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Sirey Sum Email & Phone Number

Entrepreneur | Startup Mentor | Ex-500 Startups at Reactor School
Location: Phnom Penh, Cambodia, Cambodia 14 work roles 3 schools
1 work email found @500.co LinkedIn matched
✓ Verified Jun 2026 4 data sources Profile completeness 100%

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Work email s****@500.co
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Current company
Reactor School
Role
Entrepreneur | Startup Mentor | Ex-500 Startups
Location
Phnom Penh, Cambodia, Cambodia
Company size
21 employees

Who is Sirey Sum? Overview

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Quick answer

Sirey Sum is listed as Entrepreneur | Startup Mentor | Ex-500 Startups at Reactor School, a company with 21 employees, based in Phnom Penh, Cambodia, Cambodia. AeroLeads shows a work email signal at 500.co and a matched LinkedIn profile for Sirey Sum.

Sirey Sum previously worked as Operations Manager (Cambodia) at Reactor School and Lecturer at Limkokwing Cambodia. Sirey Sum holds Master’S Degree, Master Degree Of Public Policy In Economic Development (Mpp/Ed) (In English) from Park Chung Hee School Of Policy And Saemaul - Yeungnam University - S.Korea.

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Email format at Reactor School

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{first}.{last}@500.co
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Profile bio

About Sirey Sum

Sirey is a Cambodian serial entrepreneur. He is passionate about smart cities, sustainability, technology, and entrepreneurship. Since 2015, Sirey has co-founded several consulting companies, including Green Infrastructure Solutions (an Award Winner of 2018 Greenpreneurs), Sustinat Green (specialized EIA/ESIA company), and Thurawadh (Investment advice). Sirey has developed a unique ability to identify product-market fit, understand political and economic trends, and utilize them for the development of businesses. He has worked as Entrepreneur-in-Residence at 500 Startups (Cambodia) to mentor early-stage tech startups. He is also mentoring a Cambodian team for a global business plan competition in the 2021 Greenpreneur Accelerator Program.At the policy level, he has been invited to provide inputs on sustainable cities in the draft of the National Resources and Environmental Code, and the draft NDC Roadmap for Low-Carbon, Climate-Resilient Buildings and Construction 2050 in Cambodia.Open for cooperation opportunities in Cambodia!

Listed skills include Research, Strategic Planning, Leadership, Sustainable Development, and 20 others.

Current workplace

Sirey Sum's current company

Company context helps verify the profile and gives searchers a useful next step.

Reactor School
Reactor School
Entrepreneur | Startup Mentor | Ex-500 Startups
singapore, singapore
Website
reactor.school
Employees
21
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14 roles

Sirey Sum work experience

A career timeline built from the work history available for this profile.

Operations Manager (Cambodia)

Current
Reactor School

Singapore

Mar 2023 - Present

Lecturer

Current
Limkokwing Cambodia

Phnom Penh, Cambodia

- Teach the course "Environmental Behavioral Study"- Teach the Thesis Prep-course for a master's degree in architecture

Feb 2023 - Present

Entrepreneur In Residence

500 Startups

Phnom Penh, Cambodia

KEY RESPONSIBILITIES- Lead workshops and 1-on-1 mentorship of startups preparing to scale internationally- Support the design and optimization of 500 in Cambodia and program content- Connect startups with potential partners, customers, investors, and talent

Jan 2021 - Jul 2021

Ceo And Cofounder

Green Infrastructure Solutions Co., Ltd - Cambodia

Cambodia

Green Infrastructure Solutions Co., Ltd is an award-winning start-up social enterprise, based in Phnom Penh, Cambodia. We are a green infrastructure and landscape design company, aim to address pressing urban issues of stormwater flooding, lack of green space, and reduce impact of climate change, which hinder resident well-being and quality of life. Green.

Apr 2019 - Jan 2021

Cofounder

Thurawadh Co., Ltd - Investment Advice & Fundraising

#10C, Street 416, Sangkat Tumnup Tik, Khan Chamkar Morn, Phnom Penh, Cambodia

Providing support in market research, advising on brand building (designing logo, writing web content), providing support for developing business plan, overseeing website management, advising on environmental compliance

Jan 2017 - Jan 2021

Lecturer

Limkokwing Cambodia

Phnom Penh, Cambodia

Taught course "Architectural Design 3" in the Faculty of Architectural Design

Nov 2019 - Mar 2020

Professional Fellow

Icma - International City/County Management Association

United States

Through professional fellowship program apart of the Young Southeast Asian Leaders Initiative (YSEALI) 2018, I learnt about city government and environmental sustainability at the Frankfort city, Kentucky, USA. Particularly, my main focuses were on waste management, and green space.

