|
|
Title: |
Systems Administrator
|
Location: |
US-California-San Francisco
|
Work History: |
03/2007 to 02/2008 – English Teacher and Translator
Self-employed – São Carlos, Brazil
Started a small business giving private English lessons and doing highly technical translations in the fields of mathematics and computer science.
02/2006 to 07/2006 – Systems and Network Administration Consultant
Selectica Inc. - San Francisco, California, USA
Responsible for repairing datacenter architecture, testing new technologies and defining how best to scale the datacenter for future growth.
* Ported production database from Solaris to Linux and implemented database redundancy using Oracle DataGuard thus ensuring application performance and reliability.
* Updated aging Snort NIDS, firewall rulesets, VPNs, Big Brother network monitoring systems, Cisco load balancers, RAID devices and NAS servers thus ensuring the future reliability and security of the network.
* Executed extensive performance testing using custom curl scripts to determine the best price point and growth strategy for the next generation of datacenter application servers.
* Created a prototype cluster using Tomcat Workers and bash scripts that allowed for automated deployment of all Java VMs across a set of heterogeneous application servers with built-in failover capabilities, thus increasing the reliability of the application.
* Trained a new hire to manage the system, thus allowing someone in-house to provide on-going support.
11/2000 to 07/2004 – Senior Systems and Network Administrator
Determine Software - San Francisco, California, USA
Responsible for the architecture, security and maintenance of the production and corporate networks and servers.
* Relocated all production hardware from one datacenter to another without interruption to the users, providing an increase in security and a substantial savings in hosting costs.
* Elaborated and tested a multiple incident Disaster Recovery Plan, ensuring the system would continue to function in the event of a catastrophe, thus allaying client concerns of data availability.
* Maintained strict network security using vulnerability scanners, intrusion detection systems, packet sniffers, VPNs and SSL.
* Met rigorous network security and infrastructure audits by @Stake to guarantee that highly sensitive customer data would be secure.
* Ported the online application to a standalone appliance to be installed behind a customer’s firewall. At the same time the application was ported from Linux to HPUX and Windows 2000.
* Tuned the application server, JVM, and Oracle database to dramatically improve system performance without the need for purchasing additional expensive hardware.
01/2000 to 11/2000 – Systems Administrator
MasterKey - San Francisco, California, USA
Both production and corporate networks were heterogeneous (Solaris, Linux and NT). Responsibilities included defining network infrastructure, server management, IT security, Oracle database administration and intern training.
07/1998 to 10/1999 – Founding Partner & Tech Lead
Altnet - São Paulo, Brazil
Provided web application development and technical support for businesses in São Paulo. Responsibilities included technical development as well as small business management. Some notable projects were:
* An online purchasing system for a travel agency integrating an mSQL database.
* An online proficiency test for an English School developed in Javascript.
* Design, development, patenting and fabrication of a device that facilitated the use of multiple hardlocks on a single computer.
06/1996 to 01/1998 – Computer Programmer
Institute of Advanced Technology - Minneapolis, Minnesota, USA
Developed Microsoft training software using the Macromdia Authorware scripting language.
|
Skills: |
Operating Systems: Linux, Solaris, Windows, Cisco IOS, HPUX
Firewalls: Sonicwall, Cisco PIX, Linux iptables, Checkpoint Firewall 1
Languages: shell, bash, sed, awk, perl, SQL, Java, JavaScript, Pascal, XML, CFML, HTML
Internet Applications: Apache, Tomcat, Jrun, Oracle, IIS, Sendmail
Networks: LAN, WAN, TCP/IP, HTTP, HTTPS, SMTP, DNS, SSH, POP3, IMAP, LDAP, FTP, NTP, NFS, SNMP, DHCP, NAT, NAS, Samba, VPN, QoS, HSRP, 802.11
Security: Nessus, Snort, Retina, eTrust AntiVirus
Monitoring: Big Brother, MRTG, Analog, WebTrends, Ethereal, tcpdump, Ntop, logcheck
Other Applications: Twiki, Perforce, CVS, Ghost, VNC, Amanda, Hylafax
Hardware: IBM, Cisco, Sun, Dell
General Skills: performance testing, traffic analysis, vulnerability analysis, high availability, build automation, network monitoring, backups, log management, automated bare-metal installs
|
Education: |
1996 to 1998
University of Minnesota - Minnesota, USA
Major in Computer Science
Major in Philosophy
|
Endorsements
|
 |
Daniel has received 2 endorsements.
|
Daniel has endorsed 0 Members.
|
|
|
| |
Rank |
Title |
Location |
Status |
Actions |
|
1.004 |
Unix Systems Administrator |
US-California-Silicon Valley/San Jose |
 |
Details
|
|
|
1.004 |
Application Developer |
US-California-Los Angeles |
|
Details
|
|
|
|
|
Public Messages
|
|
| From |
Date |
Message |
No public messages. |
|
|
