Recommended expert
Alexandru Dinu
Senior Security Researcher
Experience
Jan 2017 - Present
9 years 1 monthSenior 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 yearsSenior 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 yearsTeam 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.
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
NativeEnglish
AdvancedEducation
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
Profile
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Frequently asked questions
Do you have questions? Here you can find further information.
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 19 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 6 years and 4 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 (IT), Media and Entertainment and Publishing.
Which business areas is Alexandru most experienced in?
Alexandru is most experienced in business areas like Product Development, Research and Development (R&D), and Information Technology (IT). Alexandru also has some experience in Quality Assurance (QA).
Which industries has Alexandru worked in recently?
Alexandru has recently worked in industries like Information Technology (IT).
Which business areas has Alexandru worked in recently?
Alexandru has recently worked in business areas like Information Technology (IT), Product Development, and Research and Development (R&D).
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.
How to hire Alexandru?
To hire Alexandru, click the Meet button on the profile to request a meeting and discuss your project needs.
Average rates for similar positions
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Market avg: 430-590 €
Market avg: 430-590 €
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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