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David Phelan Email & Phone Number

Location: Glastonbury, England, United Kingdom 13 work roles 2 schools
1 work email found @lseg.com 3 phones found area 799 and 800 LinkedIn matched
✓ Verified Jul 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 3 phones

Work email d****@lseg.com
Direct phone (799) ***-****
LinkedIn Profile matched
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Role
Network Architect
Location
Glastonbury, England, United Kingdom
Company size

Who is David Phelan? Overview

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Quick answer

David Phelan is listed as Network Architect at LSEG (London Stock Exchange Group), a with 22960 employees, based in Glastonbury, England, United Kingdom. AeroLeads shows a work email signal at lseg.com, phone signal with area code 799, 800, and a matched LinkedIn profile for David Phelan.

David Phelan previously worked as Network Architect at Refinitiv and Network Architect at Thomson Reuters. David Phelan holds Meng, Microelectronics & Software Engineering from Newcastle University.

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Email format at LSEG (London Stock Exchange Group)

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{first}.{last}@lseg.com
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AeroLeads found 1 current-domain work email signal for David Phelan. Compare company email patterns before reaching out.

Profile bio

About David Phelan

A CCIE since 1998, I enjoy working with complex networking designs and dealing with state of the art technologies. I'm currently interested in wireless networking and ubiquitous computing. What happens when the network and processing fades into the background?Specialties: Cisco Certified Internetwork Expert #3590 (Emeritus)Routing, Switching, Network architecture & design, Security and Firewalling.Linux and unix.Wireless Networking.

Listed skills include Routing And Switching, Unix, Security, Cisco Technologies, and 46 others.

Current workplace

David Phelan's current company

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LSEG (London Stock Exchange Group)
Lseg (London Stock Exchange Group)
Network Architect
Glastonbury, GB
Website
Employees
22960
AeroLeads page
13 roles · 27 years

David Phelan work experience

A career timeline built from the work history available for this profile.

Network Architect

London, England, Gb

I am responsible for the network architecture within a global population of 9 enterprise-scale datacenters, and many more smaller co-location facilities. I define the architecture, ensure standards are maintained, and determine strategy and evolution of the network in line with business requirements.While working with major vendors such as Cisco, Checkpoint, Palo Alto, and F5, I maintain a broad and deep overview of the industry, and engage with other vendors to maintain visibility.My current challenges (2021) are supporting the separation of the heritage Refinitiv network from Thomson Reuters, keeping visibility of the integration with LSEG, and architecting the switching and network services components as we steer the network towards a more orchestrated and automated method of operation, with intent-based infrastructure & design as code.

Network Architect

London, England, Gb

I am responsible for the network architecture within a global population of 10 enterprise-scale datacenters, and many more smaller co-location facilities. I define the architecture, ensure standards are maintained, and determine strategy and evolution of the network in line with business requirements.While working with major vendors such as Cisco, Checkpoint, Palo Alto, and F5, I maintain a broad and deep overview of the industry, and engage with other vendors to maintain visibility.My current challenges are supporting a huge effort to reduce the datacenter footprint through virtualisation, refreshing the hosting environment around critical mainframes, and steering the network towards more orchestrated and automated operations.Refinitiv, formerly the Financial & Risk business of Thomson Reuters, is one of the world’s largest providers of financial markets data and infrastructure. Serving more than 40,000 institutions in over 190 countries, we provide information, insights, and technology that drive innovation and performance in global markets. Our 160-year Reuters heritage of integrity enables customers to make critical decisions with confidence, while our unique open platform, best-in-class data, and cutting-edge technology bring greater opportunity to our customers. By advancing our customers, we drive progress for the entire financial community.Visit refinitiv.com. Join our community on LinkedIn (refini.tv/linkedin) and Twitter (refini.tv/twitter)

Oct 2018 - Jan 2021

Network Architect

Toronto, On, Ca

Working for the Principal Network Architect, I am responsible for the Datacentre Networks across the business.Achievements and ongoing roles:+ Supporting Design and Engineering teams on a technical and architecture basis+ Simplifying datacenter to WAN handoffs+ IPv6 strategy and architecture for the datacenter+ Network simplification and migration+ Architectural steer for exiting legacy datacenters

Dec 2012 - Oct 2018

Lan Development

Toronto, On, Ca

I was part of the LAN Development team, maintaining responsibility for defining standardised elements of the network architecture, and supporting the engineering and design teams in utilising these standards. My primary achievement was the network design for the new Thomson Reuters Aurora datacentres, building on previous work on the Cell 2.0 architecture, and network elements designed for the Virtualisation initiative. The design responsibility was very broad, with involvement supporting the higher-level architectural definitions, right through to supporting the implementation by ensuring correct placement of systems in cabinets suitable for their network connectivity. A keen eye for detail was vital in this.I also managed the technical engagement with a key network vendor, and was intimately involved with identifying and remediating several complex technical issues.

