daring. enterprising. innovative.

Let us help propel your business into the next stratosphere, or just the next continent to start. 

With our vast networks, mature global strategic alliances and headquarters in New York City, offices in San Francisco, Seattle, Amsterdam, Berlin, and Singapore, as well as associates in Sao Paulo, London, Hong Kong, and Tokyo; SEIKOURI has people and tools in place to make your business the tour de force you want and quite possibly more than you imagine.


SEIKOURI is a privately held international strategy consulting group headquartered on the corner of East 41st Street and Madison Avenue in Midtown Manhattan, only one block away from Grand Central Terminal and Bryant Park. Founded in 2008, SEIKOURI is wholly owned and operated by the management team, and we are proud to say profitable since year one.

At SEIKOURI, we believe in diversity and inclusiveness in the workplace as an integral part of serving our clients and developing our people. Only the highest-performing teams, which maximize the power of different opinions, perspectives, and cultural references, will succeed in the global marketplace. Diversity is what drives better insights, better decisions, and better products. It is the backbone of innovation.

What We Do

Leadership Team

Markus Brinsa

President & CEO | Founder

The goal is always to strive for the best things in life, while not doing without the good things.

The only way is up. Markus is in charge of international business development, alliances, and sales projects. He served in different roles in business and alliance development, sales and strategic consulting. Among others, he was Board Member at ACE TOMATO AG (IT Security Consulting), Chief Revenue Officer at Drivve LLC (Cloud DMS), Executive Senior Vice President of North America at Paessler AG (Network Monitoring), Vice President Global Alliances at Jedox AG/Inc. (BI & CPM), Advisory Board Member at pleasureGuest LLC (Hospitality), Lead Advisory Board Member at award-winning online booking technology provider APPOINTEDD/Saloca Ltd. and member of the Board of Directors at Attributy Inc. (AI-driven Campaign Optimization). Languages: English, German

Akiza Best

SVP | GM SEIKOURI Singapore Pty Ltd.

Have no fear of perfection. You will never reach it.

Based out of Singapore, Akiza is in charge of expanding SEIKOURI's business in Southeast Asia. She graduated with a Master’s degree in Computer Science at the University of Tokyo and holds an impressive bunch of various high-level technical certifications from the IT-Security industry. During the last 10 years, she supported several North American security solution providers with their market entry in Southeast Asia. As a child, Akiza lived in Japan, Korea, China, and Brazil, before moving to Singapore at the age of 14. Languages: Japanese, Korean, Mandarin Chinese, English, Portuguese.

Chad Applebaum

CFO | SVP Consulting

If you are afraid of the future, then get out of the way, stand aside.

Ariel «Chad» Appelbaum joined SEIKOURI in January 2020.
In addition to his CFO role, Chad leads the consulting team as Senior Vice President.
Over the last 30 years, Chad developed dozens of tech businesses from startup-stage into multimillion-dollar businesses as investor, advisor, business strategy developer, M&A expert, and CFO.
Chad holds a Master of Science in Financial Economics from Columbia Business School New York. Chad lives in Brooklyn, NY. Languages: English

Jimmy Sashimoto

SVP Marketing & Communication

The very first law in advertising is to avoid the concrete promise and cultivate the delightfully vague.

Jimmy specializes in mobile solutions, social collaboration and social media. He is an Apple OS X and iOS evangelist. He wears many hats including consultant, UI designer and marketing executive. Born and raised in Fukuoka, Japan; Jimmy spent three years in Australia before moving to California in 1998. Jimmy was the Founder & CEO of 2100b Sausalito LLC, a consulting company specializing in Digital Strategy development, which was acquired by SEIKOURI in 2014. He holds a Master's in computer science from EECS at UC Berkeley. Jimmy lives in Sausalito, CA. Languages: English, Japanese

Strategic Partners

Everything starts with an idea. Not necessarily.
Often, business ideas are a combination of thoughts, experiences, visions and things that influence us. Let us help you making sure that your business idea is a great idea.
ubermutig is an independently owned digital creative agency residing in Brooklyn's "Digital DUMBO" area.

The offering includes individual Executive Coaching as well as Training and Facilitation Sessions like Business Etiquette, Local Customs, Customer Service and Relationship Management, Leadership Development, Interpersonal Relationships and Cross-Cultural Dynamics, Stress Management, Product Roadmap, and Core Values, Culture & Happiness at Work.

Strategic Coaching is provided by ROCeteer Inc., a company that is committed to unleashing the potential of entrepreneurial ecosystems through a combination of coaching, mentoring and training. ROCeteer was founded in Las Vegas with Mark Rowland and Tony Hsieh (✝︎) as investors and works with individuals, teams and communities to support increasing both the Return on Community and Return on Capital of entrepreneurial ecosystems.

gatee press. is a European press and media services agency based in Rhine-Main area in Germany.
Core competency: research and content development for tv, print and online media (tech, travel, f & b, and lifestyle & design.
gatee press. was originally founded in Berlin in 1992. It became an independent business unit of NY-based gatee group in 2009.



NEW YORK CITY Headquarters

295 Madison Avenue , 12th Fl.
New York, NY 10017
United States of America
Front Desk: +1 (646) 980-6899

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