Alexandru Dinu - Senior Security Researcher

Q: Where is Alexandru based?

Alexandru is based in Bucharest, Romania .

Q: What languages does Alexandru speak?

Alexandru speaks the following languages: Romanian (Native), English (Advanced) .

Q: How many years of experience does Alexandru have?

Alexandru has at least 20 years of experience. During this time, Alexandru has worked in at least 3 different roles and for 3 different companies . The average length of individual experience is 7 years and 6 months . Note that Alexandru may not have shared all experience and actually has more experience.

Q: What is Alexandru's latest experience?

Alexandru's most recent position is Senior Security Researcher at Secureworks (Sophos) .

Q: What companies has Alexandru worked for in recent years?

In recent years, Alexandru has worked for Secureworks (Sophos) .

Q: Which industries is Alexandru most experienced in?

Alexandru is most experienced in industries like Information Technology and Media and Entertainment .

Q: Which business areas is Alexandru most experienced in?

Alexandru is most experienced in business areas like Product Development , Research and Development , and Information Technology . Alexandru also has some experience in Quality Assurance .

Q: Which industries has Alexandru worked in recently?

Alexandru has recently worked in industries like Information Technology .

Q: Which business areas has Alexandru worked in recently?

Alexandru has recently worked in business areas like Information Technology , Product Development , and Research and Development .

Recommended expert

Bucharest, Romania

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Experience

Jan 2017 - Present

9 years 7 months

Senior Security Researcher

Secureworks (Sophos)

Performed malware analysis and engineered EDR countermeasures, including YARA signatures and memory-based techniques, to mitigate advanced threats.
Developed detections across multiple telemetry sources such as process execution, network traffic, authentication events, and script activity, enabling rapid identification of malicious behaviors and persistence mechanisms.
Leveraged AI techniques to research and automate the development of detection rules and used Jupyter notebooks to query large datasets, identify patterns, generate statistical insights, and correlate anomalies across tenants.
Conducted threat hunting across endpoint and network environments, supported incident response teams, contributed to CERT initiatives, and collaborated with data science efforts to investigate persistence techniques, ransomware detection, and command-and-control identification.

Jan 2014 - Dec 2017

4 years

Senior Security Analyst

Adobe

Led incident response and triage for enterprise-level security events, analyzing cloud provider logs, OS configurations, and network flows to detect risks.
Investigated suspicious activity in SIEM platforms, authored detection rules, and performed forensic analysis of memory, logs, and malware samples.
Conducted APT hunting, evaluated and deployed security tools, and partnered with engineering teams to onboard and monitor specialized environments.

Jan 2007 - Dec 2014

8 years

Team Leader & Virus Researcher

Avira

Started as a virus researcher and then directed a malware support team while providing Level 3 technical expertise, leading quality assurance efforts, and overseeing the virus definition update process.
Conducted malware research and reverse engineering, producing threat descriptions, analyzing rootkits, and testing obfuscation and encryption techniques.
Delivered technical content, collaborated across departments, and utilized tools such as IDA Pro, OllyDBG, Wireshark, Fiddler, and Volatility to analyze malware behavior and network traffic.

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology and Media and Entertainment.

Information Technology

Media and Entertainment

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Product Development, Research and Development, Information Technology, and Quality Assurance.

Product Development

Research and Development

Information Technology

Quality Assurance

Summary

Cybersecurity Professional with 19 years of experience in threat detection, incident response, malware analysis and phishing research. Skilled in leveraging AI/ML for anomaly detection, conducting threat hunting and leveraging threat intelligence to strengthen defenses. Proficient in Python, Jupyter Notebooks, AWS, SIEM, EDR, YARA, and Splunk, with experience collaborating with data science/engineering teams to refine detection models and automate security workflows. Developed a growing passion for email security.

Skills

Threat Detection & Response
Malware Analysis
Siem, Edr & Yara
Email Security Research
Ai-Assisted Detection Engineering
Threat Hunting & Ti
Python & Pandas
Virtualization
Cloud Security

Languages

Romanian

Native

English

Advanced

Education

Oct 2008 - Jun 2010

Polytechnic University of Bucharest

MSc in Intelligent Leading Systems · Intelligent Leading Systems · Bucharest, Romania

Oct 2003 - Jun 2008

Polytechnic University of Bucharest

BEng in Computer Engineering, Automatic Control · Computer Engineering, Automatic Control · Bucharest, Romania

Certifications & licenses

GPYC – GIAC Python Coder

GIAC

GPEN – GIAC Penetration Tester

GIAC

GREM – GIAC Reverse Engineering Malware

GIAC

Avira

Statistics

Experience

Total positions 3

Experience in Information Technology 19.5 y

Avg length 7 y 1 m

Longest experience 9 y 6 m

Expertise

Recent roles Senior Security Researcher, Senior Security Analyst, Team Leader & Virus Researcher

Main industries Information Technology, Media and Entertainment

Main business areas Product Development, Research and Development, Information Technology

Qualifications

Highest degree Master

Certifications earned 4

Profile

Created

October 2025

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Frequently asked questions

Have questions? Find more information here.

Where is Alexandru based?

Alexandru is based in Bucharest, Romania.

What languages does Alexandru speak?

Alexandru speaks the following languages: Romanian (Native), English (Advanced).

How many years of experience does Alexandru have?

Alexandru has at least 20 years of experience. During this time, Alexandru has worked in at least 3 different roles and for 3 different companies. The average length of individual experience is 7 years and 6 months. Note that Alexandru may not have shared all experience and actually has more experience.

What roles would Alexandru be best suited for?

Based on recent experience, Alexandru would be well-suited for roles such as: Senior Security Researcher, Senior Security Analyst, Team Leader & Virus Researcher.

What is Alexandru's latest experience?

Alexandru's most recent position is Senior Security Researcher at Secureworks (Sophos).

What companies has Alexandru worked for in recent years?

In recent years, Alexandru has worked for Secureworks (Sophos).

Which industries is Alexandru most experienced in?

Alexandru is most experienced in industries like Information Technology and Media and Entertainment.

Which business areas is Alexandru most experienced in?

Alexandru is most experienced in business areas like Product Development, Research and Development, and Information Technology. Alexandru also has some experience in Quality Assurance.

Which industries has Alexandru worked in recently?

Alexandru has recently worked in industries like Information Technology.

Which business areas has Alexandru worked in recently?

Alexandru has recently worked in business areas like Information Technology, Product Development, and Research and Development.

What is Alexandru's education?

Alexandru holds a Master in Intelligent Leading Systems from Polytechnic University of Bucharest and a Bachelor in Computer Engineering, Automatic Control from Polytechnic University of Bucharest.

Does Alexandru have any certificates?

Alexandru has 4 certificates. Among them, these include: GPYC – GIAC Python Coder, GPEN – GIAC Penetration Tester, and GREM – GIAC Reverse Engineering Malware.

What is the availability of Alexandru?

Alexandru is immediately available part-time for suitable projects.

What is the rate of Alexandru?

Alexandru's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.