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Executive Assistant & HR/Legal Support Leader

Location:
San Pedro, CA
Posted:
January 12, 2026

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Resume:

Stella L. Mastriona

310-***-****

*****.*******@***.***

Organized, high energy, results oriented Executive Assistant / Human Resources Management / Legal Assistant professional. Skilled at being diplomatic and tactful at all levels while maintaining a high level of confidentiality. A motivated team player with a proven track record in providing efficient executive administrative support. Key strengths include:

* Excellent interpersonal skills * Innovative

* Self-motivated * Multi-task oriented

* Attention to detail * Consistency in meeting deadlines

* Flexible * Leadership

SUMMARY

Advanced administrative support experience as an Executive Assistant / Senior Executive Assistant to CEOs and high-level executive staff members. Organized, high energy, results oriented executive administrative support / Human Resources Management / Legal Secretary Professional. Skilled at being diplomatic and tactful at all levels while maintaining a high level of confidentiality. A motivated team player with a proven track record while providing efficient administrative support. Key strengths include: “Excellent interpersonal skills, self-motivated, attention to detail, flexible, innovative, multi-tasked oriented, consistency in meeting deadlines, leadership”. EMPLOYMENT Allied Healthcare FCU (Southland CU) 2/2021 – 12/2024 Assistant to President/CEO – HR Specialist

Oceanwide Repair 9/2019 - 7/2020

Office Administrator

Westco Smart Homes 3/2013 – 3/2019

Assistant to President / Owner

CPA Firm 10/2012 = 11/2012 -

Administrative Assistant / Receptionist

Pacific Ethnography Company 7/2011 – 10/2012

Executive Assistant to CEO / Operations Manager

EMPLOYMENT Sr. Executive Assistant - Executive Assistant - Administrative Assistant- POSITIONS HR Manager - HR Assistant - Office Manager - Accounts Payable / Accounts Receivable - Payroll Administrator - Office Administrator - Receptionist - Operations Manager - Legal Assistant - Investor Relations - Property Management Assistant.

ADMINISTRATIVE SUPPORT Executive Assistant to high level Executives (20+ years) - Company Presidents and Owners - Corporate Legal Counsel -Executive Assistant to Senior Staff Members - Board of Directors as required. ACCOUNTING Payroll Administrator - Customer Invoicing -, Accounts Payable - Accounts Receivable - Credit Card Reconciliation - Banking -. Validated and processed expense reports. Managed departmental budgets and reporting to department manager.

HUMAN RESOURCES Created an HR department for a technology start-up company - created a 30-page Employee Handbook from a 3-page memo - developed an Employee Performance Review system - hiring personnel - set up HR reference library for employees and managers.

INVESTOR RELATIONS Created an Investor Relations department for a technology start up company. Maintained investor files - point of contact for investor customer service. Participated in quarterly conference calls for investors and worked closely with CFO to prepare for the calls. OFFICE MANAGEMENT Receptionist duties (answered incoming calls - greeted and directed guests) - maintained front office appearance. Managed and follow through of needed maintenance including office equipment - office set up / expansion projects. Researched and hired maintenance vendors. Managed office telephone systems installations and repairs. TRAVEL Arranged extensive travel plans for Executive Staff members. Researched and compiled information to create a corporate travel policy. Maintained solid relationships with hotel management staff(s). PROPERTY Direct contact for tenants’ maintenance requests - collected monthly MANAGEMENT rent payments - prepared and updated spreadsheet for property owners’ information. Kept track of rent increases and 30 notices to tenants. Prepared notices to tenants for Rent Control Annual inspection. Worked closely with maintenance vendors to ensure quality workmanship. Processed prospective tenant background checks and presented qualified tenants to owners. Rent payments banking. Researched rent control requirements to have owners receive monthly payments from tenants for expense reimbursement of new roof installation.

LEGAL Provided administrative support to Corporate Legal Counsel - Paralegals - prepared Contractor Agreements for Graphics Department and HR Department. Researched and presented vendors for due diligence vendors to senior staff. Provided clerical support for M&A due diligence projects.

EDUCATION Central Business College (Denver, CO) – Associates Secretarial Degree UCLA Extension – Human Resources Certification Program Numerous HR and Administrative related seminars and training courses

TECHNICAL SKILLS Microsoft Office 2003, 2007, 2010 Microsoft Office for Mac 2011

ADP Report Smith / Payroll

Gregg Shorthand

HR Vantage (Database)

QuickBooks (check preparation, customer invoicing, journal entry) Intuit Payroll

Symitar

iCIMIS (recruiting service)

Indeed.com (4 years company recruiter)

EMPLOYMENT ACCOMPLISHMENTS / AWARDS / PROMOTIONS

Researched and established a 30-page Employee Handbook from a 3-page memo. Promoted from Executive Assistant President / CEO to Human Resources Manager (Trinagy). Built HR department. Earned Presidents Award (2001). Hired 80 new employees within 3 months to grow a start-up company (Trinagy). Maintained

$1.7M quarterly budget for large software company (Symantec). Promoted from Executive Assistant to EVP of Peter Norton Group to Senior Executive Assistant to CEO (Symantec). Set up and maintained an Investor Relations department for software start-up company (Cybermedia). Liaison for employees and health insurance provides (Trinagy). Managed accounts payable process via Symitar including setting up new clients. I cleaned up the system, never let accounts obtain late fees and closed two telephone accounts that were repeat services.



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