{"id":2997094,"url":"https://alion.io/job/cosmote-penetration-tester","title":"Penetration Tester","company":{"id":59826,"name":"Cosmote","domain":"cosmote.gr","url":"https://alion.io/company/cosmote","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Career site","truth_index":null},"role":"Security","role_family":"Security","seniority":"junior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Marousi, Greece"],"countries":["GR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":18500,"max_usd":53000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":623},"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Red Teaming","optional":false},{"name":"Unix","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-10-21T11:10:21Z","employer_posted_date":"2026-10-21","last_verified_at":"2026-10-27T20:28:28Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"About the company\nTelekom is Greece’s leading telecommunications and technology company, with the world’s No.1 telecommunications brand, bringing together a legacy built in Greece over more than 75 years with global scale, innovation and expertise.\nDiversity, inclusion, and equality are at the core of our corporate culture.\nThis is why we create an equal working environment in which people can excel through their expertise, professional experience, conscientiousness and responsibility.\nBecome part of our network and let’s create your future together!\nAbout the Role\nAs a member of a team of experienced penetration testers and cybersecurity engineers the candidate will focus on performing security assessments, red teaming, social engineering and penetration tests.\nDuties & responsibilities\nSecurity / vulnerability assessments and penetration tests\nRed teaming and social engineering engagements\nMobile and web applications penetration tests\nComplete projects and tasks on an as needed basis.\nRequired Skills\nBachelor's degree in Computer Science, Telecommunications or a related subject.\nExperience with penetration testing of Web and Mobile Applications, Infrastructure and Vulnerability Assessments on both Windows/Unix worlds\nExperience effectively prioritizing workload to meet deadlines and work objectives.\nGood communication and presentation skills as well as demonstrated ability to write clearly, succinctly, and in a manner that appeals to a wide audience.\nConsultant mindset, commitment to teamwork, and having customer experience as top priority.\nMilitary obligations fulfilled. \nPreferred Skills\nSecurity certifications such as OSCP, OSCE, OSEP, OSWE, CRTP, CRTE etc.\n2+ years working experience in Cyber Security.\nCloud security specialization\nWeb and Mobile applications development experience\nWhat we offer\nAt Telekom, we recognize and reward every effort without discrimination through a wide range of benefits and programs for our people.\nYour benefits\nCompetitive remuneration package\nCafeteria benefits\nCompany mobile and device subsidies\nFixed telephony, Internet and Magenta TV packages\nModern working environment with the equipment and tools required for your role\nYour balance\nFlexible working arrangements\nPrivate insurance for employees and their family members\nFamily Care: maternity, childbirth and parental leave to care for children, above the minimum required by law and provided equally to working mothers and fathers\nYour wellness\nHealth, safety, and wellness programs, including the “The Coach” exercise and wellness platform\nWellness and sports activities\nDietician appointments\nMedical check-ups\nTelekom psychological service\nYour development\nWe foster an empowering culture that encourages our people to seize every opportunity to learn and achieve personal development through:\nUnlimited access to digital learning platforms such as Percipio and Coursera\nVarious face-to-face and customized learning academies\nTalent and rotation programs\nYour onboarding\nVirtual new-hire preboarding and onboarding program\nA buddy to support you during your first months\nPlease note that you will be contacted only if you are shortlisted for an interview. 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