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Senior Manager, Network Security
PfizerGreece-Thessaloniki ChortiatisSenior6+ years
Apply ROLE SUMMARY
Our Global Cyber Defense team is responsible for safeguarding Pfizer’s digital assets and infrastructure through proactive threat detection, response, and risk mitigation across on-premises, cloud, and hybrid environments.
The Senior Manager, Network Security is responsible for leading the design, implementation, and continuous improvement of network security capabilities, while partnering closely with SOC, Threat Intelligence, Identity Security & Access Management, Cloud Services, Infrastructure, and Manufacturing/OT teams. Reporting into Cyber Defense, this role ensures that on-premises, cloud, and hybrid network environments are securely architected, effectively monitored, and protected against evolving threats.
ROLE RESPONSIBILITIES
Lead the network security capability, including strategy, roadmap, and oversight of controls protecting enterprise network infrastructure and connectivity.
Design and maintain network security architectures, standards, and guardrails across on‑premises, cloud, and hybrid environments.
Oversee the implementation, configuration, and lifecycle management of network security technologies such as firewalls, network segmentation, remote access, and secure connectivity solutions.
Partner with Infrastructure, Cloud Services, and Digital teams to integrate network security into platform design, modernization, and transformation initiatives.
Collaborate with Security Operations and Incident Response teams to support detection, investigation, and response to network‑based security events.
Establish and mature network segmentation for sensitive environments (R&D, labs, executive networks, data centers, cloud landing zones), including third‑party and partner access.
Ensure network security controls align with enterprise risk management, regulatory expectations, and internal security policies and standards.
Establish metrics and reporting to demonstrate network security posture, control effectiveness, and continuous improvement to Cyber Defense leadership.
BASIC QUALIFICATIONS
Bachelor’s degree in Information Security, Computer Science, Engineering, or a related field, or equivalent experience.
6+ years of experience in cybersecurity or network security, with demonstrated responsibility for enterprise‑scale network environments.
Proven expertise designing and operating enterprise network security controls (firewalls, segmentation, IDS/IPS, proxies/SWG, VPN/ZTNA).
Experience operating security controls in large, complex, and regulated enterprise environments.
Demonstrated ability to lead cross-functional initiatives and deliver outcomes at scale.
PREFERRED QUALIFICATIONS
Experience in pharmaceutical, biotech, life sciences, or similarly regulated industries.
Experience supporting manufacturing/OT (ICS) security and secure plant connectivity.
Cloud networking and security experience (AWS/Azure/GCP), including transit, peering, private connectivity, and cloud-native controls.
Familiarity with NDR, packet capture, and network telemetry pipelines integrated with SIEM/SOAR.
Professional certifications such as CISSP, CCNP, CISM, GIAC, or equivalent.
Strong analytical and communication skills, with the ability to clearly articulate network security risks and design decisions to senior stakeholders.
Demonstrated experience in an agile work environment possessing qualities such as a collaborative mindset, adaptability to change, and a proactive problem-solving approach.
Please apply by sending your CV in English.
Work Location Assignment: Hybrid
Purpose
Breakthroughs that change patients' lives... At Pfizer we are a patient centric company, guided by our four values: courage, joy, equity and excellence. Our breakthrough culture lends itself to our dedication to transforming millions of lives.
Digital Transformation Strategy
One bold way we are achieving our purpose is through our company wide digital transformation strategy. We are leading the way in adopting new data, modelling and automated solutions to further digitize and accelerate drug discovery and development with the aim of enhancing health outcomes and the patient experience.
Flexibility
We aim to create a trusting, flexible workplace culture which encourages employees to achieve work life harmony, attracts talent and enables everyone to be their best working self. Let’s start the conversation!
Equal Employment Opportunity
We believe that a diverse and inclusive workforce is crucial to building a successful business. As an employer, Pfizer is committed to celebrating this, in all its forms – allowing for us to be as diverse as the patients and communities we serve. Together, we continue to build a culture that encourages, supports and empowers our employees.
Disability Inclusion
Our mission is unleashing the power of all our people and we are proud to be a disability inclusive employer, ensuring equal employment opportunities for all candidates. We encourage you to put your best self forward with the knowledge and trust that we will make any reasonable adjustments to support your application and future career. Your journey with Pfizer starts here!
To learn more about acceptable and prohibited uses of AI during the recruitment process, please review our candidate AI-use guidelines available on Pfizer Careers.

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