129 development assistant jobs at 91 companies in San Jacinto, CA

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Training Development Assistant
Camp Pendleton, California, United States
$69k-$158k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
7+ YOE7+ years experience in SIGINT/EW/cyberspace operations/DNEA/crypto-linguistics (USMC or joint setting), training design and curriculum development, knowledge of USMC doctrine, scenario-driven exercise development, ability to travel up to 25%, TS/SCI clearance, HS diploma/GED, specific RPT certifications.
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Training Development Assistant
Camp Pendleton, California, United States
$69k-$158k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
7+ YOE7+ years experience in SIGINT, EW, cyberspace operations, DNEA, or crypto-linguistics; TS/SCI clearance; HS diploma/GED; training design and curriculum development experience; ability to travel up to 25%.
1w
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Assistant Director/ Associate Director, Pharmaceutical Development
Carlsbad or Boston or Dublin
$93k-$190k/yr OnsiteFull Time
Ionis Pharmaceuticals
Ionis PharmaceuticalsNASDAQ: IONS: Discovers and develops RNA-targeted medicines for serious diseases.
3+ YOEExperienced drug product development professional to author and coordinate CMC content for global regulatory submissions; strong scientific writing, regulatory knowledge, and cross-functional coordination required.
1w
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Student Community Development Assistant- University Village #721860226
Pomona, California, United States
$17/hr OnsitePart Time
Cal Poly Pomona Foundation
Cal Poly Pomona Foundation: Auxiliary organization providing support services for Cal Poly Pomona.
Currently enrolled student, high school diploma/GED, ability to work 16–20 hours/week, strong communication, event programming and community engagement skills, ability to adhere to schedule.
Discord, Instagram
1w
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Business Development & Social Media Assistant
Eastvale, California, United States
$20-$25/hr OnsiteFull Time, Part Time
Torchstar
Torchstar: Distributor of residential and commercial lighting products and solutions.
Outgoing communicator able to make outbound calls, engage contractors, create social media and video content, appear on camera, use AI tools and CRM, and maintain sales records; training provided.
Microsoft Office, Google Workspace, CRM
2mo
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Child Development Program Assistant I/Applicant Pool
Claremont, California, United States
OnsitePart Time
Claremont Unified School District
Claremont Unified School District: Provides public K-12 education and student support services.
Resume and one letter of recommendation.
1mo
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Learning & Development Project Assistant
Pomona, California, United States
$17/hr HybridPart Time
Associated Students, Inc. Cal Poly Pomona
Associated Students, Inc. Cal Poly Pomona: Operates recreational facilities and student services for Cal Poly Pomona.
Part-time student role (12–20 hrs/week), hybrid eligible. Supports learning projects; requires strong organization and communication, familiarity with Monday.com and Microsoft Teams, data tracking skills, ability to pass a background check, and status as an enrolled Cal Poly Pomona student eligible to work.
Monday.com, Microsoft Teams
2mo
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Instructional Assistant
Escondido, California, United States
OnsiteFull Time
Growing Minds Early Education Programs
Growing Minds Early Education Programs: Non-profit provider of early childhood education and childcare services.
Assist the master teacher in a classroom for ages 0-5; support development, literacy, health, and family communication; implement lesson plans; ensure safety and staff/child ratios; participate in professional development.
1w
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Assistant Director of Staff Development/Scheduler (CA, Menifee, Menifee Lakes Post-Acute)
Menifee, California, United States
OnsiteFull Time
Anaheim Healthcare Center
Anaheim Healthcare Center: Provides skilled nursing, rehabilitation, and memory care services.
Plan, organize, develop and direct in-service educational programs for facility staff in accordance with federal, state and local regulations.
2mo
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Maintenance Assistant
Riverside, California, United States
$18-$20/hr OnsiteFull Time
Reliant Management
Reliant Management: Manages operations and billing for skilled nursing facilities.
