Darrell Cadwallader

356 8^th St., Atlantic Beach, FL 32233 

darrell2013@cadwallader.cc • 813-600-8767 • darrell.cadwallader@gmail.com

Infrastructure Engineering – Administrator/Supervisor/Manager

Ambitious, versatile and dedicated IT management professional with a strong background in system administration, security administration, technical writing, Internet content development, and technical support. Proven ability to evaluate, design, and implement effective training programs, appraise client / project requirements, accurately assess issues, and develop innovative solutions to resolve and accomplish all goals and objectives on-time and within budget. Skilled project leader; able to direct multiple tasks effectively and master innovative leading edge software and hardware tools.

Core Competencies:

•       System Administration •       Migrations/Consolidations •       Performance Tuning •       TCP/IP Administration •       AIX, Solaris, SCO, RHEL

•       IT System Restructuring •       Test Development & Execution •       Enterprise Backup Solutions •       Legacy Application Renewal •       Fedora Core, Tru64, HP-UX

•       ePortal Strategies •       Access Control •       Intrusion Detection / Security •       Team Building & Leadership •       VMware Virtualization

 

Senior UNIX Systems Administrator – HCL America                                                                 2013-Present

 

Resuming my role managing the transition to the new managed services provider for Adecco NA in a consultant position with HCL America. My primary focus has been managing a TRU64 cluster running PeopleSoft, and maintaining the company’s Redhat/Oracle Enterprise Linux environment. I work had in hand with offshore AIX administrators managing ~60 p570/p770 clusters, and assist managing the storage environment.

 

Senior UNIX Systems Administrator – Enterprise Integration                                                         2012-2013

 

Sole UNIX administrator supporting ~60 AIX, CentOS, Redhat and Oracle Enterprise Linux and legacy Tru64 servers of company’s primary account as a managed service provider.  Hired specifically in an SME capacity to ease transition of client account to an offshore MSP. Manage and administer AIX 5.3 TL12/Oracle RAC 11G R2 Clusters and storage devices (NetApp v3170 Filer, Hitachi NSC, AMS500, AMS1000, HP EVA/MSA, HP/Brocade switches). Hardware and OS support for SOA/BPEL, PeopleSoft servers. Document standard operating procedures, participate in the Change Advisory Board. Provide Windows system administration as required.

 

Key Achievement: 

§         Within three weeks on the team, a compromised SFTP/SCP server used for distributing malware, MP3 and MP4 files was discovered. Logging information and Google searches showed that the server had been penetrated as early as 2007. The environment was rebuilt in a virtual machine with CentOS. A ‘chroot jail’ to lock down access was employed, and all unnecessary daemons were disabled running on the server. 12 character passwords for all 70 accounts with 180-day expiration dates were implemented. A request with the networking/firewall team to block access from all known Chinese- and Russian-based IP addresses was submitted.

 

UNIX Systems Administrator (LAMP) – First Advantage Corporation                                              2009-2011

 

Assigned as an Infrastructure Support UNIX Administrator for the Advanced Biometrics Group of First Advantage. With a loose design specification and no legacy documentation, the Fingerprinting and I-9 classification platform was migrated from five physical servers with a FreeBSD OS to a virtual server environment (VMware) with nine servers running CentOS 5.5 OS. This was a time-sensitive data center migration from Savvis in Los Angeles to CoreLogic’s Poway data center.

 

Key Achievements:               

§         The entire ABG platform from the preparation/planning phase to “go-live” was completed in under four months. This included hardware specification, procurement, installation on-site, and gradual migration of approximately 1.7T of a MySQL database, web and mail (Postfix) server, client integration and four “store-and-forward” servers used by federal law enforcement agencies (FBI, FDLE), banking institutions (Bank Of America, Wells Fargo), and Florida state school systems and Dioceses.

§         Once the environment was moved into production there was an immediate 40% increase in the amount of fingerprint processing daily from the previous platform.

§         A Disaster Recovery site in FADV’s Indiana data center was built and was operational using similar hardware in less than three weeks.

 

Projects:

§         A second data center migration from CoreLogic’s data center to Tampa-based Peak10. The hardware is in place at this time. VPN connectivity to the FBI’s processing center is currently a bottleneck for the completion of this project.

§         Testing fail-over of the DR site from production is in planning phases.

§         Producing documentation of platform construction, processes and “lessons learned” information.

§         Migrate development/QA and staging environments from physical to virtual servers using current production platform.

