Snr. Director, Client Security
CurrentEnterprise and Business lead information security officer
Aug 2023 - Present
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Chris Diffley Email & Phone Number
Snr. Director, Cyber Security
at
Optus
LinkedIn matched
✓ Verified May 2026
3 data sources
Profile completeness 86%
Current company
Role
Snr. Director, Cyber Security
Location
Killarney Heights, New South Wales, Australia
Company size
Who is Chris Diffley? Overview
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Quick answer
Chris Diffley is listed as Snr. Director, Cyber Security at Optus, a company with 10167 employees, based in Killarney Heights, New South Wales, Australia. AeroLeads shows a matched LinkedIn profile for Chris Diffley.
Chris Diffley previously worked as Snr. Director, Client Security at Optus and Snr. Director, Global Operations at Optus. Chris Diffley holds Mba from Macquarie University - Graduate School Of Business.
Company email context
Email format at Optus
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Optus
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Profile bio
About Chris Diffley
A talented, industrious and experienced Information Security Manager and Security Director, with a current Federal clearance, Certified Information Security Management (CISM) certification, a top percentile MBA and a comprehensive consulting career portfolio. An outstanding leader with an inherent ability to motivate large, cutting-edge technical teams with proven, step-change impact to employee engagement. Adept at getting real outcomes in both large and smaller organisations, within strong ITIL environments, implementing and driving frameworks and standards such as Lean Six Sigma, ISO 27001, Essential 8, automation, and AIOps, to deliver top class service performance across Asia Pacific. A trusted advisor and influencer of C-Suite executives and a strategic thinker with the ability to drive continuous improvement and operational effectiveness, particularly within cyber security teams. Leadership of security governance, risk, compliance and threat information as a business enabler to key stakeholders, rather than a blocker to progress.
Current workplace
Chris Diffley's current company
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Optus
11 roles
Chris Diffley work experience
A career timeline built from the work history available for this profile.
Snr. Director, Global Operations
Jul 2022 - Dec 2023
Director, Operations
Apr 2020 - Aug 2022
Associate Director, Secure Tac
May 2018 - Apr 2020
Manager - Networks And Security
Grow and improve the Networks and Security Centres of Excellence within Optus Business. Building partnerships with Government and Australian business to fully encapsulate the power of 'Yes'...!
Aug 2014 - May 2018
Operations And Engineering Manager Vas
Leader of large team of cross-functional engineers in a prominent ITIL environment, delivering to strategic operations plan. Management of networks and security infrastructure of the Victorian Government's National Early Warning System (NEWS), to prevent injury and loss of life in bushfires and other natural disasters.
May 2012 - Aug 2014
Jan 2011 - Dec 2011
Asia Pacific Operations Manager
Airwide Solutions
- Successfully integrated the respective Asia-Pacific operationsdivisions when Airwide Solutions acquired First Hop Ltd. in 2007, delivering a cross-cultural and technological team able to offer a best in class service.- Enabled operational revenues to increase in the Asia Pacific region by a factor of 112% over 3 years by delivering high performance.
May 2005 - Jan 2011
Consultant To Vodafone Australia - Messaging Data Specialist
- Consultant for a leading provider of mobile communications services in Australia. - Through process improvement, achieved a 100% Service Level Agreement outcome and a reduction in faults logged by the business of over 26% month on month.- Delivered Vodafone’s most successful Christmas and New Year period – for data revenue and profit.- Management of the.
Jul 2004 - May 2005
Consultant And Delivery Leader To O2
- Highly recognised leader of a team of engineers to deliver best in class service during the period that Telefonica were acquiring the business and focussing on performance and revenue targets being exceeded.- Achieved Employee Performance Award of overseas holiday for work on building the relationship with the customer and moving the account from one of.
Jan 2001 - Mar 2004
Technical Consultant
- Graduate hire into the Academy Program, winning Team of the Academy award presented by COO.- Consultant to various companies including the leading international insurance and financial services company, and the automotive industry. The role involved application development, data mining and analysis using SAS statistical analysis software tools.
Apr 1998 - Jan 2001
Team & coworkers
Colleagues at Optus
Other employees you can reach at optus.com.au. View company contacts for 10167 employees →
SJ
Stuart Jones
Colleague at Optus
Greater Melbourne Area, Australia
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RX
Ry X
Colleague at Optus
Greater Sydney Area, Australia
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HS
Hardip Singh
Colleague at Optus
The Ponds, New South Wales, Australia, Australia
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NC
Nicole Crosdale
Colleague at Optus
Greater Sydney Area, Australia
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MB
Michael Bartlet
Colleague at Optus
Greater Sydney Area, Australia
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LM
Liam Mantesso
Colleague at Optus
Heidelberg Heights, Victoria, Australia, Australia
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DR
Dean Rance
Colleague at Optus
Greater Melbourne Area, Australia
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AK
Arek Ka
Colleague at Optus
Ireland, Ireland
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ND
Nadeera De Alwis
Colleague at Optus
Maraylya, New South Wales, Australia, Australia
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JR
Julie Robinson
Colleague at Optus
Lane Cove North, New South Wales, Australia, Australia
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Stuart Jones
Colleague at Optus
Greater Melbourne Area, Australia
View →
RX
Ry X
Colleague at Optus
Greater Sydney Area, Australia
View →
HS
Hardip Singh
Colleague at Optus
The Ponds, New South Wales, Australia, Australia
View →
NC
Nicole Crosdale
Colleague at Optus
Greater Sydney Area, Australia
View →
MB
Michael Bartlet
Colleague at Optus
Greater Sydney Area, Australia
View →
LM
Liam Mantesso
Colleague at Optus
Heidelberg Heights, Victoria, Australia, Australia
View →
DR
Dean Rance
Colleague at Optus
Greater Melbourne Area, Australia
View →
AK
Arek Ka
Colleague at Optus
Ireland, Ireland
View →
ND
Nadeera De Alwis
Colleague at Optus
Maraylya, New South Wales, Australia, Australia
View →
JR
Julie Robinson
Colleague at Optus
Lane Cove North, New South Wales, Australia, Australia
View →
3 education records
Chris Diffley education
Mba
Macquarie University - Graduate School Of Business
Prince2, Certified Practitioner Of Prince2
Prince2
Education record
FAQ
Frequently asked questions about Chris Diffley
Quick answers generated from the profile data available on this page.
What company does Chris Diffley work for?
Chris Diffley works for Optus.
What is Chris Diffley's role at Optus?
Chris Diffley is listed as Snr. Director, Cyber Security at Optus.
Where is Chris Diffley based?
Chris Diffley is based in Killarney Heights, New South Wales, Australia while working with Optus.
What companies has Chris Diffley worked for?
Chris Diffley has worked for Optus, Nokia Siemens Networks, Macquarie Graduate School Of Management, Airwide Solutions, and Hp.
Who are Chris Diffley's colleagues at Optus?
Chris Diffley's colleagues at Optus include Stuart Jones, Ry X, Hardip Singh, Nicole Crosdale, and Michael Bartlet.
How can I contact Chris Diffley?
You can use AeroLeads to view verified contact signals for Chris Diffley at Optus, including work email, phone, and LinkedIn data when available.
What schools did Chris Diffley attend?
Chris Diffley holds Mba from Macquarie University - Graduate School Of Business.
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