Jan 2010 - Dec 2012

Lead Network Architect

Toronto, On, Ca

I was a key member of the team responsible for defining a Virtual Infrastructure for Reuters. While virtualisation of the server estate is not a network responsibility, ensuring the networks support the hosting infrastructure for Virtual machine is crucial. From the start of the initiative, I was involved defining network designs, consulting on possible topologies, and ensuring a good fit with the existing network.I assisted in the design, and was responsible for the testing of the network elements of the new Cell 2.0 design, supporting virtualised network partitions within the existing Reuters datacentre architecture.

Apr 2008 - Dec 2009

Senior Network Architect

Toronto, On, Ca

Oct 2007 - Apr 2008

Technical Volunteer

Piertopier.Net

I have been involved with piertopier.net from it's very earliest days, and was mainly responsible for nagging people about routing protocols and documentation, and drawing pictures with way too much detail on them.I presented to the BCS about piertopier.net.http://www.davephelan.org/~piertopier/BCS-2004-10-20-v1.0.html

Feb 2003 - Oct 2010

Senior Consultant

Fairfield, New Jersey, Us

Senior Consultant, dealing with IP network design and implementation, in the mobile telephony and large enterprise areas.

May 2004 - Sep 2007

Technology Development Manager

Frontrunner

I was the Security Technology Development Manager for Frontrunner, reporting to the VP Technology, and was responsible for Frontrunner’s technical delivery capability in the Security technology field. In this role I was the technical lead and mentor for those consultants specialising in security. As well as assisting the consultants in maintaining and enhancing their technical skills, I was responsible for ensuring the company's awareness of the technologies, products and services available in the marketplace.My TDM role also involved presales activity, and technical input into Frontrunner’s offered products and solutions. FrontRunner’s security offering was structured using BS7799 as a framework through my efforts. The company achieved both the Cisco VPN/Security Technology specialisation and the Cisco VPN/Security Services Specialisation (amongst others) during this time, as part of FrontRunner becoming the first ever services-only Cisco Gold Partner

Mar 2000 - May 2004

Security Consultant

Levallois-Perret, Fr

In this role (initiated due to an organisational restructuring) I worked with many different networking and security technologies, including such projects as:• Snort IDS design and implementation on Linux for a Digital Interactive TV datacentre;• Wireless Network Authentication and Security design using Linux, NoCatAuth and FreeRadius for the European Centre for Mid-range Weather Forecasting;• Helpdesk technician (standing in for a junior colleague) at a major train operating company during a Blaster worm infection;• A broad security consulting role for Connex, addressing issues from the policy arena right through to network design and firewall implementation;• Conducted a wide-ranging Vulnerability assessment and Policy audit for the European Centre for Mid-range Weather Forecasting;In 2002, I was one of two consultants leading a small support and implementation team during the early days of a new Interactive TV channel.

2000 - 2004 ~4 yrs

Technical Specialist

Bt

London, Gb

Evaluate Network design, assess Security impacts, and test new designs, hardware, and software on a test network (reference model)

Aug 1989 - Mar 2000
Team & coworkers

Colleagues at LSEG (London Stock Exchange Group)

Other employees you can reach at lseg.com. View company contacts for 22960 employees →

2 education records

David Phelan education

Meng, Microelectronics & Software Engineering

Newcastle University

Education record

The Mosslands School
FAQ

Frequently asked questions about David Phelan

Quick answers generated from the profile data available on this page.

What company does David Phelan work for?

David Phelan works for LSEG (London Stock Exchange Group).

What is David Phelan's role at LSEG (London Stock Exchange Group)?

David Phelan is listed as Network Architect at LSEG (London Stock Exchange Group).

What is David Phelan's email address?

AeroLeads has found 1 work email signal at @lseg.com for David Phelan at LSEG (London Stock Exchange Group).

What is David Phelan's phone number?

AeroLeads has found 3 phone signal(s) with area code 799, 800 for David Phelan at LSEG (London Stock Exchange Group).

Where is David Phelan based?

David Phelan is based in Glastonbury, England, United Kingdom while working with LSEG (London Stock Exchange Group).

What companies has David Phelan worked for?

David Phelan has worked for Lseg (London Stock Exchange Group), Refinitiv, Thomson Reuters, Piertopier.Net, and Thrupoint.

Who are David Phelan's colleagues at LSEG (London Stock Exchange Group)?

David Phelan's colleagues at LSEG (London Stock Exchange Group) include Jane Clarize Puyat, Vikram K, Jane Vijetha Coutinho, Venu Gopal, and Lucian Balakrishnan.

How can I contact David Phelan?

You can use AeroLeads to view verified contact signals for David Phelan at LSEG (London Stock Exchange Group), including work email, phone, and LinkedIn data when available.

What schools did David Phelan attend?

David Phelan holds Meng, Microelectronics & Software Engineering from Newcastle University.

What skills is David Phelan known for?

David Phelan is listed with skills including Routing And Switching, Unix, Security, Cisco Technologies, Routing, Wireless Networking, Switching, and Unconference.

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