanning both Institutional and Retail businesses. The technology engineering organization is designing and deploying industry leading solutions across the Citi footprint as the bank continues to leverage product and business model innovation to maintain and increase Citi’s competitive edge in the market place. Yesim is at the forefront of the innovative thinking that CATE (Citigroup Architecture and Technology Engineering) is delivering.

She has held several senior management positions across Citigroup technology, Yesim has a Masters in Business Administration, Wilmington College and a Bachelors of Art in Computer Science, East Carolina University. As one of the senior most women in technology and co-chair of Enterprise O&T Women Leadership Council at Citigroup, Yesim is actively involved with various ‘Women in Technology’ initiatives, including the Women’s Bond Club and Citigroup sponsorship programs. Additionally, Yesim was awarded the top 100 CIOs award by the CIO magazine in 2010,, and she was inducted into the 42nd Annual YWCA Academy of Women Leaders on in 2016.

James Walker, is an ONUG Board Member, VP of Strategy & Transformation at IBM Cloud, and has previously held senior executive roles in technology at Bank of America, Morgan Stanley and Credit Suisse.

Xiaobo leads a team to deliver leading edge technology solutions in support of Citi IT strategy. She drives critical solutions to secure Citi’s hybrid cloud environments to enable Citi to reduce risks and stay compliant while allowing Citi’s businesses to benefit from the opportunities that cloud services provide. Xiaobo started her career as a Network Engineer at Goldman Sachs in 2009 after she got her Ph.D. in Electrical Engineering from Rensselaer Polytechnic Institute. She has been selected for “Rising Star Award” to represent Citi at the Women’s Bond Club in the financial industry in 2017. She is also on Palo Alto Network Vendor’s Cloud Customer Advisory Board.

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