Ceileigh Mangalam

Ceileigh Mangalam – Editor

Editorial assessments, developmental editing, and copyediting for trade fiction and narrative nonfiction. Based in Vancouver.


Whether you need someone to copyedit your three-volume fantasy series or fill in the plot holes of your mystery thriller, I'm your editor. I provide editorial services ranging from developmental editing to proofreading, as well as editorial assessments.

I have a BA in English and I've been editing professionally since 2015, when I completed Humber College's Creative Book Publishing program. I interned and freelanced at Simon & Schuster Canada for a year before heading west and joining the ranks of Editors Canada.


Ceileigh’s developmental edit of my non-fiction manuscript was invaluable for making what was a complex theoretical argument flow well and be appropriate for wide variety of readers. She made sure the main thread of my argument was clear and consistent throughout my book. She also provided insightful and often alternative points of view for me to consider which not enriched my argument, but also made it more engaging and relevant. For being able to see the big picture of my book and helping me to execute that vision, I highly recommend Ceileigh’s editorial services.

-Dr. Mark Hawkins, author, The Mismatched Human

Ceileigh has been so helpful to me, both in her review comments and her ability to brainstorm with me on character development, structure, plot, and pacing. Her approach to working with me is highly collaborative. She applies her deep knowledge of fiction writing to my manuscript, offering specific insights that have inspired me in the revision process.

​-​Jeff Lefkoff, writer

Ceileigh was an editorial assistant at Simon & Schuster when my bestselling novel Still Mine was published. She was part of an excellent and extremely skilled team who brought the book to life and helped it spend six months on the bestseller list. Ceileigh demonstrated a very sharp eye in her editorial contributions. It was wonderful to work with her!

-Amy Stuart, author, Still Mine, Still Water, and Still Here

Ceileigh’s edits were incredibly helpful for the novel I’m working on. Her knowledge of technical aspects, attention to detail, and spatial awareness in scenes was the feedback I needed to improve my draft. Her fresh perspective and insightful edits fleshed out my writing, and gave me more confidence in the overall story. Thank you so much!

​-Jenn Galambos, writer

Fantasy Literary Fiction Science Fiction
English (CAN) English (US)
  • Creative Book Publishing - Grad Certificate
  • Bachelor of Arts with Honours, English

Work experience


Apr, 2016 — Present

Provide developmental editing, line editing, copyediting, and proofreading services, as well as manuscript evaluation and editorial reports.

Humber Publishing Services

Sep, 2015 — Jan, 2017 (over 1 year)

Provided manuscript evaluation including light editing to first-time authors.

Simon & Schuster Canada

Sep, 2015 — Sep, 2016 (about 1 year)

Supported the editorial department of Simon & Schuster Canada, including pursuing image permissions during book development, creating and editing jacket copy and backmatter (e.g., author interviews), reading manuscripts for consistency, and participating in editorial and acquisition discussions.

Ceileigh has 10 reviews





Aisley O.

Aisley O.

Jan, 2024

Working with Ceileigh was a pleasure. She had great insights into how I could bring out elements in my story that heightened the tension and strengthened it overall. I had so many questions, and she was able to provide me resources. She even took time after she completed her end of the project to reread sections I had questions on in order to help me revise effectively. 10/10, would absolutely ...
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Larry O.

Larry O.

Sep, 2023

Ceileigh M. I would like to leave a review for Caleigh M. the editor who worked on my new book, “In Our Truck and Camper We Traveled the States.” A true story about friendship and travel. Her work and attention to detail were inspiring, thoughtful, and spot-on regarding the corrections and the suggestions she made. She had a pleasant style and I never worried about her competence and compass...
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Robyn I.

Robyn I.

Jan, 2023

I really enjoyed working with Ceileigh. She was very professional and helpful. I'd highly recommend her to anyone looking for developmental and copy editing.
Kyle G.

Kyle G.

Dec, 2022

Working with Ceileigh has been amazing! She was incredible thorough in her work and provided extremely value feedback throughout the editorial process. I'd highly recommend working with her and I am grateful for her help.
Brian D.

Brian D.

Nov, 2022

Ceileigh was really helpful. Helped with a few big things I really overlooked. I would work with her again.

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