What Makes a Great Collaborator? Eric Sim Shares His Criteria

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Eric Sim

LinkedIn Author

Author | Banker | Speaker

In a recent LinkedIn post, Eric Sim shares his thoughts on what makes a successful collaboration, highlighting the crucial role of work ethic and ability in professional partnerships. Sim recounts his experience co-authoring the book “Small Actions” with Simon Mortlock, detailing how a single in-person meeting was enough to spark the decision to collaborate.

Sim first became aware of Mortlock’s work when Mortlock, then a journalist for efinancialcareers, wrote about Sim’s banking career. Later, when Mortlock invited Sim to contribute career-related articles, Sim, then still in investment banking, lacked the time. Mortlock’s exceptional skill in capturing Sim’s writing style was a pivotal moment.

“Simon wrote a draft based on my LinkedIn writing style. When I read it, I thought I had written it. He was that good.”

The Importance of Work Ethic in Collaboration

This initial positive experience with Mortlock’s writing was foundational. Sim further elaborates on the quality of Mortlock’s work, noting how Mortlock’s minimal edits on Sim’s own submitted articles were a sign of his talent and respect for Sim’s voice.

Trust and Confidence in Professional Partnerships

As Eric Sim notes, the experience of having his articles published with only minor revisions by Mortlock significantly boosted his confidence in his own writing abilities. This trust is a key element Sim values in collaborations.

“Given my weak English, I expected him to rewrite or at least make major edits. No, he changed only a few words and published to efinancialcareer website for tens of thousand finance professionals to read. That gave me confidence in my writing.”

Sim draws a broader conclusion about professional relationships, observing that the number of times one meets a person doesn’t necessarily dictate the ease or desirability of collaboration. Sometimes, a single impactful interaction can be more telling than multiple meetings.

Key Traits for Collaboration: Work Ethic and Ability

Reflecting on these experiences, Sim emphasizes the core qualities he seeks in potential collaborators. While ability is important, Sim places work ethic at the forefront.

Prioritizing Work Ethic Over Acquaintance

In Sim’s view, a strong work ethic is the most critical trait when deciding to embark on a project with someone. This suggests that reliability, dedication, and professionalism are paramount, even more so than familiarity or established rapport.

“For me, the most important traits of the people I like to work with is work ethics, then ability. What do you look for in a person before deciding to collaborate?”

Sim concludes his post by mentioning Mortlock’s new job and expressing his excitement and hope for future collaborations, underscoring the positive and lasting impact of their initial partnership. The narrative serves as a case study on how initial impressions and demonstrated professional qualities can lead to significant and fruitful collaborations.

📝 About This Content

This article is based on insights shared by Eric Sim on LinkedIn.

📅 Originally posted on July 14, 2026 | View original post on LinkedIn →