Apr 2018 - Jan 2020

Freelance Market Researcher

Gyeongbuk Pride Product Support Center

Yeungnam University Center For Research Facilities, Korea

Data collection, market analysis

Jan 2014 - Jul 2014

Administration Staff

Sineru Institute

Main duties:- Assist in hiring new staff and internship- Review student and teachers- Preparing academic data- Leading design team for creating advertisement- Review and report promotion results- Review and write articles for website- Prepared meeting agenda and minutes of meeting

Jul 2012 - 2013

Architect

Ray Building Group

Main Duties:- Lead design team- Prepared company profile- Assisted in hiring new staff and internship

Jun 2012 - 2013
Team & coworkers

Colleagues at Reactor School

Other employees you can reach at reactor.school. View company contacts for 21 employees →

RA Rafael Alvaro Reyes Rafael Alvaro Reyes Colleague at Reactor SchoolQuezon City, National Capital Region, Philippines, Philippines View → AS Ashwin Singh Ashwin Singh Colleague at Reactor SchoolSingapore, Singapore View → LK Lee Kwok Yieu Lee Kwok Yieu Colleague at Reactor SchoolSelangor, Malaysia, Malaysia View → TN Tessa Neo Tessa Neo Colleague at Reactor SchoolSingapore, Singapore View → AJ Alyssa Joyce Saguin Alyssa Joyce Saguin Colleague at Reactor SchoolCalabarzon, Philippines, Philippines View → NW Nichavee Wetsawat Nichavee Wetsawat Colleague at Reactor SchoolBangkok, Bangkok City, Thailand, Thailand View → VG Vik Ganesan Vik Ganesan Colleague at Reactor SchoolWP. Kuala Lumpur, Federal Territory Of Kuala Lumpur, Malaysia, Malaysia View → DV Diya Va Diya Va Colleague at Reactor SchoolCambodia, Cambodia View → CY Chhinh Yuttika Chhinh Yuttika Colleague at Reactor SchoolBangkok, Bangkok City, Thailand, Thailand View → TH Tan Hui Lian Tan Hui Lian Colleague at Reactor SchoolSingapore, Singapore View →
3 education records

Sirey Sum education

Master’S Degree, Master Degree Of Public Policy In Economic Development (Mpp/Ed) (In English)

Park Chung Hee School Of Policy And Saemaul - Yeungnam University - S.Korea

Activities and Societies: - Minor degree: Saemaul Undong Theory and Practice- Dissertation: “Korea’s New Town Development Concepts and.

Certificate, Saemaul Training For Students Of Psps, Yeungnam University

Saemaul Undong Center, Korea

Bachelor’S Degree, Architecture And Urbanism

Royal University Of Fine Arts - Cambodia

Activities and Societies: the 1st Competition for Architect Student organized by French Institute of Cambodia with honor of Sir. Vann.

FAQ

Frequently asked questions about Sirey Sum

Quick answers generated from the profile data available on this page.

What company does Sirey Sum work for?

Sirey Sum works for Reactor School.

What is Sirey Sum's role at Reactor School?

Sirey Sum is listed as Entrepreneur | Startup Mentor | Ex-500 Startups at Reactor School.

What is Sirey Sum's email address?

AeroLeads has found 1 work email signal at @500.co for Sirey Sum at Reactor School.

Where is Sirey Sum based?

Sirey Sum is based in Phnom Penh, Cambodia, Cambodia while working with Reactor School.

What companies has Sirey Sum worked for?

Sirey Sum has worked for Reactor School, Limkokwing Cambodia, Sustinat Green Co., Ltd - Eia Consulting Firm In Cambodia, 500 Startups, and Green Infrastructure Solutions Co., Ltd - Cambodia.

Who are Sirey Sum's colleagues at Reactor School?

Sirey Sum's colleagues at Reactor School include Rafael Alvaro Reyes, Ashwin Singh, Lee Kwok Yieu, Tessa Neo, and Alyssa Joyce Saguin.

How can I contact Sirey Sum?

You can use AeroLeads to view verified contact signals for Sirey Sum at Reactor School, including work email, phone, and LinkedIn data when available.

What schools did Sirey Sum attend?

Sirey Sum holds Master’S Degree, Master Degree Of Public Policy In Economic Development (Mpp/Ed) (In English) from Park Chung Hee School Of Policy And Saemaul - Yeungnam University - S.Korea.

What skills is Sirey Sum known for?

Sirey Sum is listed with skills including Research, Strategic Planning, Leadership, Sustainable Development, New Town Planning, Saemaul Undong, Project Management, and Policy Analysis.

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