Greisly Contreras

***** ** **** *** ***** FL ****5 Mobile: 786-***-**** Email: adb0gr@r.postjobfree.com Education

Certifications

● CompTIA A+

● CompTIA Security+

● Cisco Certified Network Associate (CCNA)

Alejandro of Humboldt University Caracas, Capital District, Venezuela 2015

● Diploma in Project Management

UNEFA Caracas, Capital District, Venezuela 2012

● Systems Engineer

Technical Skills

● High knowledge of Cisco routers and switches, WAN/LAN connectivity, ACL, firewall and security.

● Knowledge of server services and protocols (Email, Web, FTP, DHCP, DNS)

● Operating Systems: MAC OS X, Windows and Linux- based OS server and desktop editions.

● Knowledge in different methodologies: agile SCRUM and ITIL.

● Languages: English and Spanish

Experience

Change Analyst Telefónica USA 4/2019 - 2/2020

· Support for voice applications: Webex and Jabber, handling the ticket system in SNOW, Remedy and Salesforce.

· Accomplishment the SLA of changes and services request

· Create, follow up and close change tickets, complying with ITIL methodology.

· Provide Customer service and effectively communicates current status to the customers. Technical Support Specialist Azulle 6/2018 - 4/2019

· Installation, configuration and maintenance of the LAN/WAN network.

· Test defective devices for diagnosing and solving hardware or software faults

· Install different operating systems (Windows desktop and server, OS X and Linux- based OS)

· Ensure the highest levels of customer service handling the ticket system. Referral Coordinator Grand Health Institute Referral Coordinator 8/2016 - 6/2018

· Troubleshooting system and network problems in the office.

· Verify and maintain insurance information as well as sensitive patient records (HIPAA).

· Submit prior authorization for sleep study patients and follow up for status. Functional Analyst Equipment and Systems, Hidrocaven 2012 - 2015

· Ensured project compliance using SCRUM methodology.

· Ensured high level communication between clients and the systems department.

· Provided system analysis and design as well as test case analysis and design.

· Handled Applications support as well as end-user training.