0+ YOEDirecting maintenance operations, developing policies, preventive maintenance, inspecting facility and equipment, supervising department personnel, record-keeping, budgeting and staffing assistance.
2mo
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Restaurant Assistant Manager
Menifee or Riverside County or San Diego County
$52k/yr OnsiteFull Time
Placido/Faulkner Network
Placido/Faulkner Network: Operates a network of franchised coffee and donut shops.
Oversee store operations, coach and develop shift leads and crew, ensure operational and food safety standards, assist with recruiting/onboarding, and work variable hours including early mornings, evenings, weekends and holidays; food handler card required.
2mo
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ASSISTANT TODDLER TEACHER
Laguna Niguel, California, United States
$21/hr OnsiteFull Time
Kensington Montessori Schools
Kensington Montessori Schools: Operates a Montessori-based preschool and toddler care center.
Assist lead teacher in toddler classroom; strong understanding of child development, classroom management, and safety; excellent communication; minimum 3 ECE units (willing to complete up to 12).
3w
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Assistant Store Manager
Carlsbad, California, United States
$20-$30/hr OnsiteFull Time
Ross Stores
Ross StoresNASDAQ: ROST: Discount retail chain selling brand-name apparel and home fashions
2+ YOETwo+ years store or assistant manager retail experience; supervise and develop associates; manage scheduling, payroll, inventory, safety, customer service, and loss prevention; ability to work evenings and weekends.
PDTs, registers, PC
6d
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Research Assistant
Claremont, California, United States
$19/hr OnsitePart Time
Keck Graduate Institute
Keck Graduate Institute: Private graduate institute specializing in applied life sciences education.
Master's in related field required; prior experience with AI and molecular dynamics (MD) simulation and laboratory/biological modeling; strong computer and writing skills; attention to detail; occasional evenings/weekends.
2mo
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CSTEM Graduate Research Assistant (Fall 2026)
San Marcos, California, United States
$3k-$6k/mo OnsitePart Time, Temporary
California State University
California State University: Public university system providing higher education and academic research.
Must be a registered CSUSM graduate student with equivalent completion of a bachelor's degree; able to assist faculty with research and technical duties, relate well in academic settings, and supervise/train students. Must be able to work in California.
3w
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Assistant Teacher (Waddler/Toddler/Preschool) (Escondido)
Escondido, California, United States
OnsiteFull Time
Heartbeat Music & Performing Arts Academy
Heartbeat Music & Performing Arts Academy: Offers arts-integrated preschool and performing arts education for youth.
Child Development Assistant Permit (or equivalent), CPR/First Aid and Mandated Reporter training; infant/toddler coursework for those assignments; supports classroom activities, supervision, and documentation.
1w
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Middle School Assistant Coach - Flag Football
Menifee, California, United States
OnsitePart Time
Santa Rosa Academy
Santa Rosa Academy: Public charter school providing K-12 site-based and home study programs.
Assist and supervise athletic activities and practices, develop athletes' skills and sportsmanship, coordinate schedules/rosters, monitor eligibility, maintain equipment records; pre-employment clearances required.
3w
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Dental Assistant
Laguna Hills, California, United States
$19-$27/hr OnsitePart Time
PDS Health
PDS Health: Provides administrative and business support services to dental practices.
Required industry certifications and education, knowledge of dental terminology and instruments, strong time management and communication, teamwork, and interest in skill development.
2mo
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Dental Assistant
Corona, California, United States
$19-$27/hr OnsiteFull Time
PDS Health
PDS Health: Provides business and administrative support services to dental practices.
Requires industry certifications/education, knowledge of dental terminology, instruments and equipment, strong time management, communication, teamwork, and interest in skill development.
3w
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Service Leader/ Assistant restaurant Manager
San Juan Capistrano, California, United States
$27-$29/hr OnsiteFull Time
The Stand
The Stand: Operates a chain of fast-casual American restaurants.
1+ YOE1+ year restaurant/assistant management experience, age 21+, full-time availability including weekends, strong communication and leadership for shift ownership and team development.