 

ePortal / UNIX Production Support Supervisor – Sage Software Healthcare Division

Manager – Infrastructure Engineering – WebMD / Emdeon Practice Services Tampa, FL              2004 – 2009

Held responsibility as WebMD/Emdeon’s IT Manager for planning and executing the migration of legacy hardware, operating systems, and application support. Assumed additional management responsibility after merger with Sage Software, managing the day-to-day activities of four senior UNIX and two contract WebSphere administrators. Coordinate and lead multiple concurrent projects as primary point of contact, responsible for analyzing project specifications, hiring administrative support / development staff, allocating tasks, leading meetings, and devising solutions. Maintain open communication with department heads, project managers, and senior level administrators. Proficiently generate and maintain IE support documentation.

Key Achievements:               

§         Successfully developed strong team through effectively performing all management duties such as hiring personnel, training and staff development, setting priorities, and resolving conflicting issues.

§         Spearheaded development and growth of ePortal (WebSphere 5.1) operations from eight users to over 135 physician practices in first twelve months of operation. Environment consisted of two application servers, two web servers, a single database (DB2) server and NDM and standby database (internal), two external DMZ web servers with failover and load balancing via f5s.

§         Hand-picked by senior management to lead server consolidation project team, streamlining over 400 UNIX servers in 6 WebMD datacenters to a single, staging facility in preparation for final destination to QTS in Suwanee, GA. Evaluated each server as datacenters closed and were shipped to make a determination to upgrade hardware, virtualize to VMWare ESX / ESXi servers (SCO/RHEL), prep for consolidation or EOL (end-of-life).

§         Credited for saving $72K a year in operational costs by migrating and consolidating over 300 POTS lines nationally into a single solution with a DR disaster recovery plan.

§         Managed over 275 UNIX servers and supporting multiple operating systems (AIX, RHEL, Fedora Core, SCO UNIX, Sun Solaris). Provided pre- and post-development support for a separate remote R&D facility.

§         Built Rivermine Telecom billing application with an Oracle 10g database on a virtual machine using Red Hat Linux ES4 (JDK 1.5, Tomcat 5.5, Apache Ant 1.6.5, Oracle 10g JDBC driver, Apache HTTP Server 2.0.54).

§         Siebel application migration from Sun SunFire boxes to pSeries servers of Emdeon’s corporate site in Nashville, TN to QTS in Suwanee, GA. The new environment consists of a Siebel production server (p570), Softtrax database (p560), Oracle external DMZ (p510), Oracle test (p52a), Kronos/Cognos (p55a), Oracle applications (p560) running AIX 5.1L. All servers are maintained via an AIX Hardware Management Console (HMC) at QTS from Sage’s Tampa offices.

§         Managed designated SLA’s, maintaining a 99.9% uptime for all UNIX Production support (SCO UNIX, RHEL, AIX) systems.

§         Improved operational efficiency by serving as front-line liaison regarding new and future UNIX development projects, defined project scope and requirements to meet objectives.

§         VMWare virtualization of  SCO UNIX, RHEL 3, 4, 5 and Fedora Core Linux servers running Medical Manager and legacy support applications.

§         Provided detailed documentation, standards and policies in a SharePoint Portal, creating new processes to build strong UNIX operation teams.

§         Proactively structured departments new hiring / evaluation / training procedures and to direct all phases of project development, qualification, and quality assurance testing.

UNIX Systems Administrator

PSCU Financial Services, Inc., St. Petersburg, FL              2001 – 2003

Adaptec, Inc.,/Distributed Processing Technology, Inc., Maitland, FL              1998 – 2001

Orchestrated and deployed key technical security operational processes and procedures to protect PSCU credit unions online financial information and banking products. Researched third party hardware and software products, purchasing over $5M in Sun equipment including; 37 Sun Netra t105, AC200, and SunFire v100 / v120 servers. Held accountability for capacity planning and performance tuning of mid-range and enterprise level systems to support Oracle databases, Siebel, Lawson and SAS CRM/HR applications. Provided key technical leadership in supporting all online operations.

Key Achievements:

§         Championed launch for eliminating most of the day-to-day administrative tasks, by automating various applications through development of a number of UNIX scripts.

§         Successfully coordinated the atomization of a secure file transfer process migrating transactional logs from middleware boxes to a protected server.

§         Drove project to configure and install Redhat Linux 7.0 on two Compaq Proliant servers as backup FTP and DNS servers, and construct Sun E450 with internal RAID-5 for Oracle production database for BRP site in Phoenix for PSCU Financial Services.

§         Credited for planning, evaluating and recommending purchase of Novell Borderware firewall to reduce distributed denial-of-service attacks on Adaptec’s primary web servers and FTP sites.

§         Evaluated, recommended and specified the purchase of two Sun Ultra 420R compute servers to support ASIC design group. Configured standard RAID-5 ASIC hardware production environment.

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